Electronics Infoline http://www.electronicsinfoline.com A giant collection of electronics projects and schematics on the web! Wed, 21 Jun 2017 05:33:09 +0000 en-US hourly 1 https://wordpress.org/?v=4.8 Reverse Engineering the ARM1 Processor’s Microinstructions http://www.electronicsinfoline.com/pin/37668/ Wed, 21 Jun 2017 02:23:00 +0000 http://www.electronicsinfoline.com/?guid=d683ce244a64b52469f6fcb80404b321

Pinned onto Ken Shirrif

This article looks at how the ARM1 processor executes instructions. Unexpectedly, the ARM1 uses microcode, executing multiple microinstructions for each instruction. This microcode is stored in the instruction decode PLA, shown below. RISC processors generally don’t use microcode, so I was surprised to find microcode at the heart of the ARM1. Unlike most microcoded processors, […]]]>
Reverse Engineering a Server CPU Voltage Regulator Module http://www.electronicsinfoline.com/pin/42977/ Thu, 15 Jun 2017 23:17:22 +0000 http://andybrown.me.uk/?p=4580

Pinned onto Andys Workshop

A recent ebay fishing expedition yielded an interesting little part for the very reasonable sum of about five pounds. It’s a voltage regulator module from a Dell PowerEdge 6650 Xeon server. I originally bought this because I had the idea of salvaging parts from it to use in another project. These are high quality modules […]]]>
Let’s code with STM32 Nucleo Open Development Platform http://www.electronicsinfoline.com/pin/22978/ Thu, 15 Jun 2017 06:57:30 +0000 http://www.open-electronics.org/?p=14685

Pinned onto Open Electronics

Today we present the first steps with the NUCLEO development boards, produced by STMicroelectronics, that can help us to move towards the ARM 32-bit world with simplicity and great performances , keeping a compatibility with Arduino expansion connectors so that we can use its commonly available shields. The success of Arduino and its countless shields, […]]]>
Three Best LED TV from 2016 you can buy today at Lower Price http://www.electronicsinfoline.com/pin/51126/ http://www.electronicsinfoline.com/pin/51126/#respond Sun, 11 Jun 2017 04:38:55 +0000 http://www.electronicsinfoline.com/?p=51126

Pinned onto Reviews

In 2017, you can still get a very good price of these three best LED TVs from 2016, with almost same feature but at a lower price. Everyone wants to come home from a long day at work and just relax and watch TV. More importantly, they want a TV with a great looking picture, […]]]>
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Best Bluetooth Audio Amplifier in the 50-Watt range http://www.electronicsinfoline.com/pin/51186/ Sat, 10 Jun 2017 06:55:29 +0000 http://www.electronicsinfoline.com/?p=51186

Pinned onto Reviews

As the time progresses, more and more people are using the mobiles and laptops to play sound. Music services like Pandora, Spotify, etc. helps in increasing the use of wireless technology. Yes, there are many ways to stream the sound at your home, office or any place you want, but having the portability is not […]]]>
PIC Micro based MPPT Solar Charger Design http://www.electronicsinfoline.com/pin/39406/ Wed, 31 May 2017 19:32:22 +0000 https://soldernerd.com/?p=1803

Pinned onto Soldernerd

Lukas Fässler from Soldernerd has designed a Solar Charger using PIC18 seried microcontroller. In this article that is also posted in his website, he decribes the design flow as well as provides the design files.     Aiming for very low power consumption While I like the Arduino platform I had to admit that it’s […]]]>
How to make an Open Source Vertical Plotter http://www.electronicsinfoline.com/pin/34217/ Tue, 30 May 2017 01:53:14 +0000 http://www.open-electronics.org/?p=17517

Pinned onto Open Electronics

  The vertical plotter is a kind of printer that is very much appreciated by professionals, since it does not print but draws by means of pens, and exactly in the same way a person would do with his hand; it allows to draw diagrams and sketches of various kind and with the maximum resolution, […]]]>
Build an AM, CW and SSB Regenerative Receiver for Amateur Radio http://www.electronicsinfoline.com/pin/39151/ Sun, 28 May 2017 22:51:00 +0000 http://www.electronicsinfoline.com/?guid=8184e1f6564c6f52b7709d816d801ecc

Pinned onto QRPHB

  In this article, Vasily Ivanenko @ QRP Home Builder shows you how to build a HF or VHF Regenerative Receiver for Amateur Radio use. He called it Regen #5. You can build this on general double-sided PCB and use to receive AM, CW as well as SSB transmission. The assembly of the receiver looks a […]]]>
Back to the Future – Build your Flux Capacitor http://www.electronicsinfoline.com/pin/25630/ Thu, 25 May 2017 20:54:47 +0000 http://www.open-electronics.org/?p=15322

Pinned onto Open Electronics

In this article, Boris from Open Electronics will show you a modern take on the equipment that enabled time travel in Back to the Future. Those who have a few “decades” of ageing on their shoulders should know Back to the Future (but the younger ones as well, since they could know and see it thanks […]]]>
First Project with WireFrame FPGA Board LED Blinking Test – Binary Counter with VerilogHDL, Xilinx ISE Tutorial http://www.electronicsinfoline.com/pin/25036/ Wed, 17 May 2017 20:04:00 +0000 http://www.electronicsinfoline.com/?guid=a455d603e013ec8dbb0dd6258020a154

Pinned onto Circuitvalley

This article is goint be very very  basic , like how to create xilinx ISE project and  write a little binary counter in verilogHDL , how to wireup the module’s port to I/O line of the FPGA . and finally implement the module , we will also simmulate the design with the help of verilog […]]]>
Most effective PCB Prototyping Techniques for Better Performance http://www.electronicsinfoline.com/pin/51115/ Mon, 15 May 2017 05:33:23 +0000 http://www.electronicsinfoline.com/?p=51115

Pinned onto Articles

This is a continuation of our article How to Design a great PCB or Printed Circuit Board If you have not yet seen it, you should consider reading this to get a overall grasp of the whole process of any electronics DIY or Professional Projects from designing to finished products. In this continuation article, you […]]]>
Clear Shot: Which is The Best Digital Camera Under $ 200? http://www.electronicsinfoline.com/pin/51050/ Thu, 11 May 2017 06:34:22 +0000 http://www.electronicsinfoline.com/?p=51050

Pinned onto Reviews

Digital cameras are dime-a-dozen nowadays. Ranging from cheap ones to more expensive professional products, digital cameras have changes a lot since they were first introduced. For someone with a budget, you’ll probably be looking for the best digital camera under $ 200.   Two hundred dollars is a nice cut-off point. It is neither too […]]]>
A Custom Enclosure for the Android Bluetooth Reflow Controller http://www.electronicsinfoline.com/pin/43049/ Tue, 09 May 2017 02:00:52 +0000 http://andybrown.me.uk/?p=4504

Pinned onto Andys Workshop

It’s a good nine or ten months now since I published my design for a reflow oven controller that uses an Android app for display and control. I knew at the time that I would need an enclosure for this controller and not just because of the obvious hazards of having exposed mains voltages but […]]]>
Adding Internet connectivity to Arduino boards and apps with the YUN Shield http://www.electronicsinfoline.com/pin/28720/ Sun, 07 May 2017 20:26:00 +0000 http://www.open-electronics.org/?p=15733

Pinned onto Open Electronics

What if we have already developed an Arduino application and we want internet connectivity for it? Yun shield is the answer.  Yun shield provides Internet connectivity for all Arduino boards. It features the same connectivity functions implemented on Arduino Yun. Yun shield runs the OpenWrt GNU / Linux operating system, specially designed to manage internet connectivity. It’s […]]]>
ESP8266 Programming Basics http://www.electronicsinfoline.com/pin/49895/ Sun, 07 May 2017 19:30:08 +0000 https://blog.squix.org/?p=1824

Pinned onto Squix Techblog

In this post we will have a look at the building blocks of an Arduino sketch. This will help you to build your own sketch quickly. The post covers the serial console, digitalRead and digitalWrite, interrupts, analogRead and finally WiFi, http and https. This text is ...

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Presepino: the nativity scene with Arduino http://www.electronicsinfoline.com/pin/28935/ Sat, 06 May 2017 21:07:11 +0000 http://www.open-electronics.org/?p=15815

Pinned onto Open Electronics

A light system, capable of simulating the alternation of night and day, that will make your nativity scene – be it a small or a big one – even more realistic. Our circuit is capable of piloting four light loads, corresponding to the daylight, to the brilliance of the stars, to the household hearths, and […]]]>
Examining the Core Memory Module inside a vintage IBM 1401 Mainframe http://www.electronicsinfoline.com/pin/37694/ Fri, 05 May 2017 21:11:00 +0000 http://www.electronicsinfoline.com/?guid=b0a9cf66e75ebfc809bf49f081c72ddb

Pinned onto Ken Shirrif

The IBM 1401 mainframe computer was announced in 1959 and by the mid-1960s had become the best-selling computer, extremely popular with medium and large businesses because of its low cost. A key component of the 1401’s success was its 4,000 character core memory, which stored data on tiny magnetized rings called cores.   The 4000-character […]]]>
The Drink Maker: Open Sourcing your Cocktail! http://www.electronicsinfoline.com/pin/23621/ Thu, 04 May 2017 23:04:27 +0000 http://www.open-electronics.org/?p=14728

Pinned onto Open Electronics

  Based on RandA, this machine can prepare cocktails, by drawing the quantities from dedicated dispensers, according to recipes dowloaded from the webpage from which the drink has been requested. Learn more in this first post. If one has the possibility to relax and maybe doesn’t have to get behind the wheel for a while, […]]]>
Understanding silicon circuits: inside the ubiquitous 741 op amp http://www.electronicsinfoline.com/pin/37688/ Wed, 03 May 2017 19:18:00 +0000 http://www.electronicsinfoline.com/?guid=2b5b69287e27123a08098f967794c4d1

Pinned onto Ken Shirrif

The 741 op amp is one of the most famous and popular ICs[1] with hundreds of millions sold since its invention in 1968 by famous IC designer Dave Fullagar. In this article, I look at the silicon die for the 741, discuss how it works, and explain how circuits are built from silicon. The 741 […]]]>
ArdIR a programmable and remotely manageable Infrared control with Arduino http://www.electronicsinfoline.com/pin/23499/ Wed, 03 May 2017 13:16:48 +0000 http://www.open-electronics.org/?p=14814

Pinned onto Open Electronics

This project presents a universal infrared remote control that can also be managed via Internet, based on RandA (supplied with a dedicated shield) and on Raspberry Pi2. Despite the fact that still only a few people take advantage of the “smart” revolution in home automation (intended as a complete and integrated automation and computerization of […]]]>
Die photos and analysis of the revolutionary 8008 microprocessor, 45 years old http://www.electronicsinfoline.com/pin/45108/ Sun, 30 Apr 2017 19:10:00 +0000 http://www.electronicsinfoline.com/?guid=cdcabc900e5b1b4833241dbbadd682cb

Pinned onto Ken Shirrif

Intel’s groundbreaking 8008 microprocessor was first produced 45 years ago.1 This chip, Intel’s first 8-bit microprocessor, is the ancestor of the x86 processor family that you may be using right now. I couldn’t find good die photos of the 8008, so I opened one up and took some detailed photographs. These new die photos are […]]]>
Bridge Monitoring System using Wireless Sensor Network http://www.electronicsinfoline.com/pin/46660/ Wed, 26 Apr 2017 21:24:55 +0000 http://iamzxlee.wordpress.com/?p=1977

Pinned onto Zx Lee

It’s been a long time since I last work on any hobby project and update on my blog. Recently, I completed a mini project together with two of my friends. So I am going to take this opportunity to share... Continue Reading →]]>
ESP8266: Turn a $9 Body Scale into a Smart Scale – Part 1 http://www.electronicsinfoline.com/pin/38351/ Wed, 26 Apr 2017 14:02:45 +0000 http://blog.squix.org/?p=615

Pinned onto Squix Techblog

In this project I will show you how you can build yourself a fancy Withings-like body scale. I divided the article into two parts: Part 1 describes the hardware hack and Part 2 the software. In this project I used a cheap scale I bought in the local super market for 9 Swiss Francs (which is currently […]]]>
Reverse engineering the popular 555 timer chip (CMOS version) http://www.electronicsinfoline.com/pin/37664/ Tue, 25 Apr 2017 18:34:00 +0000 http://www.electronicsinfoline.com/?guid=707496886c70fca7cd1eeb6f252f75ec

Pinned onto Ken Shirrif

  Above 555 chip photo credit Windell Oskay This article explains how the LMC555 timer chip works, from the tiny transistors and resistors on the silicon chip, to the functional units such as comparators and current mirrors that make it work. The popular 555 timer integrated circuit is said to be the world’s best-selling integrated […]]]>
FISHINO becomes Mega http://www.electronicsinfoline.com/pin/35387/ Tue, 25 Apr 2017 13:08:49 +0000 http://www.open-electronics.org/?p=17611

Pinned onto Open Electronics

  The Fishino version of the powerful and popular board, Arduino MEGA: a revised  hardware with a different power section.   In this article we will present Fishino MEGA. It is a board that is compatible with Arduino Mega. In its hardware we implemented a significant innovation: the possibility to have it battery powered. As […]]]>
Gesture recognition with Arduino http://www.electronicsinfoline.com/pin/24261/ Sun, 23 Apr 2017 08:32:01 +0000 http://www.open-electronics.org/?p=14915

Pinned onto Open Electronics

  With the board described here, we will interface the electrode board for gesture recognition to Arduino.   To take advantage of the potential of the MGC3130 integrated circuit, we thought of developing a new electrode having the possibility to connect (in addition to our demo board, that we saw in the previous episode), even […]]]>
Output Inductor Calculation for SMPS Converters using the Forward, Push-Pull, Half-Bridge and Full-Bridge Topologies http://www.electronicsinfoline.com/pin/38334/ Sun, 09 Apr 2017 21:14:00 +0000 http://www.electronicsinfoline.com/?guid=6cf638bc507dbab21e7b90d462aeefe8

Pinned onto Tahmid's Blog

An output inductor is found at the output of every forward-mode converter. Converters utilizing the forward, push-pull, half-bridge and full-bridge topologies are all forward-mode converters. So, calculation of the output inductance follows the same methodology for all four of these popular topologies. The purpose of the output inductor is to store energy for the load […]]]>
Inside Card Sorters of 1920s – Data Processing with Punched Cards and Relays http://www.electronicsinfoline.com/pin/37662/ Fri, 07 Apr 2017 19:31:00 +0000 http://www.electronicsinfoline.com/?guid=7b6ee20c78d85a6dbaaff758634ba688

Pinned onto Ken Shirrif

Punched card sorters were a key part of data processing from 1890 until the 1970s, used for accounting, inventory, payroll and many other tasks. This article looks inside sorters, showing the fascinating electromechanical and vacuum tube circuits used for data processing in the pre-computer era and beyond. Herman Hollerith invented punch-card data processing for the […]]]>
AC Power Control with Thyristor – Phase Angle Control using triac with PIC16F877A http://www.electronicsinfoline.com/pin/38328/ Thu, 06 Apr 2017 23:56:00 +0000 http://www.electronicsinfoline.com/?guid=be3296792ff19bc3dac48a1519639a99

Pinned onto Tahmid's Blog

Principle of Phase Angle Control Top – Output Voltage Bottom – Gate Drive Signal Image source: Wikipedia (http://en.wikipedia.org/wiki/File:Regulated_rectifier.gif) The photo above clearly illustrates phase angle control: output voltage controlled by the gate drive signal applied to a thyristor. What is phase angle control? That is what I’m going to talk about in this article. Phase […]]]>
Jupiter Receiver Experiment notes http://www.electronicsinfoline.com/pin/39147/ Wed, 05 Apr 2017 21:12:00 +0000 http://www.electronicsinfoline.com/?guid=fb1346560fe4e475af0b7423f81782ec

Pinned onto QRPHB

Every builder, I suppose, learns in their own way — I believe that making and measuring real circuit’s yields dividends par none.  Hats off to the SPICE kings — simulation might be the next best thing for those who lack the instruments needed to measure data and make comparisons — and for getting starting values […]]]>
An Open Source Motor Controller for everyone http://www.electronicsinfoline.com/pin/25280/ Mon, 03 Apr 2017 21:43:23 +0000 http://www.open-electronics.org/?p=15178

Pinned onto Open Electronics

It is open source and based upon the ATmega32U4 microcontroller, and provided with drivers for two DC brush motors and a stepper motor. It receives commands via USB or serial ports, or via the I²C bus. For those dealing with robotics, one of the problems to solve is the management of the motors used for […]]]>
How to Open a Microchip and what’s inside? http://www.electronicsinfoline.com/pin/50752/ Wed, 29 Mar 2017 04:34:10 +0000 http://www.electronicsinfoline.com/?p=50752

Pinned onto Articles

How to «open» microchip and what's inside? Microchips - are indeed can be considered a black box - as long as it's working you normally don't look inside. But what if you want to? Today we'll show how to "open" chips and what's inside. WARNING! All operations with concentrated (and especially hot) acids are extremely [...]]]>
Die Photos and Analysis of the LM108 Operational Amplifier http://www.electronicsinfoline.com/pin/43712/ Tue, 28 Mar 2017 16:25:00 +0000 http://www.electronicsinfoline.com/?guid=e3e33cfabc38bad7e70d3b907fb8dc84

Pinned onto Ken Shirrif

The LM108 op amp is an interesting chip to examine under a microscope because it uses special superbeta transistors for high performance. Photos of the die reveal the tiny circuitry of the chip as well as unused components that make the chip more complex than necessary. Surprisingly, these extra components allow the same die to […]]]>
Gesture recognition with Raspberry Pi and GestIC http://www.electronicsinfoline.com/pin/24456/ Sun, 26 Mar 2017 11:45:55 +0000 http://www.open-electronics.org/?p=15078

Pinned onto Open Electronics

  Let’s couple the 3D gesture recognition electrode to Raspberry Pi, in order to create an application with which the pictures can be scrolled on a HDMI screen, by means of gestures.   In an another post we described a new GestIC electrode, which has been developed and created for the purpose of interfacing the Arduino Uno […]]]>
Macbook charger teardown: The surprising complexity inside Apple’s power adapter http://www.electronicsinfoline.com/pin/37686/ Fri, 24 Mar 2017 06:34:00 +0000 http://www.electronicsinfoline.com/?guid=49be35cb4003b3eeff974c78cb254884

Pinned onto Ken Shirrif

Have you ever wondered what’s inside your Macbook’s charger? There’s a lot more circuitry crammed into the compact power adapter than you’d expect, including a microprocessor. This charger teardown looks at the numerous components in the charger and explains how they work together to power your laptop. Inside the Macbook charger. Many electronic components work […]]]>
Reverse engineering the ARM1, ancestor of the iPhone’s processor http://www.electronicsinfoline.com/pin/37682/ Tue, 21 Mar 2017 18:13:00 +0000 http://www.electronicsinfoline.com/?guid=522341e502f64e440347a92233daa919

Pinned onto Ken Shirrif

Almost every smartphone uses a processor based on the ARM1 chip created in 1985. The Visual ARM1 simulator shows what happens inside the ARM1 chip as it runs; the result (below) is fascinating but mysterious.[1] In this article, I reverse engineer key parts of the chip and explain how they work, bridging the gap between the […]]]>
The ARM1 processor’s flags, reverse engineered http://www.electronicsinfoline.com/pin/37674/ Tue, 21 Mar 2017 16:26:00 +0000 http://www.electronicsinfoline.com/?guid=82f68d6577a6c0ad93a778ab3c35504f

Pinned onto Ken Shirrif

This article reverse-engineers the flag circuits in the ARM1 processor, explaining in detail how the flags are generate, controlled, and used. Condition flags are a key part of most computers, since they allow the computer to change what it does based on various conditions. The flags keep track of conditions such as a value being […]]]>
The SEPIC switching converters http://www.electronicsinfoline.com/pin/39083/ Tue, 21 Mar 2017 09:44:40 +0000 http://www.open-electronics.org/?p=18015

Pinned onto Open Electronics

  The SEPIC configuration, a very useful one, is used in modern converters for mixed supply systems. Thanks to the availability of an always growing number of specialized integrated circuits that realize – with the help of very few external components – some complete and valid voltage regulators, today the switching technology is the most […]]]>
Let’s Build an Open Source Quadcopter – Part 1 http://www.electronicsinfoline.com/pin/36734/ Mon, 20 Mar 2017 09:16:11 +0000 http://www.open-electronics.org/?p=17876

Pinned onto Open Electronics

  Nowadays most people call “drone” something that is, actually, a multicopter whose most common form is “incarnated” by the quadcopter. Generically, a drone is a robot, but war zones news accustomed us to use the word “drones” to describe those aircrafts that are capable of autonomous flight. The related technology was born – as […]]]>
Let’s Build an Open Source Quadcopter – Part 2 http://www.electronicsinfoline.com/pin/36968/ Mon, 20 Mar 2017 08:29:48 +0000 http://www.open-electronics.org/?p=17920

Pinned onto Open Electronics

  Let’s complete the construction of our aircraft and test it.   Now that you have physically created the quadcopter – according to the indications supplied in the first installment of this article (published here) – you may move on to the operational stages, and see as a first thing the commands available for our […]]]>
USB HID device development on the STM32 F042 http://www.electronicsinfoline.com/pin/43053/ Sat, 11 Mar 2017 10:07:00 +0000 http://andybrown.me.uk/?p=4423

Pinned onto Andys Workshop

The STM23 F042 series is ST’s cheapest route into USB device programming for the F0 series of STM32 microcontrollers. In hacker-friendly units of one you can buy an STM32F042F6P6 (48Mhz, 32Kb flash, 6Kb SRAM, TSSOP20) for £1.47 at Farnell today. STM32F042 TSSOP20 0.65mm pitch package If you need more IO pins then there are QFP […]]]>
Open Wheels 2 – an all-in-one board to control any of your Robotic Projects http://www.electronicsinfoline.com/pin/36334/ Fri, 10 Mar 2017 12:16:25 +0000 http://www.open-electronics.org/?p=17704

Pinned onto Open Electronics

A scalable board to prototype motion control applications for automatic balanced robot or any other robot on wheels.   It was the 2013 when we presented a control board to make a clone of the famous SegWay: the OpenWheels project. In recent years, the focus on systems to stabilize unstable ones grew up sensibly. Just look […]]]>
The ESP WiFi Shield: the best value for money and low energy consumption http://www.electronicsinfoline.com/pin/32190/ Fri, 10 Mar 2017 07:42:27 +0000 http://www.open-electronics.org/?p=17127

Pinned onto Open Electronics

It supplies Arduino with the WiFi connectivity and the external memory support on a SD-Card; it is based on a new module that is completely programmable, and offers the best value for money, with a very limited energy consumption that make it ideal for battery applications.   It is not the first time that we […]]]>
A high current power supply built around a server voltage regulator http://www.electronicsinfoline.com/pin/46804/ Thu, 09 Mar 2017 21:30:05 +0000 http://andybrown.me.uk/?p=4615

Pinned onto Andys Workshop

Regular readers of this blog will have already seen the article that I published about 4 months ago where I attempted to reverse engineer a voltage regulator module originally designed to fit into a Dell server. The theory was that these would be high quality, stable and robust designs that could prove useful if I […]]]>
An open source 3D Scanner made with Raspberry Pi http://www.electronicsinfoline.com/pin/36494/ Thu, 09 Mar 2017 13:30:50 +0000 http://www.open-electronics.org/?p=17797

Pinned onto Open Electronics

By making use Raspberry Pi, we created an easy to build 3D scanner to be used for the acquisition of three-dimensional models via a video camera and a laser. 3D printing keeps on establishing itself, mostly thanks to the availability of more user-friendly 3D printers and price drops. Those who use a 3D printer do […]]]>
Working with the Xilinx Virtex-E FPGA in a huge BGA package http://www.electronicsinfoline.com/pin/43043/ Wed, 08 Mar 2017 20:35:44 +0000 http://andybrown.me.uk/?p=4545

Pinned onto Andys Workshop

Let me see now, it must have been about two years ago when this story started. I was bored. I can’t remember why but when I’m bored I often surf ebay just to see what interesting bits and pieces are out there. Mostly it’s the same old stuff repeated over and over. Cheap bare PCB […]]]>
Atmel AVR ATMega16 Interfacing WIth 16×2 char LCD http://www.electronicsinfoline.com/pin/25062/ Sat, 04 Mar 2017 12:28:00 +0000 http://www.electronicsinfoline.com/?guid=90d3ac39fe7370da2f49147e3439ad20

Pinned onto Circuitvalley

An alphanumeric low cost LCD Display is very essential for may small and big projects to Display various type of information. Hitachi HD44780  Chipset based 16×2 char LCD is Really very cheap and easily available in the local market. Project Description:-   In this project we are going to learn various things about this chip set and displaying text on […]]]>
AC Power Control with Thyristor – Pulse Skipping using triac with PIC16F877A http://www.electronicsinfoline.com/pin/38326/ Fri, 03 Mar 2017 17:45:00 +0000 http://www.electronicsinfoline.com/?guid=1e5128be41ad9be3651adc4ee1969906

Pinned onto Tahmid's Blog

Pulse Skipping Modulation Green – Input AC Yellow – Output AC after Pulse Skipping Modulation Pink – Gate Drive Signal   Pulse skipping modulation (PSM) or cycle control or burst fire is a method of power control where whole cycles of voltage are applied to the load. Here I’ll talk about PSM involving a thyristor, […]]]>
Homemade ARM Board Running Linux with LCD – Part1 – Requirement Definition http://www.electronicsinfoline.com/pin/26556/ Fri, 03 Mar 2017 15:57:00 +0000 http://www.electronicsinfoline.com/?guid=dbe2b63c5b720d7bf25487b3e6baf3b1

Pinned onto Circuitvalley

After quite lot of research through various online document and article and working with many different things, i have finally managed to get my first Linux capable ARM Cortex-A8 board up and running. making the board i hae faced many different kind of difficulties with different section. the board is Based to a ARM Cortex-A8 […]]]>
Development Board for the STM32F042 http://www.electronicsinfoline.com/pin/43055/ Fri, 03 Mar 2017 15:23:43 +0000 http://andybrown.me.uk/?p=4378

Pinned onto Andys Workshop

It’s been a while since I posted a new article, a delay at least partly due to me herniating a disc in my neck which left me completely unable to look downwards for any length of time and as you’ll know all too well you can’t work on circuit boards without peering down at them. […]]]>
How Frequency Counter Works? And Build a Nanocounter using an FPGA, STM32 and a Bluetooth Android App http://www.electronicsinfoline.com/pin/43051/ Fri, 03 Mar 2017 11:30:59 +0000 http://andybrown.me.uk/?p=4457

Pinned onto Andys Workshop

Here we have a good example of how a requirement for a simple tool spirals out of control and spawns a project that takes months to complete and ends up dwarfing the project that it was originally expected to facilitate. You see, some time ago I was fiddling around with a project, something to do […]]]>
Create a connected Fish Tank with Fishino http://www.electronicsinfoline.com/pin/32958/ Fri, 03 Mar 2017 09:04:50 +0000 http://www.open-electronics.org/?p=17295

Pinned onto Open Electronics

  Thanks to the Fishino board, we will make an existing fish tank smart, and we will place it in the IoT world.   By now, technology has made way in our daily life as well, and the home automation becomes every day more familiar: it is easy to think, for example, to a heating […]]]>
Radionova 1 Frequency Synthesizer http://www.electronicsinfoline.com/pin/39127/ Fri, 03 Mar 2017 04:46:00 +0000 http://www.electronicsinfoline.com/?guid=ceac70b554a5c82c848bd9c1dcf7513e

Pinned onto QRPHB

Frequency synthesizer for my Jupiter receiver — Радионова 1 —  [ Radionova 1 ] Greetings!  Most of my future homebrew radio projects will focus on building radio astronomy gear. Radio astronomy offers much fun + learning for the radio homebuilder — example topics include how to design and make antennas, LNAs, receivers, and frequency synthesizers […]]]>
QRP WorkBench Line-in Audio Amplifier — Part 1 http://www.electronicsinfoline.com/pin/39139/ Wed, 01 Mar 2017 04:08:00 +0000 http://www.electronicsinfoline.com/?guid=1d6a1dcb8974f86194483622c5849c7e

Pinned onto QRPHB

Each Fall, I view design media and experiment @ AF to boost my skills and know-how. A bigger bench means room for more test equipment & accessories. Lately, I’m enjoying a bench activity maxima. In Part 1, I show a new line-in AF amplifier and in Part 2 some lessons learned about reducing noise and […]]]>
Build This Dummy Load for Testing Transmitters http://www.electronicsinfoline.com/pin/37696/ Wed, 01 Mar 2017 02:40:41 +0000 http://dangerousprototypes.com/blog/?p=92289

Pinned onto Dangerous Prototypes

  A simple DIY dummy load project from Flathagen: I have created a simple 50 Ω dummy load to test transmitters. I also added a simple RF diode detector so I can measure the peak voltage, and calculate the power. The dummy load consists of eight 100 Ω resistors rated at 2 W so the […]]]>
QRP WorkBench Line-in Audio Amplifier — Part 2 http://www.electronicsinfoline.com/pin/39137/ Tue, 28 Feb 2017 21:24:00 +0000 http://www.electronicsinfoline.com/?guid=6c5322a4566f85d5b066bd4f952e1068

Pinned onto QRPHB

Welcome to Part 2 I share some experiments, plus a few thoughts & observations from my QRP workbench. [A]  Some general points in AF design and breadboarding [1] Expect your amplifiers to oscillate and design to mitigate this. [2] Read your datasheet(s). [3] As possible, identify the frequency of any parasitic oscillations by measurement. If […]]]>
How to Design a great PCB or Printed Circuit Board http://www.electronicsinfoline.com/pin/50470/ Sat, 18 Feb 2017 05:16:44 +0000 http://www.electronicsinfoline.com/?p=50470

Pinned onto Articles

PCB or Printed Circuit Board is the physical implementation of an electronic circuit.  PCB design is a very specialized task, an art which can only be mastered through training or attained with experience. For a novice electronic hobbyist, laying out a PCB design might turn out to be a pretty daunting task, especially if the […]]]>
Ten Amazing Things you can do with your Smartphone http://www.electronicsinfoline.com/pin/50087/ Thu, 16 Feb 2017 18:06:35 +0000 http://www.electronicsinfoline.com/?p=50087

Pinned onto Articles

Advanced mobile phones are not made for simply messaging and phone calls; there are sure different things which they can perform for us. Even beside tasks which is common today, like social media browsing, chatting, browsing etc, they can perform even more. In this article, we shall look at some of them that is now possible […]]]>
The Significance of X-rays in Medical Imaging – A Technical Overview http://www.electronicsinfoline.com/pin/49951/ Wed, 15 Feb 2017 06:04:06 +0000 http://www.electronicsinfoline.com/?p=49951

Pinned onto Articles

This article will elucidate how a typical x-ray imaging device works and what are the various uses of x-ray imaging in the healthcare domain. You will learn the following:   What are X-rays? The Components of an X-ray Imaging Device Factors affecting x-ray Image Quality Applications of X-ray based Medical Imaging Comparison of x-ray imaging with […]]]>
15 Arduino Projects that you will love to see http://www.electronicsinfoline.com/pin/49849/ Sat, 11 Feb 2017 18:11:32 +0000 http://www.electronicsinfoline.com/?p=49849

Pinned onto Articles

Do you know Arduino borrowed its name from a nearby watering hole called Bar di Re Arduino where it was first developed in Italy? See this infographics first, created by Make: magazine. Click here if you want to see it full screen. Opens in a new window. It is 10 years after its appearance and by […]]]>
Five Best Oscilloscopes for Your Home Lab http://www.electronicsinfoline.com/pin/49840/ Sat, 11 Feb 2017 17:29:08 +0000 http://www.electronicsinfoline.com/?p=49840

Pinned onto Articles

As I had some core electronics subjects during my graduation, I worked on various electrical projects in my college lab. My eagerness led me to bring an Oscilloscope at my home for tinkering with the electrical circuits and devices. For setting up a personal lab at home, you should take some serious interest in choosing […]]]>
A FPGA controlled RGB LED MATRIX for Incredible Effects – the Hardware http://www.electronicsinfoline.com/pin/49812/ Fri, 10 Feb 2017 21:25:50 +0000 http://dangerousprototypes.com/blog/?p=93626

Pinned onto Dangerous Prototypes

Boris Landoni from Open Electronics writes: In this post you will find  the description of a graphic display that uses a modular solution based on dot matrix blocks (in which each dot is a RGB LED), that are driven – via a specific bus – by a very powerful control board, that is entirely programmable […]]]>
Using Nanotimers to Reduce IoT System Power Consumption by an Order of Magnitude http://www.electronicsinfoline.com/pin/49791/ Fri, 10 Feb 2017 18:30:15 +0000 https://www.eeweb.com/design-articles/using-nanotimers-to-reduce-iot-system-power-consumption-by-an-order-of-magn/

Pinned onto EEWeb

Reducing power and cost are often two of the most crucial factors when designing a battery-powered system. Reducing power consumption plays an in important role to extend system life by reducing overall system current. Hence, as a result, power reduction paves the way to cut down system cost by reducing the required battery capacity.

This concept readily applies to Internet of Things (IoT) systems and connected products such as wearables, wireless sensors and building automation systems. The life of the growing number of wireless sensor endnodes in the system all are constrained by one thing: power consumption of the end-node. Such sensor end nodes are typically powered by batteries, which last from several months to several years, depending on the power consumption of each end node. Here the “shelf-life” of a given sensor node is purely dependent on the lifetime of the battery. Though it is possible to simply replace the battery towards the end of the node’s life, it is not always practical to do so as the replacement itself can become an expensive “total cost of ownership."

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Replace a microwave’s beeping with the Windows XP startup sound http://www.electronicsinfoline.com/pin/49798/ Fri, 10 Feb 2017 16:37:59 +0000 https://blog.arduino.cc/?p=16220

Pinned onto Arduino Blog

When your microwave is done with its food, it generally beeps… and beeps… and beeps. Though you definitely want to know when your frozen burrito is edible, if you get to it right when it wants, things can get quite annoying. Tim Gremalm decided to do something about it, and replaced the buzzer in his appliance with an […]]]>
A DIY Laser Scanning Microscope http://www.electronicsinfoline.com/pin/49415/ Thu, 09 Feb 2017 19:03:56 +0000 https://blog.arduino.cc/?p=16205

Pinned onto Arduino Blog

With a DVD pick-up, an Arduino Uno, a laser, and an LDR, Instructables user “Venkes” has managed to create a DIY Laser Scanning Microscope (LSM). A laser microscope works by shining a beam of light on a subject in an X-Y plane. The intensity of the reflected light is then detected by a photoresistor (or LDR) and recorded. […]]]>
The Art (maybe a bit of Science too) of Troubleshooting! http://www.electronicsinfoline.com/pin/49404/ Thu, 09 Feb 2017 18:23:00 +0000 http://www.electronicsinfoline.com/?guid=5a44472ffc20a1befd5e41edcc023021

Pinned onto N6QW

Three Easy Steps To Troubleshooting!What are you kidding? There simply are no three easy steps. So get over it! That indeed is the heart of the problem --we all want to slide into home, take the easy way out, do the minimum work, send out 100 emai...]]>
Reverse-engineering the surprisingly advanced ALU of the 8008 microprocessor http://www.electronicsinfoline.com/pin/49388/ Thu, 09 Feb 2017 16:57:00 +0000 http://www.electronicsinfoline.com/?guid=8f5022a8c785bdc4a07be5d4db8892ac

Pinned onto Ken Shirrif

A computer's arithmetic-logic unit (ALU) is the heart of the processor, performing arithmetic and logic operations on data. If you've studied digital logic, you've probably learned how to combine simple binary adder circuits to build an ALU. However, the 8008's ALU uses clever logic circuits that can perform multiple operations efficiently. And unlike most 1970's microprocessors, the 8008 uses a complex carry-lookahead circuit to increase its performance.

The 8008 was Intel's first 8-bit microprocessor, introduced 45 years ago.1 While primitive by today's standards, the 8008 is historically important because it essentially started the microprocessor revolution and is the ancestor of the x86 processor family that are probably using right now.2 I recently took some die photos of the 8008, which I described earlier. In this article, I reverse-engineer the 8008's ALU circuits from these die photos and explain how the ALU functions.

Inside the 8008 chip

The image below shows the 8008's tiny silicon die, highly magnified. Around the outside of the die, you can see the 18 wires connecting the die to the chip's external pins. The rest of the chip contains the chip's circuitry, built from about 3500 tiny transistors (yellow) connected by a metal wiring layer (white).

Die photo of the 8008 microprocessor, showing important functional blocks.

Die photo of the 8008 microprocessor, showing important functional blocks.

Many parts of the chip work together to perform an arithmetic operation. First, two values are copied from the registers (on the right side of the chip) to the ALU's temporary registers (left side of the chip) via the 8-bit data bus. The ALU computes the result, which is stored back into the accumulator register via the data bus. (Note that the data bus splits and goes around both sides of the ALU to simplify routing.) The carry lookahead circuit generates the carry bits for the sum in parallel for higher performance.3 This is all controlled by the instruction decode logic in the center of the chip that examines each machine instruction and generates signals that control the ALU (and other parts of the chip).

The Arithmetic-Logic Unit

The 8008's ALU implements four functions: Sum, AND, XOR and OR. The Sum operation adds two 8-bit numbers. The remaining three operations are standard Boolean logic operations. The AND operation sets an output bit if the bit is set in the first AND the second number. OR checks if a bit is set in the first OR the second number (or both). XOR (exclusive-or) checks if a bit is set in the first OR the second number (but not both).

The concept of carries during addition is a key part of the ALU. Binary addition in a processor is similar to grade-school long addition, except with binary numbers instead of decimal. Starting at the right, each column of two numbers is added and there can be a carry to the next column. Thus, in each column, the ALU adds two bits as well as a carry bit.

In most early microprocessors, addition of each column needs to wait until the column to the right has been added and the carry is available. The carry "ripples" through the bits, right to left, slowing the addition. The 8008, however, uses a fast carry-lookahead circuit3 to generate the carries for all 8 columns in parallel before the addition happens. Then all the columns can all be added in parallel without waiting for the carry to "ripple" through the sum. This carry-lookahead circuit is an unusual feature to see in an early microprocessor due to its complexity.

Since the 8008 is an 8-bit processor, the ALU operates on two eight-bit arguments. Most 8-bit processors (including the 8008) use a "bit-slice" construction for the ALU, with a one-bit ALU slice repeated eight times. Each one-bit ALU slice takes two input bits and the carry-in bit, and produces the output bit. In most 8-bit processors, the bit-slice ALU is arranged by stacking 8 rectangular ALU slices to form a compact, regular block. However, the 8008 has its eight ALU slices arranged in an irregular fashion—some blocks are even sideways—as shown in the diagram below. The motivation for this is that the carry lookahead circuit takes up a triangular space on the chip. To fit the remaining space better, the 8008's ALU is arranged into its unusual triangular layout.

Arrangement of the eight ALU slices on the 8008 microprocessor die. Unlike most processors, the 8008's ALU slices are arranged in a haphazard triangular arrangement. This fits better with the triangular carry-lookahead circuit above the ALU.

Arrangement of the eight ALU slices on the 8008 microprocessor die. Unlike most processors, the 8008's ALU slices are arranged in a haphazard triangular arrangement. This fits better with the triangular carry-lookahead circuit above the ALU.

Zooming in on the die photo, we can look at one of the ALU slices and see how the circuitry is constructed. The chip is built from three layers (to simplify slightly). The topmost layer is the metal wiring. It is the most visible feature, and looks metallic (not surprisingly). In the detail below, you can see the horizontal and vertical metal traces. The polysilicon layer is underneath the metal layer and appears yellow/orange under the microscope. Polysilicon can act as wiring, but more importantly it forms the gates of the transistors, switching them on and off. The bottom layer is the grayish silicon die itself, but it is hard to see under the other layers.

Die photo of the 8008 processor, zoomed in on the circuit for one bit of the ALU.

Die photo of the 8008 processor, zoomed in on the circuit for one bit of the ALU.

In the diagram above, the carry c and the complemented a and b inputs enter through the metal wires at the top. The ALU output is at the bottom. The control signals are horizontal metal lines. The circuit is powered by the Vcc (+5 volts) and Vdd (-9 volts) metal lines. The brighter yellow polysilicon regions are transistors. Each gate in the circuit requires a "load resistor" connected to Vdd to pull its output low; for improved performance, these are implemented with transistors rather than resistors.

Removing the metal layer with acid makes the silicon and polysilicon layers more visible, as shown below.6 The chip is formed on a silicon wafer with regions of it "doped" with impurities to create regions of semiconducting silicon. You can see dark lines along the border between doped silicon and undoped silicon. A transistor is formed where a yellowish polysilicon wire crosses the doped silicon. The transistor forms a switch between the two silicon sides, controlled by the polysilicon gate. Each ALU slice contains 20 transistors; the diagram below points out two of them.5

With the metal layer removed from the 8008 processor die, the underlying silicon is visible. The photo shows bit 1 of the 8008's ALU.

With the metal layer removed from the 8008 processor die, the underlying silicon is visible. The photo shows bit 1 of the 8008's ALU.

Simulating one slice of the ALU

By examining the die photos carefully, you can map out the ALU slice's 20 transistors and their connections. From this, you can reverse-engineer the gates that make up the circuit. I explained in my previous article how PMOS gates are structured, so I won't go into the details here. The result is the schematic below, showing one bit of the ALU. Each ALU slice takes two inputs (a and b) and the input carry c, and outputs one result bit. There are three mode lines (m1, m2 and m3) that select one of the four ALU operations.7

The schematic below is interactive. First, select an operation and the table will update with results for the eight different inputs. Next, click a row in the table, and the schematic will update, showing how the ALU computes that row. (Note that the a and b inputs to the ALU are inverted, indicated by an overbar.)

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Operation: SumANDORXOR

While this ALU slice looks like it is made of many gates, physically it is only three gates: two large, multilevel AND-OR-NAND gates and one NAND gate. The AND-OR-NAND logic is implemented on the chip as a single complex gate, rather than by combining simpler gates, since a single large gate provides better performance with less circuitry than multiple small gates. One feature of MOS logic is it's just as easy to form an AND-OR-NAND gate (for instance) as a plain NAND gate.

Understanding the ALU logic

The 8008's ALU circuit above looks like a mysterious collection of gates, but eventually I figured out the structure behind it. The starting point is a full adder that handles the Sum operation. (A full adder adds three input bits (a, b and c) and outputs the (low-order) sum bit and a carry bit.) The full adder is then heavily modified to support the logic operations, yielding the ALU from the previous section. The logic operations are implemented by using the mode lines to block parts of the circuit, yielding XOR, AND or OR, rather than the more complex Sum.

The diagram below strips down the 8008's ALU circuit to reveal the full adder "hidden" inside. The gate in red generates the carry-out from the three inverted inputs, using relatively straightforward logic. (Since the 8008 uses carry-lookahead, this carry-out signal isn't passed to the next ALU slice, but just used to generate the ALU output.) If you examine the possible sum cases, you will see that the sum bit is almost always just the carry-out inverted, except for the 0+0+0 and 1+1+1 cases. Thus, the sum bit can be generated by inverting the carry-out and handling the two exceptional cases.8 The two gates indicated below handle the exceptions by forcing the sum output to the correct value.

Simplified 8008 ALU slice, showing the full adder circuit.

Simplified 8008 ALU slice, showing the full adder circuit.

Comparing the full adder with the full ALU circuit earlier shows how the mode lines support the logic operations. Once you have a full adder, generating XOR is simply a matter of setting the carry-in to 0, which is done by the m3 control line. For the OR and AND operations, mode lines m3 and m2 respectively disable all of the circuit except the gates labeled in green.9 Thus, if you start with a full-adder and extend it to support XOR, AND and OR, the 8008's ALU circuit is a logical result.

Intel's earlier 4004 microprocessor had a simple ALU that only supported addition and subtraction, not any logic operations.10 Interestingly, the 4004's ALU circuit is almost identical to the full adder circuit shown above. So it's very likely that Intel designed the 8008 ALU by extending the 4004 ALU as described above. This would explain why the 8008's ALU generates carries internally, even though the carry lookahead circuit made this redundant.11

The 8008's ALU logic is very similar to the Z80's ALU,12 although the Z80's ALU is (surprisingly) 4 bits (details). The 8085 uses a different complex gate arrangement. The 6502 on the other hand, uses an entirely different approach: straightforward circuits for addition, AND, OR, XOR and shift-right, using pass-transistor multiplexers to select the operation.

Instruction decoding: how the ALU knows what operation to do

The 8008 executes 8-bit instructions, which move data, perform I/O, branch, call subroutines, and so forth. The instruction decoding logic examines the instruction and determines what operation to perform, generating about 30 control signals.13 Over a quarter of the instructions perform ALU operations, and the instruction set is carefully designed so three bits of the instruction specify which of the eight operations to perform.14 By examining these bits, the instruction decoder generates the ALU's mode control lines m1, m2 and m3.

Looking at AND instructions illustrates how this works. All AND instructions have the bit pattern xx100xxx (where x is either 0 or 1). For instance, the instruction to AND with memory is 10100111 and the instruction to AND with a constant is 00100100. When the instruction decode circuit matches this pattern, it pulls the m1 control line low, which causes the ALU to perform an AND operation.7 Other bit patterns generate the other ALU control signals.15

Part of the 8008's instruction decode PLA. The three indicated transistors match opcode pattern XX100XXX, indicating an AND instruction.

Part of the 8008's instruction decode PLA. The three indicated transistors match opcode pattern XX100XXX, indicating an AND instruction.

The diagram above shows part of the instruction decode circuit. The instruction bits (and their complements) are on yellow polysilicon wires running vertically through the circuit. Each row matches a bit pattern, with a transistor connected to each instruction bit to be matched. (The doped silicon regions forming transistors are the black outlines. Circles are connections between a transistor and the row's metal line.) For example, the three transistors marked with arrows match bit 3 low, bit 4 low, and bit 5 high, detecting the AND instruction pattern. Thus, the processor uses the grid of transistors in the instruction decoder to determine the meaning of each instruction.

Loose ends: Subtraction and rotating

The ALU implements a Sum operation, so you might wonder how subtraction is implemented. By using two's complement arithmetic, the CPU can perform subtraction by simply flipping all the bits on a value and then adding it. The ALU uses two temporary registers to hold the two operands since the ALU can't read the operands from the register file and write the result back simultaneously. One of the temporary registers has the feature that its value can be fed to the ALU directly or inverted. The subtraction instructions generate a signal causing the temporary register to provide the inverted value to the ALU, causing the ALU to perform subtraction.

One important operation in most processors is rotating or shifting the bits in a value, to the left or to the right. In most of the microprocessors I've examined, shifting is performed by the ALU.16 The 8008, on the other hand, implements the rotate logic in the register access circuit, on the opposite side of the chip from the ALU. When reading a register, the bits can be shifted one position left or right by a simple circuit before going onto the data bus.

History of the 8008

The Intel 8008 is important historically since it is the ancestor of the dominant Intel x86 architecture that you're probably using right now.2 I wrote a detailed article for the IEEE Spectrum on early microprocessor history, so I'll just give the outline of the 8008's complicated history here.

The 8008 copies the instruction set and architecture of the Datapoint 2200, a popular minicomputer introduced in 1970 as a programmable terminal.17 As was typical for minicomputers, the Datapoint 2200 contained a CPU build from individual TTL chips, filling up a circuit board. Datapoint contracted with both Intel and Texas Instruments to build a single-chip CPU that would replace this processor board, but keeping the same architecture and instruction set.

The Datapoint 2200 computer. The 8008 microprocessor was built to implement the Datapoint 2200's architecture and instruction set. Photo courtesy of Austin Roche.

The Datapoint 2200 computer. The 8008 microprocessor was built to implement the Datapoint 2200's architecture and instruction set. Photo courtesy of Austin Roche.

Texas Instruments was first to build a 2200-compatible microprocessor, creating the TMC 1795 chip. Intel got their version, the 8008, working a bit later, around the end of 1971. Datapoint rejected both processors, instead updating the Datapoint 2200 to use the 74181 TTL ALU chip. Texas Instruments couldn't find a new customer for the TMC 1795 and abandoned it. Intel, on the other hand, came up with the idea of selling the 8008 as a well-supported general-purpose processor. The 8008 led to the 8080, the 8085, 8086, and Intel's x86 line, which still retains some features of the 8008.

Conclusion

Although the 8008 was a very early microprocessor, its ALU was more advanced than you might expect. In particular, it used a complex carry-lookahead circuit for higher performance. Unfortunately, even with the carry-lookahead circuit, the 8008 was slower than the TTL-based Datapoint 2200 processor it was supposed to replace; addition took 20µs on the 8008, compared to 16µs on the original Datapoint 2200 and just 3.2µs on the upgraded Datapoint 2200. This illustrates the speed advantage that TTL had over MOS in the early 1970s. To us, a microprocessor may seem obviously better than a board of chips, but this wasn't always the case.

If you're interested in the 8008, my previous article has a detailed discussion of the architecture, more die photos and information on how to take them, and information on semiconductor history, so take a look.

I announce my latest blog posts on Twitter, so follow me at kenshirriff. I also have an RSS feed.

Notes and references

  1. The 8008 chip was publicly announced in an article in Electronics on March 13, 1972, entitled "8-bit parallel processor offered on a single chip", offering the chips for $200 each. 

  2. If you're not using an x86 processor right now, you're probably using an ARM processor. Don't feel neglected, though, since I've reverse-engineered the ARM-1 too.  

  3. Using a carry look ahead circuit avoids the delay from a standard ripple-carry adder, where the carries propagate through the sum. The 8008's carry-lookahead is based on the Manchester carry chain, but with a separate carry chain for each carry, yielding the triangular structure you see on the die. For performance, the carry chain is implemented with dynamic logic, depending on wire capacitance, rather than with standard Boolean gates. The 74181 ALU chip in comparison, uses a different carry lookahead scheme implemented with standard logic. I plan to write more about the 8008's carry lookahead later. 

  4. The 8008 implements eight different arithmetic/logic functions: Add, Add with carry, Subtract, Subtract with borrow, AND, XOR, OR, and Compare.14 These are implemented in terms of the ALU's four basic operations. Subtraction is performed by inverting the second argument. The operations without carry/borrow clear the carry-in bit. Compare is simply a subtraction that doesn't store the result; it just sets the flags with the status. Thus, the four fundamental operations of the ALU are used to implement eight different arithmetic/logic operations. 

  5. Note that the 8008 uses PMOS transistors, rather than the faster NMOS transistors in later microprocessors such as the 8080, 6502 and Z80. If you're familiar with NMOS circuits, PMOS can be confusing since everything is backwards. PMOS transistors turn on if the gate is low, and typically pull the output high. Vdd in PMOS is negative, and "ground" is positive. The "pull-up resistor" in a PMOS gate pulls the output down. A PMOS NAND gate has transistors in parallel (compared to serial for an NMOS NAND gate). A PMOS NOR gate has transistors in serial (compared to parallel for an NMOS NOR gate). 

  6. The metal layer of the chip is protected by silicon dioxide passivation layer. The professional way to remove this layer is with dangerous hydrofluoric acid. Instead, I used Armour Etch glass etching cream, which is slightly safer and can be obtained at craft stores. I applied the etching cream to the die and wiped it for four minutes with a Q-tip. (Since the cream is designed for frosting glass, it only etches in spots. It must be moved around to obtain a uniform etch.) After this, I soaked the die in hydrochloric acid (pool acid from the hardware store) overnight to dissolve the metal. This was probably too long, since the edges of the polysilicon were eaten away in places. 

  7. The following values are used for the three mode lines to select the ALU function:

    Operationm1m2m3
    Sum111
    And010
    Or100
    Xor110
     
  8. A more straightforward way of generating the sum bit is by xoring the three inputs: a⊕b⊕c. Unfortunately, an XOR gate is relatively difficult to implement with Boolean logic, so designers will often try to avoid XOR. 

  9. You might wonder why the OR operation is implemented with an AND gate, and vice versa. Since the inputs and the output of the OR gate are inverted, this is equivalent to an AND gate (by De Morgan's laws), and similarly for the AND gate. 

  10. Strictly speaking, the 4004 microprocessor has an AU (arithmetic unit), not an ALU (arithmetic/logic unit), since it doesn't do logical operations. Since the 4004 was designed for a calculator, logical operations weren't required. 

  11. The 8008's full adder generates the carry-out first, and generates the sum from that. In contrast, the typical full adder circuit combines two half adders to generate the sum and carry-out separately. If the typical full adder circuit had been used in the 8008, the carry-out logic could easily be omitted. 

  12. To see the similarity between the Z80's ALU circuit and the 8008's, you need to swap AND and OR gates. (Apply De Morgan's laws since the 8008's ALU inputs are inverted.) In the Z80, the carry-out comes from the ALU rather than a carry-lookahead circuit, so the control lines are somewhat different. But the fundamental ALU circuit is otherwise the same between the 8008 and Z80, which is not surprising since Federico Faggin worked on both chips. 

  13. Instruction decoding is based on a Programmable Logic Array (PLA), an arrangement of transistors that efficiently implements logic gates. These gates match bit patterns and generate the appropriate control signals for the rest of the chip. The 8008's PLA has 16 input lines flow vertically through the PLA. Each row in the PLA matches a bit pattern and generates a control signal output.

    In more detail, each row output line is pulled low by a load resistor/transistor to Vdd. The transistors are connected between the row line and Vcc (+5V). The bit lines are connected to the transistor's gate. If any bit line is low (indicating a mismatch), the PMOS transistor turns on, pulling the row line high. Thus, if there is no mismatch, the control line is low, and if there is a mismatch, the control line is high. In other words, each row is a NAND gate with instruction bit inputs.

    The input lines are ordered as follows: bit 3, bit 3 complement, 4, 4', 5, 5', 0, 0', 1, 1', 2, 2', 6, 6', 7, 7'. This order may seem strange, but there's a reason for it. In the 8008, the ALU operation is selected by bits 3, 4 and 5 of the instruction. By putting those bits on the left side of the PLA, they are closer to the ALU. Some rows of the PLA actually decode two instructions: bits 3, 4 and 5 are decoded on the left side, generating an ALU control signal, while the remaining bits are decoded on the right side generating a different control signal. This increases the PLA density and saves space on the chip. 

  14. The 8008's instruction set is designed around octal. Among other things, there are 8 ALU operations, 8 registers and 8 conditionals. In octal, the ALU instructions have the value 2ar, where a is the ALU operation to perform (0 through 7) and r is the register to use (0 through 7, where 7 indicates memory). The octal structure originates with the Datapoint 2200, which decoded instructions with TTL 7442 BCD chips that decoded groups of three bits. This octal structure persisted in descendants of the 8008, including the Z80 and x86. Unfortunately, these instruction sets are almost always presented in hexadecimal, which hides the underlying structure. 

  15. The instruction decoder generates all the signals required by the ALU. As described above, AND matches xx100xxx, pulling the m1 control signal low. An OR opcode has the bit pattern xx110xxx, which causes the instruction decode circuit to pull the m2 control line low. An XOR instruction has the bit pattern xx101xxx. The m3 control line is pulled low for patterns xx10xxxx or xx1x0xxx, matching AND, OR or XOR instructions. The subtract (with and without borrow) instructions match xx01xxxx, generating a signal that inverts the second argument. 

  16. Different processors use a variety of techniques for shifting. In the Z80, shifting is performed as data enters the ALU. The 6502 performs a left shift with "A plus A", and has a path inside the ALU for right shifts; the 8085 is similar. The ARM-1 has a barrel shifter next to the ALU that performs arbitrary shifts. 

  17. The instruction set of the Datapoint 2200 is described in the Reference Manual. The 8008 has a couple minor changes. For instance, the 8008 has increment and decrement instructions that are not present in the 2200. 

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ESP8266 LED lighting: QuinLED v2.6 PCB http://www.electronicsinfoline.com/pin/49352/ Wed, 08 Feb 2017 22:18:18 +0000 http://dangerousprototypes.com/blog/?p=93611

Pinned onto Dangerous Prototypes

Quindor designed and built an ESP8266 LED lighting QuinLED project with Dirty Board PCBs: It’s been a long time in the making but I’ve finally put the final touches on my newest revision of QuinLED! This makes it version 2.6 rev 1.00. Let’s check it out! This post is part of a series – The index for […]]]>
Switching LVDS Graphics in a Laptop Computer http://www.electronicsinfoline.com/pin/49347/ Wed, 08 Feb 2017 21:00:36 +0000 https://www.eeweb.com/design-articles/switching-lvds-graphics-in-a-laptop-computer/

Pinned onto EEWeb

Unlike desktop computers that have easily upgraded video graphics capabilities, laptops have historically been incapable of allowing such an up...]]>
Teleknitting: TV-based string art http://www.electronicsinfoline.com/pin/49338/ Wed, 08 Feb 2017 20:04:24 +0000 https://blog.arduino.cc/?p=16199

Pinned onto Arduino Blog

Have you ever wondered what television would look like if transposed onto string and wrapped around another object? If so, you’re not the only one, as shown in this teleknitting sculpture. Although it’s hard to say where the idea for this piece came from, Moscow-based artist ::vtol::’s teleknitting installation resolves a TV signal down into one […]]]>
DIY Bubble Machine http://www.electronicsinfoline.com/pin/49321/ Wed, 08 Feb 2017 12:33:00 +0000 http://www.freetronics.com.au/blogs/news/diy-bubble-machine

Pinned onto Freetronics

There is something highly satisfying about watching the awesome bubble machine belliedroot has created in action. The machine utilizes a number of servos to give the bubble “wand” panning and tilting capabilities so it can be dipped in bubble mixture and then moved in front of a fan which blows the bubbles out!

Bubble Machine

This project is a great way to learn about how servo motors work with Arduino, and make something cool in the process. To find out more about how you can build your own bubble machine checkout the following link or the video below

 

When you use motors in your Arduino project you will almost certainly need a H-Bridge motor driver. A H-Bridge allows you to easily control the direction of your motors from within your code. Our own Dual Channel H-Bridge Motor Driver Shield is a perfect solution to this problem, allowing you to drive two DC motors or a stepper motor.

H-Bridge

The Dual Channel H-Bridge Motor Driver Shield features PWM control, selectable current limits and a prototyping area to add your own parts. To find out more check out the Dual Channel H-Bridge Motor Driver Shield page.

To keep up to date with the latest news, projects, product announcements  and to let us know what you think of this project follow us on Facebook and Twitter.]]>
Start your day with Nerf target practice! http://www.electronicsinfoline.com/pin/49300/ Tue, 07 Feb 2017 21:07:49 +0000 https://blog.arduino.cc/?p=16194

Pinned onto Arduino Blog

If you need motivation to actually wake up rather than sleep more, this Nerf target clock from “Normal Universe” could be a great solution! For many of us, traditional alarm clocks have given way to smartphones, but the concept is still the same: an annoying sound, followed by either waking up, or hitting the virtual snooze […]]]>
Teardown of a Peaktech 6225A http://www.electronicsinfoline.com/pin/49307/ Tue, 07 Feb 2017 20:00:43 +0000 http://dangerousprototypes.com/blog/?p=93602

Pinned onto Dangerous Prototypes

Teardown and analysis of a Peaktech 6225A power supply from ElectroBob: I got a Peaktech 6225A power supply to power some things, as it seemed like a good deal, going beyond what one might find normally in these types of supplies: more display resolution and supposedly, lower noise. For this price, this supply is a good […]]]>
Door/Window alarm circuit http://www.electronicsinfoline.com/pin/49279/ Tue, 07 Feb 2017 15:49:19 +0000 http://www.gadgetronicx.com/?p=3037

Pinned onto Gadgetronicx

Door or Window alarm circuit have been used widely in many homes to detect intrusion. A simple search in internet might fetch you lot of alarms for you to buy. But making your own alarm will be something special and...
Read more

The post Door/Window alarm circuit appeared first on Gadgetronicx.

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Haptic game controller UnlimitedHand joins AtHeart! http://www.electronicsinfoline.com/pin/49268/ Tue, 07 Feb 2017 09:00:59 +0000 https://blog.arduino.cc/?p=15981

Pinned onto Arduino Blog

We are excited to announce that UnlimitedHand is now an officially licensed Arduino AtHeart product. Created by Japanese startup H2L, the wearable controller straps around your forearm like an Ace bandage and allows you to actually touch and feel things within the gaming world. UnlimitedHand consists of a 3D motion sensor, an array of muscle sensors, a multi-channel electronic […]]]>
Converting a coffee maker into a 3D printer http://www.electronicsinfoline.com/pin/49251/ Mon, 06 Feb 2017 21:35:57 +0000 https://blog.arduino.cc/?p=16186

Pinned onto Arduino Blog

Heavy duty coffee makers are good for, well, making coffee. On the other hand, if you were to look at the frame without the preconception of what it can do, you might notice that there is space on top where equipment could be attached, and space on the bottom with a built-in heating pad on […]]]>
HC 508 update http://www.electronicsinfoline.com/pin/49247/ Mon, 06 Feb 2017 20:35:08 +0000 http://dangerousprototypes.com/blog/?p=93596

Pinned onto Dangerous Prototypes

An update on mc68k’s HC508 project we covered previously: Good news, some components have arrived today, so I have completed a few 50 MHz boards. More details at Amiga projects blog.]]>
Timing Considerations When Using NVSRAM http://www.electronicsinfoline.com/pin/49255/ Mon, 06 Feb 2017 20:00:41 +0000 https://www.eeweb.com/design-articles/timing-considerations-when-using-nvsram/

Pinned onto EEWeb

Maxim's NVSRAM modules are constructed using a Maxim nonvolatile controller, a low-power CMOS static RAM memory component, and a lithium coin-cell battery. Under normal operating conditions, read or write operations are functionally identical to a stand-alone SRAM. Using the parallel I/O structure, a user can easily store data to, or fetch data from any memory location defined by the address bus width. Subsequent memory cycles can occur at this, or any other location in any order desired with no duty cycle or write cycle-count restrictions.

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Sort your M&Ms or Skittles with this ingenious machine http://www.electronicsinfoline.com/pin/49238/ Mon, 06 Feb 2017 16:22:35 +0000 https://blog.arduino.cc/?p=16181

Pinned onto Arduino Blog

Inspired by a YouTube video of another candy sorter, Willem Pennings decided to build his own version. After nearly eight months of work, he now has a device that can separate M&Ms or Skittles into their respective color dishes. Control is accomplished via a pair of Arduino Nano boards along with two EasyDrivers and an RGB sensor. […]]]>
Project Showcase: Impressive N-MOSFET Powered Artwork http://www.electronicsinfoline.com/pin/49219/ Mon, 06 Feb 2017 10:15:00 +0000 http://www.freetronics.com.au/blogs/news/project-showcase-impressive-n-mosfet-powered-artwork

Pinned onto Freetronics

At Freetronics we always love to see the amazing projects our customers create using our products. A few months ago we provided LOVOT LAB’s with a bunch of our N-MOSFET modules. We later found out that the modules were used to easily switch on and off a number of large, high powered LEDs for an art installation named “GRID I”. If this wasn't exciting enough, this project was located in South Korea!

GRID I with the projects creators

Fortunately, LOVOT LAB’s got back to us with some pictures and videos of the installation, the results are certainly spectacular! Don’t forget to checkout LOVOT LAB’s website to see more of the cool projects they have been working on.

 

Our Addressable Triple N-MOSFET driver / output module allow you to drive lots of different high powered loads using a single Arduino data pin. Effectively, our Addressable MOSFETs provide the same functionality as found in more common addressable LEDs such as our FreePixel, but can be used to drive any load you wish, not just an RGB LED. To find out more or to order visit the product page.

N-MOSFETs

To keep up to date with the latest news, projects, product announcements  and to let us know what you think of this project showcase follow us on Facebook and Twitter.

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How To Repair Electronics: Fixing My Drone http://www.electronicsinfoline.com/pin/49202/ Mon, 06 Feb 2017 03:29:50 +0000 http://www.build-electronic-circuits.com/?p=8595

Pinned onto Build Electronic Circuits

Because of a mistake made by yours truly, I decided to write about how to repair electronics. You see, I got a drone for Christmas this year. It was really windy outside that day. However, I was so excited to take it for a spin! I found a big open space, put my drone down […]

Copyright Build Electronic Circuits

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App note: Choose the right voltage regulator to extend battery life in wearables http://www.electronicsinfoline.com/pin/49164/ Sun, 05 Feb 2017 17:00:52 +0000 http://dangerousprototypes.com/blog/?p=93591

Pinned onto Dangerous Prototypes

App note from Maxim Integrated on wearable devices demanding reduced quiescent and shut down currents when in idle and in sleep mode in a voltage regulator. Link here Wearable devices have emerged as the next big market opportunity in the electronics industry. Smart watches are among the most popular wearable items today. The healthcare market, […]]]>
App note: Voltage reference long-term stability reduces industrial process control calibration costs http://www.electronicsinfoline.com/pin/49154/ Sun, 05 Feb 2017 13:00:07 +0000 http://dangerousprototypes.com/blog/?p=93588

Pinned onto Dangerous Prototypes

Application note from Maxim Integrated about improved long term stability of their voltage references. Link here (PDF) Large industrial plants such as those in the oil, gas, electricity, pharmaceutical, and food and beverage industries rely on electronic instrumentation to provide accurate, stable measurements to control their processes. The stability of an instrument very much depends […]]]>
Star Trek control panel http://www.electronicsinfoline.com/pin/49126/ Sun, 05 Feb 2017 12:15:49 +0000 http://abzman2k.wordpress.com/?p=2168

Pinned onto Techie Blog

This is one of those things that starts out as ridiculous but just might work.  We’re putting in a door at our hackerspace, a pocket door, so obviously it has to be pneumatic.  I was asked how to control this door, and I had one answer: Star Trek Electronic Door Chime Think Geek wants $30, Ebay wants […]]]>
mini-sucker (gravity sucker) http://www.electronicsinfoline.com/pin/49117/ Sun, 05 Feb 2017 09:04:40 +0000 http://abzman2k.wordpress.com/?p=2036

Pinned onto Techie Blog

This past weekend (this post has been in the queue for a while…) there was the Ferndale Pig and Whiskey Festival.  I spend a lot of time at i3Detroit and was convinced to help out at this event. We have a large device aptly named the moneysucker as it consists mostly of a water cooler […]]]>
A look at the Neopixel: Controller die teardown http://www.electronicsinfoline.com/pin/49110/ Sun, 05 Feb 2017 05:00:46 +0000 http://dangerousprototypes.com/blog/?p=93582

Pinned onto Dangerous Prototypes

A look at the Neopixel from Electronupdate: A WorldSemi WS2812B, a.k.a. “NeoPixel”.  This little device can be easily controlled by a Arduino and can be used in all sorts of neat things.  More details, and a truly excellent Arduino Library may be found at Adafruit. Three LEDs and a controller bonded into a single package.  Let’s take […]]]>
Skill Sunday: Power Monitoring http://www.electronicsinfoline.com/pin/49099/ Sat, 04 Feb 2017 22:45:00 +0000 http://www.freetronics.com.au/blogs/news/skill-sunday-power-monitoring

Pinned onto Freetronics

Using a Clipsal Cent-A-Meter you can effectively monitor the power usage of different appliances. This is great, however the built in functionality can be rather limiting. You can not, for example track the power consumption of a device over time. Thankfully, combining this meter with Arduino can allow you to reach the power meters full potential!  Specifically, a 433MHz receiver can provide a communication bridge between the power monitoring system and an Ethernet connected Arduino allowing the power meter’s data to be sent into a SQL database for analysis and tracking. To find out more about this hack checkout the following link.   

Power Meter

If you're looking to work with your own RF wireless hardware, but don't want to make your own receiver circuit - check out our range of  315/433 MHz receiver shields:

Receiver

Apart from being idea for working with the various low-cost data links on the market, the shield can also be used to capture wireless weather station data, as described in the book "Practical Arduino". For more information and ideas, check out the product page.

To keep up to date with the latest news, projects, product announcements  and to let us know what you think of this project follow us on Facebook and Twitter.

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10 Best and Free Online Audio Editor http://www.electronicsinfoline.com/pin/48992/ Sat, 04 Feb 2017 14:43:28 +0000 http://www.electronicsinfoline.com/?p=48992

Pinned onto Articles

Audio editors are to audio files as text editors and word processors are to text.  Professional audio editing software would prove to be expensive and overwhelming to a common user, who needs to do just basic editing jobs like cutting, trimming and joining his personal audio files.  In such cases, free online audio editors prove […]]]>
Two-Phase Digital Power Factor Correction http://www.electronicsinfoline.com/pin/49066/ Sat, 04 Feb 2017 14:00:12 +0000 https://www.eeweb.com/project/design_library/two-phase-digital-power-factor-correction

Pinned onto EEWeb

This High Power Two-Phase Digital Power Factor Correction reference design builds upon IXYS Corporation’s Digital Power Control technology and extends it to high power levels in the area of Power Factor Correction (PFC). It introduces fast switching, high current, high voltage X2-class MOSFETs and incorporates Digital Inrush Current Control concepts. Functional control is based upon Zilog’s 8-bit Z8F6481 microcontroller, a member of the Z8 Encore! XP F6482 Series of MCUs.

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A Modular is Born http://www.electronicsinfoline.com/pin/49041/ Sat, 04 Feb 2017 09:59:00 +0000 http://www.electronicsinfoline.com/?guid=b3c04f92db18f7f0bb0c9918300df085

Pinned onto Shack Nasties

I should 'fess up'. I've been having a ball. I've been neglectful of the radio arts whilst working up my recent experiments with analog synthesizer elements into something more permanent.In fact, you caught a glimpse of some of my synth modules on stri...]]>
The Hunt is both a playful game and tasteful home decor http://www.electronicsinfoline.com/pin/48914/ Thu, 02 Feb 2017 21:50:20 +0000 https://blog.arduino.cc/?p=16176

Pinned onto Arduino Blog

Carlos Rodriguez–who not only happens to be an Arduino team member but also a Masters student at Malmö University’s K3 school–has shared with us a project that he and a group of his interaction design classmates have created.  For the outsider, The Hunt is an Arduino-based light board; a piece of decoration in a tasteful home. Its six carefully crafted boxes are […]]]>
4-20ma panel meter teardown http://www.electronicsinfoline.com/pin/48897/ Thu, 02 Feb 2017 15:24:46 +0000 http://dangerousprototypes.com/blog/?p=93573

Pinned onto Dangerous Prototypes

Teardown of a 4-20ma panel meter from SteelCity Electronics: Below is a panel meter that has been used in some sort of industrial process. It was manufactured in 1980 and I’m not quite sure who the manufacturer was – the company’s logo is not easy to read but it might say, “Aumano”. What caught my attention with […]]]>
DIY Heng Lamp http://www.electronicsinfoline.com/pin/48890/ Thu, 02 Feb 2017 10:16:00 +0000 http://dangerousprototypes.com/blog/?p=93568

Pinned onto Dangerous Prototypes

Martin Raynsford shared detailed instructions of how to make a DIY Heng Lamp,  project instructables here: The HENG Balance lamp just successfully funded on Kickstarter, the design is pretty cool and unique so we decided to make a copy of it. At it’s heart it’s just an LED lamp with a simple micro switch to turn it on […]]]>
The Rick and Morty Alarm will make sure you’re always on time http://www.electronicsinfoline.com/pin/48862/ Wed, 01 Feb 2017 22:22:21 +0000 https://blog.arduino.cc/?p=16171

Pinned onto Arduino Blog

Mike, CEO of the Useless Duck Company, recently got sidetracked playing computer games. After receiving a notification on his phone, he realized that he had lost track of the time and was late to a very important meeting. Being the Maker that he is, he decided to invent a system that would prevent this from happening again. Introducing the Rick and Morty Alarm. […]]]>
Secrets to Homebrewing ~ Revealed! http://www.electronicsinfoline.com/pin/48851/ Wed, 01 Feb 2017 19:49:00 +0000 http://www.electronicsinfoline.com/?guid=3ace3521b4c5fbebcdcf69d00388daa8

Pinned onto N6QW

Secrets to Successful Homebrewing -- An Art!Many years ago there was a joke going around about the person who widely advertised "Become Rich Quick!" Send $2 and discover how. As the story goes a reply would be received in the form of a postcard ( ...]]>
Build your own MIDI accordion with Arduino http://www.electronicsinfoline.com/pin/48841/ Wed, 01 Feb 2017 16:13:05 +0000 https://blog.arduino.cc/?p=16166

Pinned onto Arduino Blog

If you want to play accordion via a MIDI interface, manufacturers such as Roland do make such a device. The downside is that they tend to be fairly expensive, as one would have to assume they are something of a specialty item. Conversely, if you are able to get your hands on an accordion whose […]]]>
3D Printed LeoStick Powered Robot http://www.electronicsinfoline.com/pin/48822/ Wed, 01 Feb 2017 10:43:00 +0000 http://www.freetronics.com.au/blogs/news/3d-printed-leostick-powered-robot

Pinned onto Freetronics

YouTuber Jaidyn Edwards has created a 3D printed two legged robot. If this wasn’t cool enough, the brain of this robot is the Freetronics LeoStick. Jaidyn’s robot is based of “BOB” an easy to make robot designed by Thingsverse user k120189.

BOB: The easy to build 3D printed robot

You can find full instructions on how to make the robot at the following link, and a video of Jaidyn’s robot in action below!

So what is a LeoStick? It's the Arduino Leonardo-compatible board that's cheaper and smaller than the original:

LeoStick

 Apart from being one of the smallest Arduino-compatibles on the market with USB, it also has an onboard RGB LED and piezo which can be used a knock sensor and various tune and sound effects. Plus you can add extra circuitry with the matching protostick! For more information and to order, click here.

To keep up to date with the latest news, projects, product announcements  and to let us know what you think of this project follow us on Facebook and Twitter.

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A tiny orchestra of Lego Robots driven by Arduino http://www.electronicsinfoline.com/pin/48769/ Tue, 31 Jan 2017 15:52:26 +0000 https://blog.arduino.cc/?p=16161

Pinned onto Arduino Blog

By now, you are probably familiar with the Toa Mata Band–the world’s first LEGO robotic band controlled by Arduino Uno, which is hooked up to a MIDI sequencer. Now a few years since Toa Mata Band’s debut, Italian producer Giuseppe Acito has shared the group’s latest music video: a cover of Kraftwerk’s “The Robots.” As you can see below, Acito himself performs the 1978 track’s […]]]>
PSU burner http://www.electronicsinfoline.com/pin/48755/ Tue, 31 Jan 2017 04:18:15 +0000 http://dangerousprototypes.com/blog/?p=93559

Pinned onto Dangerous Prototypes

Bob writes: What does one do when designing a power supply? Well, build a power supply tester, of course. One of the simplest things to build is a constant current load. This will allow for testing of the endurance of the power supply, as most of the designs out there are using slow components. However, […]]]>
Guitar Hero: Flamethrower Edition! http://www.electronicsinfoline.com/pin/48718/ Mon, 30 Jan 2017 04:27:00 +0000 http://www.freetronics.com.au/blogs/news/guitar-hero-flamethrower-edition

Pinned onto Freetronics

Although the popular Guitar Hero console game is already pretty cool, instructables member oswaldonfire has stayed true to his name by modifying his Guitar Hero game so that a set of flamethrowers is triggered with each in game button press. The result is nothing short of spectacular!

Flamethrower

The project is entirely controlled by an Arduino Uno and a number of relays which trigger the flamethrowers. If you want to find out more about how you can build this awesome project yourself checkout the following link or the video (the action starts at around 10 seconds) of the setup in action!

 

If you are thinking about getting started with Arduino, but don’t know where to get started, our Experimenter’s Kit is a great way to learn the basics.

Experimenter's Kit

The kit includes a wide range of parts including a servo, sensors, lights, buttons, a sound module and more. Importantly, a Freetronics Eleven Arduino-compatible board is included to ensure that the kit contains everything you need to get started with Arduino. All these great parts would be useless without some form of instructions which is why we have developed a comprehensive project and instruction booklet to get you started. Check out the product page to find out more.

Working on a cool project you think we should know about? Inspired to start making your own Flamethrower Edition of Guitar Hero? Let us know in the comments section below or on Facebook and Twitter.  

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App note: Designing reliable drones using proper circuit protection http://www.electronicsinfoline.com/pin/48671/ Sun, 29 Jan 2017 17:00:23 +0000 http://dangerousprototypes.com/blog/?p=93552

Pinned onto Dangerous Prototypes

Littelfuse’s application note on drone circuitry protection, offering guard against overcharging its batteries, I/O and ESD protection. Link here (PDF) No doubt “pilot losing control” is behind many drone incidents and crashes. But what’s behind that “loss of control?” After all, even small recreational drones depend on a host of subsystems – GPS, receiver antennae, […]]]>
8-bit Frogger game on a digital microfluidics device http://www.electronicsinfoline.com/pin/48743/ Sun, 29 Jan 2017 14:17:32 +0000 https://blog.arduino.cc/?p=16135

Pinned onto Arduino Blog

OpenDrop V2 is an updated design for an open-source digital microfludics platform, which was initiated by GaudiLabs in Luzern, Switzerland and developed in collaboration with several communities including hackteria | open source biological art, BioFlux and digi.bio. The device is part of a much larger ecosystem focused around digital biology with hopes of making personal lab automation accessible to everyone. OpenDrop runs on […]]]>
Standalone Inductance Meter on a Etched Board http://www.electronicsinfoline.com/pin/48262/ Sun, 29 Jan 2017 12:16:19 +0000 https://soldernerd.com/?p=2092

Pinned onto Soldernerd

In late 2014 and early 2015 I had posted a short series on an inductance meter project. The first post in that series described an Arduino shield that allowed an Arduino UNO to do inductance measurements and got this blog mentioned on dangerousprototypes.com for the very first time. I got a lot of encouraging feedback … Continue reading Standalone Inductance Meter on a Etched Board ]]>
Twelve Best Graphics Cards of 2017 – from High end to Budget friendly http://www.electronicsinfoline.com/pin/48082/ Sun, 29 Jan 2017 09:10:41 +0000 http://www.electronicsinfoline.com/?p=48082

Pinned onto Articles

Nvidia and AMD are the top two graphics card designing companies in the world. With the launch of the 10x series, Nvidia has gained significant shares in the market. The 10x series is based on Nvidia’s Pascal architecture that provides twice the performance as compared to the previous family, with only half the power consumption. […]]]>
App note: Simple Switcher PCB layout guidelines http://www.electronicsinfoline.com/pin/48069/ Sun, 29 Jan 2017 00:03:40 +0000 http://dangerousprototypes.com/blog/?p=93544

Pinned onto Dangerous Prototypes

Simple Switcher PCB layout guidelines from Texas Instruments, app note here (PDF!) One problem with writing an application report on PCB layout is that the people who read it are usually not the ones who are going to use it. Even if the designer has struggled through electromagnetic fields, EMC, EMI, board parasitics, transmission line […]]]>
ZMOTION Occupancy Sensor http://www.electronicsinfoline.com/pin/48710/ Sat, 28 Jan 2017 14:00:04 +0000 https://www.eeweb.com/project/design_library/zmotion-occupancy-sensor

Pinned onto EEWeb

This ZMOTION Occupancy Sensor reference design demonstrates the use of Zilog’s ZMOTION microcontroller and key IXYS components as a passive infrared (PIR) sensorbased motion detector lighting system that can operate in two modes – Occupancy Mode and Vacancy Mode. Both modes can use either PWM or 1–10 V interfaces to control dimmable lighting ballasts. These ballasts typically drive fluorescent/compact fluorescent (CFL), High Intensity Discharge (HID), or High Power LED lighting. A DIP switch is used to select features and modes such as sensitivity, delay time, dim level, pass through mode, vacancy mode, and occupancy mode. Ambient light detection, AC power control, and certain advanced features offered by ZMOTION, such as Pass Through and Hyper sense, are also supported.

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Teardown, repair and experiments with a Tektronix RSA 6114A real-time spectrum analyzer http://www.electronicsinfoline.com/pin/48032/ Fri, 27 Jan 2017 23:09:11 +0000 http://dangerousprototypes.com/blog/?p=93534

Pinned onto Dangerous Prototypes

Tektronix RSA real-time spectrum analyzer teardown from The Signal Path: In this episode Shahriar attempts a difficult repair of a Tektronix RSA real-time spectrum analyzer. This well-equipped instrument reports several error messages during startup POST including LO Unlock as well as Signal Path failures. The service manual of the instrument does not provide any detailed […]]]>
A Single Chip Silicon Bipolar Receiver for GPS/GLONASS Applications http://www.electronicsinfoline.com/pin/48019/ Fri, 27 Jan 2017 18:30:07 +0000 https://www.eeweb.com/design-articles/a-single-chip-silicon-bipolar-receiver-for-gps-glonass-applications/

Pinned onto EEWeb

This paper describes a silicon bipolar ASIC design for high-end GPS receivers that delivers a reference frequency and IF outputs to allow for t...]]>
ESP8266: The JSON Streaming Parser http://www.electronicsinfoline.com/pin/47966/ Fri, 27 Jan 2017 07:00:23 +0000 https://blog.squix.org/?p=1760

Pinned onto Squix Techblog

You might not know it but the most important puzzle piece for all my recent ESP8266 projects is a thing called a streaming parser. Keep reading if you want to know what that is, how it works and why it is so important for my ESP8266 projects. What is a streaming parser? What is a parser ...

Read More

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Portable USB Charger Circuit http://www.electronicsinfoline.com/pin/47962/ Fri, 27 Jan 2017 06:14:33 +0000 http://www.build-electronic-circuits.com/?p=8320

Pinned onto Build Electronic Circuits

Build this portable USB charger circuit, and you’ll always have access to a charger. Imagine a beautiful summer day. You’re on you way to meet friends for a picnic in the park. But, the park is huge and full of people. Since you don’t know where exactly your friends are, you pick up your phone […]

Copyright Build Electronic Circuits

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Remapcro: A hardware keyboard macro recorder http://www.electronicsinfoline.com/pin/47942/ Fri, 27 Jan 2017 00:11:14 +0000 http://dangerousprototypes.com/blog/?p=93524

Pinned onto Dangerous Prototypes

Anthony Lieuallen has published new build, a hardware keyboard macro recorder: Remapcro I posted once recently about the prototype of this project, but as of today I’ve finished the first real one. The name Remapcro is a portmanteau of remap and macro, because that’s what it does. It’s an array of extra keys onto which macros can be […]]]>
An A/B battery replacement for the Zenith TransOceanic H-500 radio with filament regulation http://www.electronicsinfoline.com/pin/47943/ Thu, 26 Jan 2017 23:40:38 +0000 http://dangerousprototypes.com/blog/?p=93516

Pinned onto Dangerous Prototypes

KA7OEI built a battery pack to replace the obsolete “A/B” battery for Zenith TransOceanic (ZTO) H-500 and wrote a post on his blog detailing its assembly: There are several things that I decided that this voltage converter should do: Automatically power up and shut down when the radio is turned on and then off Cause […]]]>
How to chose Best Graphics Card for your PC – How much Processing Power do you really need? http://www.electronicsinfoline.com/pin/47902/ Thu, 26 Jan 2017 16:23:55 +0000 http://www.electronicsinfoline.com/?p=47902

Pinned onto Articles

So we all use Graphics Card – right? In fact your computer, be it your old desktop or modern age ultrabook or tablet – or even your mobile phone – they won’t run without a graphics processor. It is the part of the whole system that drives the display. We all know this. But in […]]]>
Twitter Mood Light http://www.electronicsinfoline.com/pin/47915/ Thu, 26 Jan 2017 13:15:00 +0000 http://www.freetronics.com.au/blogs/news/twitter-mood-light

Pinned onto Freetronics

This cool project displays the collective “feeling” of the entire twitter world in a multicoloured mood light.  The mood light constantly monitors twitter and aggregates the tweets based on emotional content to determine a world wide mood. Once the mood has been determined it is displayed in the mood light with different colours indicating different moods. This is a great way to quickly find out if a significant event has happened. To get started with this unique project checkout the following link.

Green indicates that the world is happy!

If you are looking for an RGB LED to use in this project why not checkout our FreePixel, a colour LED with a brain! The FreePizel includes a bright WS2812B addressable RGB LED and can be daisy-chained, so you can connect a number of these together in a string and drive each of the module colours individually from your microcontroller. Best of all these diverse modules are great value at only $3! To order or find out more checkout the following link

FreePixel

To keep up to date with the latest news, projects, product announcements  and to let us know what you think of this project follow us on Facebook and Twitter.]]>
Reel to reel tape cleaner http://www.electronicsinfoline.com/pin/47879/ Thu, 26 Jan 2017 02:02:00 +0000 http://www.electronicsinfoline.com/?guid=d9274f7d0ead4ba127686886133e52ac

Pinned onto Dilshan R Jayakody

Due to advancement of audio technologies reel to reel audio tapes are now classified as a rare item. The biggest problem with the reel to reel tapes are fungus. Fungus are developed on old unused tapes due to humidity exposure. Also another problem with old tapes is that the lubrication on the surface of the tape starts to deteriorate and tape starts to stick to itself, and this leads tape to break during the playback. Most of the that have Fungus can be fixed by using tape cleaner. But these days reel to reel tape cleaners are not available to buy and because of that we decided to build simple tape cleaner by using parts of old reel to reel tape players.

The core component of this player is an induction motor which we got from an old reel to reel player. The motor which we used in this project is Sony HC-134. HC-134 is 100V single-phase, capacitor run, induction motor with 1500 - 1800 RPM. Recommended auxiliary winding capacitor for this motor is 1.5μF. To deliver 100V AC to motor we use 3A, 230V to 100V step down transformer.

Final view of the reel to reel tape cleaner.

Casing and most of the parts of this cleaner is made by using 5mm transparent acrylic sheets. Size of the casing which we made for this cleaner is 300mm × 100mm × 215mm.

To clean 360m long (polyester) tape this cleaner takes 4 to 5min.

Tape before and after cleanup with the cleaner.

High resolution photographs of this reel to reel tape cleaner are available at my flickr.com page.
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An experimental game with a conductive rubber band controller http://www.electronicsinfoline.com/pin/47864/ Wed, 25 Jan 2017 21:23:08 +0000 https://blog.arduino.cc/?p=16128

Pinned onto Arduino Blog

RubberArms is an experimental rubber band game, created by Robin Baumgarten at the Global Game Jam 2017 in Yverdon-les-Bains, Switzerland. The controller uses a conductive rubber cord from Adafruit that changes resistance as it’s stretched. This resistance is measured by an Arduino Micro/Leonardo (or a Teensy 3.2), which acts as a USB joystick sending signals to Unity3D. (The game is coded […]]]>
MIPI D-PHY Solution with Passive Resistor Networks in Altera Low Cost FPGA http://www.electronicsinfoline.com/pin/47855/ Wed, 25 Jan 2017 21:00:04 +0000 https://www.eeweb.com/design-articles/mipi-d-phy-solution-with-passive-resistor-networks-in-altera-low-cost-fpga/

Pinned onto EEWeb

The Mobile Industry Processor Interface (MIPI) is an industry consortium specifying high-speed serial interface solutions to interconnect betwe...]]>
The Soda Locker http://www.electronicsinfoline.com/pin/47849/ Wed, 25 Jan 2017 19:51:18 +0000 https://blog.arduino.cc/?p=16123

Pinned onto Arduino Blog

With books being replaced by electronic alternatives and sugary drinks in short supply, this custom locker has come to the rescue. After a conversation with a few friends about an idea he had for a vending machine that fit entirely inside of a locker, high school student Blake Hawkins decided to actually make it a reality. His […]]]>
A high current power supply built around a server voltage regulator http://www.electronicsinfoline.com/pin/47835/ Wed, 25 Jan 2017 15:12:34 +0000 http://dangerousprototypes.com/blog/?p=93507

Pinned onto Dangerous Prototypes

Andy Brown designed and built a power supply controller board for the Artesyn NXA66: I decided that the best way to exploit the results of the reverse engineering effort was to design a controller board that would host the NXA66 and expose its functionality via a front panel. I’d throw in a few simple extras […]]]>
Join Arduino Education at Bett 2017 http://www.electronicsinfoline.com/pin/47817/ Wed, 25 Jan 2017 03:33:52 +0000 https://blog.arduino.cc/?p=16113

Pinned onto Arduino Blog

Arduino Education is a worldwide-leading school initiative bringing technology into the hands of teachers and students to create a more inventive learning environment. Arduino will be exhibiting Creative Technologies in the Classroom 101 (CTC 101), the latest addition to its one-of-a-kind STEAM program, at Bett 2017, held January 25-28 in London. CTC 101 is a […]]]>
Build an automatic cat treat dispenser with Hummingbird http://www.electronicsinfoline.com/pin/47884/ Tue, 24 Jan 2017 23:06:41 +0000 https://blog.arduino.cc/?p=16088

Pinned onto Arduino Blog

The Hummingbird by BirdBrain Technologies is an Arduino AtHeart microcontroller designed to enable beginners to create robots from craft materials. Hummingbird kits include LEDs, motors, and sensors that connect directly to the board. This eliminates the need for soldering or breadboarding and ensures that users have the parts they need to build their first robots. […]]]>
uArm Swift is an open-source robotic assistant for your desktop http://www.electronicsinfoline.com/pin/47807/ Tue, 24 Jan 2017 22:10:07 +0000 https://blog.arduino.cc/?p=16108

Pinned onto Arduino Blog

Need a hand? The UFACTORY team has got you covered with the uArm Swift, an open-source robotic assistant for your desktop. The four-axis uArm Swift is a smaller and sleeker version of the company’s original device from 2014. Based on an Arduino Mega, the robot is capable of lifting 500 grams (1.1 pounds) with a working range of 5 to 32 centimeters (2 to 12.6 […]]]>
Make your reflex punching bag interactive with Arduino http://www.electronicsinfoline.com/pin/47803/ Tue, 24 Jan 2017 20:26:03 +0000 https://blog.arduino.cc/?p=16104

Pinned onto Arduino Blog

A traditional reflex bag is meant to help improve your punch accuracy and timing. However, Carl Gordon decided to make his a bit more interactive and gamified using an Arduino Uno. As you can see in the video below, his setup adds four LEDs to the device to tell the user which side of the bag to punch, […]]]>
DIY thermal imaging http://www.electronicsinfoline.com/pin/47777/ Tue, 24 Jan 2017 15:30:53 +0000 http://dangerousprototypes.com/blog/?p=93503

Pinned onto Dangerous Prototypes

Niklas Roy has written an article detailing his DIY thermal imaging with an IR thermometer: I did not want to hack/destroy the brand new thermometer, as I still plan to use it in its original form later. For that reason, I decided to temporarily attach an old webcam to its back. This way, my laptop can read […]]]>
Teardown, experiments and calibration of an Ist-Rees laser spectrum analyzer http://www.electronicsinfoline.com/pin/47700/ Tue, 24 Jan 2017 14:30:39 +0000 http://dangerousprototypes.com/blog/?p=93493

Pinned onto Dangerous Prototypes

Ist-Rees laser spectrum analyzer teardown from The Signal Path: In this short episode Shahriar takes a close look at an Ist-Rees laser spectrum analyzer. This simple instrument is based on a continuously rotating diffraction mirror to detect various wavelengths. A trigger signal is used to denote the beginning of the scan and the front-panel display shows […]]]>
IR thermometer hacked into an IR camera http://www.electronicsinfoline.com/pin/47704/ Tue, 24 Jan 2017 14:19:19 +0000 https://blog.arduino.cc/?p=16100

Pinned onto Arduino Blog

Using several clever hacking techniques, Niklas Roy can make thermal images using a “simple” thermometer. True IR (infrared) cameras are still too expensive for many of us, but if you’d just like to know the temperature of something at a distance, IR thermometers aren’t that costly. In theory, if you were to take readings in […]]]>
Real Time Planet Tracking System http://www.electronicsinfoline.com/pin/47696/ Tue, 24 Jan 2017 11:44:00 +0000 http://www.freetronics.com.au/blogs/news/real-time-planet-tracking-system

Pinned onto Freetronics

Whether you are looking for a guide of where to point your telescope or just have a fascination for our solar system this project is definitely for you. Shubham Paul has put together a great realtime planet tracking system. Although the hardware on this project is fairly simple consisting of an Arduino, GPS module and servo, the algorithms that calculate the approximation of a planet's position using Kepler's laws are particularly impressive.  To find out more about how you can build your own real time planet tracker checkout the following link.  

Planet Tracking

 

The EtherMega is a greatfully-loaded” Arduino-compatible board. Apart from being completely Arduino Mega2560-compatible, it includes a full Ethernet interface, a microSD card socket, full USB interface, optional Power-over-Ethernet support and still has a circuit prototyping area with extra I2C interface pins. So if your project is breaking the limits, upgrade to the EtherMega today.

EtherMega

To keep up to date with the latest news, projects, product announcements  and to let us know what you think of this project follow us on Facebook and Twitter.]]>
Bookcase automatically opens to reveal secret lair http://www.electronicsinfoline.com/pin/47682/ Mon, 23 Jan 2017 21:33:09 +0000 https://blog.arduino.cc/?p=16082

Pinned onto Arduino Blog

A secret lair isn’t much fun if it’s a pain to get into, so Instructables user SPECTREcat decided to automate his hidden doors using an Arduino Uno. This drives four linear actuators via a MultiMoto shield, which both pull and turn the bookshelf in such a way that the books stay in place. When opening, […]]]>
PCI Express High Performance Reference Design http://www.electronicsinfoline.com/pin/47678/ Mon, 23 Jan 2017 20:00:48 +0000 https://www.eeweb.com/design-articles/pci-express-high-performance-reference-design/

Pinned onto EEWeb

This document highlights the performance of the Altera’s PCI Express® products. The design includes a high-performance chaining direct memory access (DMA) that transfers data between the a PCIe Endpoint in the FPGA, internal memory and the system memory. The reference design includes a Windows-based software application that sets up the DMA transfers. The software application also measures and displays the performance achieved for the transfers.

Altera offers the IP Compiler for PCI Express IP core in both hard IP and soft IP implementations, and the Arria V, Arria 10, Cyclone V, and Stratix V Hard IP for PCI Express in hard IP. The hard IP implementation is available as a Root Port or Endpoint. Depending on the device used, the hard IP implementation is compliant with PCI Express Base Specification 1.1, 2.0, or 3.0. The soft IP implementa‐ tion is available only as an Endpoint. It is compliant with PCI Express Base Specification 1.0a or 1.1.

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Muxtronics open source 12V powerbank http://www.electronicsinfoline.com/pin/47653/ Mon, 23 Jan 2017 15:17:20 +0000 http://dangerousprototypes.com/blog/?p=93488

Pinned onto Dangerous Prototypes

A custom 12V powerbank for Cube i7 Stylus from Muxtronics: Why would anyone even try to build a power bank – i.e. an external battery for charging mobile devices – these days? These things are commodity, it’s impossible to compete. Right? Well, that is until you find out that the type of power bank for your […]]]>
TI’s Little Professor http://www.electronicsinfoline.com/pin/47655/ Mon, 23 Jan 2017 14:17:14 +0000 http://dangerousprototypes.com/blog/?p=93483

Pinned onto Dangerous Prototypes

A teardown of TI’s Little Professor vintage calculator from KuzyaTech: This thing was sold for parts and repair since the seller did not think it was working. As it turned out, everything worked just fine, but not in an expected way. This is not your typical calculator, but rather a teaching one. More details at KuzyaTech.com.]]>
How to use a Digital Multimeter effectively – Some Tips and Tricks http://www.electronicsinfoline.com/pin/47326/ Mon, 23 Jan 2017 05:57:22 +0000 http://www.electronicsinfoline.com/?p=47326

Pinned onto Articles

Introduction   A digital multimeter is the handiest tool for an electronics engineer, and to be successful in the industry, it is essential to be well versed in the functioning and usage of this tool. A digital multimeter is a lightweight, battery-operated device that can be used for measuring a variety of electrical values in […]]]>
App note: Testing inductors at application frequencies http://www.electronicsinfoline.com/pin/47295/ Sun, 22 Jan 2017 17:00:33 +0000 http://dangerousprototypes.com/blog/?p=93472

Pinned onto Dangerous Prototypes

An app note from Coilcraft on inductance and Q parameters which are the important factors of an inductor and how these values are found. Link here (PDF) The accurate measurement of an inductor has always been more difficult than the measurement of other passive components. The primary difficulty with coil measurements lies in the fact […]]]>
1968 Princeton Reverb Repairs http://www.electronicsinfoline.com/pin/47253/ Sun, 22 Jan 2017 06:25:00 +0000 http://www.electronicsinfoline.com/?guid=39c8e9645828ac2ba01d69db7c912069

Pinned onto QRPHB

1968 Princeton Reverb Repairs — A reprised post from my old QRP HomeBuilder website


This somewhat rare 1968 silver face Princeton Reverb had aluminum trim surrounding the grill cloth. We verified its age by the output transformer code, the trim and by serial number. This particular amp ran a GZ34 rectifier in the rectifier tube socket.

Boy, it sounded terrible!  According to the owner, it sat in a closet for 15 years; but prior to that, some teenagers had borrowed it to "rock it hard", but brought it back and stated that it did not sound very good. After replacing 4 tubes, the power supply capacitors, the bias capacitor, a B+ chain resistor, and the speaker --- this amp sounded pleasant once again.

During physical examination and testing, I found the following problems:

  1. A 4 amp fuse was in the fuse socket
  2. Blown speaker
  3. There were 2 different brands of 6L6 tubes
  4. Loud hum, noise and microphonics in the AF chain
  5. The rectifier tube was audibly clinking and stinking
  6. Low AF output power
  7. The first 1K resistor on the B+ appeared to be temperature distorted
  8. I heard an approximately ~1 KHz intermittent oscillation

Above — Post CBS Princeton Reverb. The Princeton Reverb was essentially a poor man's Deluxe Reverb with a 10 inch speaker. Rated at  around 12 watts, it ran a much smaller output transformer and as a result, offered much less head room than the Deluxe Reverb. The tolex on this old amp looked in incredible shape. All it needed was a good cleaning.


Above — The look on our jazz cat's face says it all. This amp sounded terrible. He
demanded that I make repairs as soon as possible and return it to the owner.


Above — The chassis removed from the wood. The PR chassis proved very compact, lightweight and easy to work on.


Above — A view inside the chassis. This circuit and its schematic looked very much like the blackface pre-CBS version. A few newer, non-Fender parts gave evidence of previous repair(s). This can get scary. Fixing some else's bad repairs may open a Pandora's box. For this particular amp, the previous repairs seemed OK.


Above — The 4 main electrolytic B+ supply capacitors are housed inside 1 can
which is referred to  as a multiple section capacitor. This is the old multiple section capacitor. Note the heat disfigured 1K ohm resistor to the right of the capacitor. I removed it and measured 1K6 ohms.


Above — Removal of an old multi-section capacitor is never fun. I used an 80 watt soldering iron, solder wick and a flat screw driver to unlatch the anchoring tabs from the main chassis. After capacitor removal, the remaining solder was removed and I cleaned and buffed the local chassis area.
 

Above — The new multiple section capacitor. It's diameter measured 1 - 3/8 inches. This means obtaining a special part as modern cans are greater in diameter and won't fit in a vintage amp. I got this cap from Antique Electronic Supply. The number = C-EC20X4-475 and it's a 20/20/20/20 uF @ 475 VDC. Apparently they're manufactured on original Mallory equipment.


Above — The new multi-section capacitor is soldered in. I replaced the disfigured 1K resistor with a NOS version. It ran cool to touch during testing. For safety purpose, I palpated it immediately after the power was switched off and the high voltage was bled to ground. Nowadays, I measure temperature with an infrared thermometer.


Above — Replacing the bias capacitor removed the intermittent ~1 KHz oscillation and decreased hum. I only had an axial type on hand and it worked fine.



Above — The old and new 6V6 finals are shown. A matched set of Electro-Harmonix 6V6s were installed. I loved the sound of these Russian-built EH 6V6 offerings. I also put in a new, low-noise, Sovtek 12AX7a in the number 1 preamp tube socket. Further, a new Sovtek rectifier tube replaced the clanking old rectifier tube. The other tubes seemed OK.


Above — The old and new 10 inch speakers. The speaker choice was made to suit the owner. He wanted maximum head room and plays only clean guitar. I chose a Fender 099-4810-004. This speaker is actually made by Eminence, a company I like and whose products I have used on other projects. The new speaker sounds great and most importantly, pleases the owner. The old speaker cone and surround were cracked and separated. Further, the cone felt stiff + brittle --- and a new speaker proved the best way to go. Fender didn't put a great speaker in the PR to begin with.


Above —  A rear view of the final tested chassis back in the wood and connected to the new speaker.

Above —  The jazz cat now mesmerized by the sweet tone of the restored Princeton Reverb. The parts total ran about $200 and much of it arose from shipping/handling/duty and tax costs to Canada. The owner only wanted to spend a maximum of $200, so it felt good to come in on budget for a change.


Above — My bench back in 2008. I built and repaired many tube amps here.

WARNING

Tube amplifiers operate at high DC voltages. Repairing, modifying or building tube amps can be dangerous, or in some cases, fatal.


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More on Color TFT Displays ~ The Big Ones — 240 X 320 http://www.electronicsinfoline.com/pin/47234/ Sun, 22 Jan 2017 00:19:00 +0000 http://www.electronicsinfoline.com/?guid=bf497a04674ba340eed07cffa836e79a

Pinned onto N6QW

Really Big (bigger) Displays the 240 X 320 Color TFT

About two years ago I bought several of the 240 X 320 displays and immediately was struck by how much information can be displayed on the face of the unit and  like a choice of 256K colors. Lots of customization can be had here. Unlike the 128 x 128 or 128 X 160, which I used straight into the Arduino pins, these larger displays Do Not Like to see 5 VDC.
 
They like to see 3.3 VDC and typically a "Level Shifter" must be interjected between the 5 volt Arduino Pins and the pins on the display which like to see 3.3 VDC. So this is where I get emails about running the Arduino at 3.3 VDC and then no level shifting is required. Not sure my heart is that strong to do that. The literature abounds with tricks and tips to do the level shifting.
 
One method involves a series resistor combination of a 4.7K in series with a 10K (the 10K other end is at ground). Now to the high level math. If you ran 5 VDC through the 14.7K resistor( 4.7K + 10K) the current via ohms law would be 5/14.7K = .340 milliamp . Now a bit more math .340 milliamp flowing through 10K would be a voltage drop of 3.4 volt and the drop across the 4.7K would be 1.6 volts. So at the junction of the 4.7 K and 10K you would read 3.4 VDC. Thus one end of the 4.7K is connected to the Arduino pin the junction connection of the 4.7K and 10K is peeled off to the display and the other end of the 10K goes to ground. Instant level shifter. You would need 6 such combinations of 4.7K and 10K resistors.
 
Another way is to take an IC such as a hex buffer IC such as the CD4050 and by connecting 3.3 VDC to Pin 1 (Vdd) all inputs to the IC (six total) are outputted at 3.3 VDC. Many of the wing nut jobs hate this approach because it is not bi-directional. There are bi-directional level shifters but cost more than the nominal 50 cents for the CD4050. In my application I only need a single direction and that is a down shift. Below is the pin out for the CD4050
 
 
 
Here is the display and you will get a sense of the size with the ease of readability. Did I mention about the 256K color choices?
 
 

 
So now the problem is since the CD4050 level shifter will be used --how do you hook up the display? A glib answer would be carefully! Shown below is a hand sketch of the Nano ICSP and a decode of the pins on the back of the display. Note Vcc is connected to 3.3 VDC not 5 VDC as shown on the sketch.
 

 
So yes many will have trouble connecting the dots so the magic decoder ring is provided below. Please no inquires about how to connect the output of the Si5351 --CLK0 is the LO and CLK2 is the BFO.
 

73's
Pete N6QW


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ESP8266 Weather Station Projects http://www.electronicsinfoline.com/pin/47167/ Fri, 20 Jan 2017 21:03:21 +0000 https://blog.squix.org/?p=1762

Pinned onto Squix Techblog

In this post I’d like to show you some of the projects that other people did based on my WeatherStation library. I hope this will inspire you to get creative and extend the code with you features. Or maybe you have built a nice case around the WeatherStation. If you do so please contact and ...

Read More

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Single tube Lethal Nixie clock http://www.electronicsinfoline.com/pin/47158/ Fri, 20 Jan 2017 19:35:20 +0000 http://dangerousprototypes.com/blog/?p=93459

Pinned onto Dangerous Prototypes

Andrew Moser made a lethal nixie tube clock: Clock 1: Single tube Lethal Nixie clock — you know having all the high voltage lines exposed and un-insulated. Inspiration for this design was from this clock. Unfortunately I built mine right after having surgery. I think the painkillers had something to do with the aesthetics… Anyhow […]]]>
How to make a simple 1 watt audio amplifier (LM386 based) http://www.electronicsinfoline.com/pin/47160/ Fri, 20 Jan 2017 18:54:39 +0000 http://dangerousprototypes.com/blog/?p=93455

Pinned onto Dangerous Prototypes

A tutorial on making an LM386 audio amplifier circuit from Afrotechmods: A tutorial on how to use the popular LM386 class AB audio amplifier IC to build a simple mono 1 watt audio amplifier. It costs less than $3 in parts! There is also a brief discussion of how to use high pass filters to […]]]>
Flashing Binaries to DRA7xx Factory Boards Using Device Firmware Upgrade http://www.electronicsinfoline.com/pin/47147/ Fri, 20 Jan 2017 18:30:06 +0000 https://www.eeweb.com/design-articles/flashing-binaries-to-dra7xx-factory-boards-using-device-firmware-upgrade/

Pinned onto EEWeb

This application report provides detailed procedures for flashing the binary images to eMMC Flash memory using Device Firmware Upgrade (DFU). G...]]>
Dot² isn’t your typical coffee table http://www.electronicsinfoline.com/pin/47151/ Fri, 20 Jan 2017 18:08:47 +0000 https://blog.arduino.cc/?p=16077

Pinned onto Arduino Blog

Coffee tables are useful for putting coffee, food, or perhaps way too much junk on, but it’s 2017—we can do better than that! Akshay Baweja certainly has at least with Dot², an interactive piece of furniture that can run animations, display lighting effects, and play old-school games. The Arduino Mega-based table features a matrix of 296 LEDs that shine up […]]]>
Debugging ARM Cortex-M0+ HardFaults http://www.electronicsinfoline.com/pin/47127/ Fri, 20 Jan 2017 01:58:05 +0000 http://dangerousprototypes.com/blog/?p=93451

Pinned onto Dangerous Prototypes

Erich Styger has written an article on debugging a hard fault on an ARM Cortex-M0+ device: To me, one of the most frustrating things working with ARM Cortex-M cores are the hard fault exceptions. I have lost several hours this week debugging and tracking an instance of a hard fault on an ARM Cortex-M0+ device. More […]]]>
EMP Jammer build http://www.electronicsinfoline.com/pin/47129/ Fri, 20 Jan 2017 00:06:05 +0000 http://dangerousprototypes.com/blog/?p=93445

Pinned onto Dangerous Prototypes

A how-to on making an EMP jammer from JunezRiyaz, project instructables here: An electromagnetic pulse (EMP), also sometimes called a transient electromagnetic disturbance, is a short burst of electromagnetic energy. Such a pulse may occur in the form of a radiated electric or magnetic field or conducted electrical current depending on the source. EMP Jammer is a device […]]]>
A 3D-printed e-drum pad http://www.electronicsinfoline.com/pin/47122/ Thu, 19 Jan 2017 19:09:05 +0000 https://blog.arduino.cc/?p=16070

Pinned onto Arduino Blog

After making his first drum with a laser cutter, Ryo Kosaka redesigned it as a 3D-printed structure so more people could build it. If you’d like to practice playing the drums, but would rather not disturb your family, roommate, neighbors, dog, etc., then an electronic version is probably a good idea. Since you’re reading our […]]]>
Interactive geodesic LED dome = extreme geometric fun! http://www.electronicsinfoline.com/pin/47099/ Thu, 19 Jan 2017 15:22:10 +0000 https://blog.arduino.cc/?p=16065

Pinned onto Arduino Blog

We’ve all seen geodesic domes in one form or another, whether as a modern experiment, as housing from a bygone era, or perhaps as a gigantic structure in Orlando (technically a geodesic sphere). Jon Bumstead apparently wasn’t satisfied with current dome options, and instead created his own, integrating elements from programmable LED tables to make it […]]]>
Guide to build your 3.3v power supply http://www.electronicsinfoline.com/pin/47086/ Thu, 19 Jan 2017 04:54:21 +0000 http://www.gadgetronicx.com/?p=2998

Pinned onto Gadgetronicx

  The industry of Electronics is going through a paradigm shift as there is an increase in demand of devices which consume less power. It also had a significant effect on hobbyists, tinkerers and engineers as market for 3.3v components...
Read more

The post Guide to build your 3.3v power supply appeared first on Gadgetronicx.

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SDR radio breathes life into a 75 year old Marconi CR100 http://www.electronicsinfoline.com/pin/47073/ Thu, 19 Jan 2017 02:02:51 +0000 http://dangerousprototypes.com/blog/?p=93414

Pinned onto Dangerous Prototypes

  Jon Hudson over at DesignSpark‎ writes: This is a belated post of a fun project we did for RS Components. With the upcoming 80th anniversary of the founding of ‘RadioSpares’ – the original name for UK-based RS-Components, and the creation of an “Engineers’ Playground” as a feature of the 2016 Electronica event in Munich, […]]]>
A Time for Ranting! http://www.electronicsinfoline.com/pin/47077/ Thu, 19 Jan 2017 01:39:00 +0000 http://www.electronicsinfoline.com/?guid=20df2065b0b4a94f29f68d98fbc6d890

Pinned onto N6QW

Things that are obvious are obvious!!!!!I receive many emails regarding some of my projects. Sitting on this end I wonder a bit about those who sends the emails. Mind you I am not saying I am infallible or not subject to error; but there is a differenc...]]>
Emulate a Commodore 64 keyboard with a modern PC and an Arduino http://www.electronicsinfoline.com/pin/47062/ Wed, 18 Jan 2017 21:09:51 +0000 https://blog.arduino.cc/?p=16060

Pinned onto Arduino Blog

Using an Arduino, Adam Podstawczynski is able to translate keystrokes on his notebook to character inputs on a C64. If you enjoy using a Commodore 64, but either don’t like (or perhaps don’t have) its keyboard, Podstawczynski’s project could be a great solution. His build runs a Python script on a PC, Mac, or Linux computer, which […]]]>
USB2005 and USB97C202 Sharing ATA/ATAPI Drive w/ Another Controller http://www.electronicsinfoline.com/pin/47058/ Wed, 18 Jan 2017 21:00:53 +0000 https://www.eeweb.com/design-articles/usb2005-and-usb97c202-sharing-ata-atapi-drive-w-another-controller/

Pinned onto EEWeb

This application note describes how to implement a design where a single ATA/ATAPI device is shared by the SMSC USB2005 USB ATA/ATAPI controlle...]]>
Robotic Cat Laser http://www.electronicsinfoline.com/pin/47040/ Wed, 18 Jan 2017 13:36:00 +0000 http://www.freetronics.com.au/blogs/news/robotic-cat-laser

Pinned onto Freetronics

Does your pet cat love chasing around a laser light? For the cost of a couple of servo motors, an Arduino and a laser light you can provide your cat with endless entertainment.  The automated cat laser uses servo motors to constantly move the laser and entertain the cat, with no effort on your behalf! To find out how you can build your own cat laser robot checkout the instructable from joe at the following link.

Cat Bot

 If you are looking for a servo motor to use in your own robotics project why not checkout our standard servo. The standard hobby servo rotates approximately 180 degrees and comes with a variety of horns, mounting screws and rubber mounting bushes. To find out more check out the product page.

Servo Motor

Found this project interesting? Working on own of your own projects you would like us to feature? Let us know in the comments section below or on Facebook and Twitter.  ]]>
LED traffic light http://www.electronicsinfoline.com/pin/47031/ Wed, 18 Jan 2017 13:02:20 +0000 http://dangerousprototypes.com/blog/?p=93432

Pinned onto Dangerous Prototypes

Domen Ipavec shared his DIY LED traffic light in the project log forum: Traffic lights are all around us, and they seem simple enough but are they really? Real traffic lights can be a very complicated system because it requires sophisticated control and coordination for smooth and safe traffic. The traffic light I made is […]]]>
Estimating Power for ADSP-BF561 Blackfin® Processors http://www.electronicsinfoline.com/pin/46964/ Mon, 16 Jan 2017 20:00:03 +0000 https://www.eeweb.com/design-articles/estimating-power-for-adsp-bf561-blackfin-processors/

Pinned onto EEWeb

This EE-Note discusses the methodology for estimating total average power consumption of ADSPBF561 Blackfin® embedded symmetric multiproces...]]>
Control a tracked robot with your mind (or joystick) http://www.electronicsinfoline.com/pin/46956/ Mon, 16 Jan 2017 19:29:49 +0000 https://blog.arduino.cc/?p=16051

Pinned onto Arduino Blog

Whether you choose to control this vehicle with your mind or a joystick, the camera mounted on it will give you a new view of the world. Maker “Imetomi” was inspired to create a tracked robot after he was able to salvage a camera off of a cheap drone. This became the basis of his FPV […]]]>
A 400W (1kW Peak) 100A electronic load using linear MOSFETs http://www.electronicsinfoline.com/pin/46948/ Mon, 16 Jan 2017 16:59:56 +0000 http://dangerousprototypes.com/blog/?p=93425

Pinned onto Dangerous Prototypes

Kerry Wong built a 400W/100A electronic load using linear MOSFETs:  I bought a couple of IXYS linear MOSFETs (IXTK90N25L2) a while ago to test their capabilities when used as electronic load, and the result was quite impressive. So I decided to build another electronic load using both MOSFETs. As you can see in the video towards […]]]>
Shirt Pocket Transceiver with the Si5351 and OLED http://www.electronicsinfoline.com/pin/46950/ Mon, 16 Jan 2017 16:07:23 +0000 http://dangerousprototypes.com/blog/?p=93418

Pinned onto Dangerous Prototypes

Pete Juliano’s (N6QW) Shirt Pocket Transceiver with the Si5351 and OLED display: In 2011 I fulfilled a dream of building a shirt pocket sized QRP SSB transceiver. Well actually I built two of them and the second was a diminutive 2″ X 4″ X 2″. Both used through hole components –so no cheating with SMD. […]]]>
Top 10 ways to increase your practical engineering knowledge as an Electronics Engineer http://www.electronicsinfoline.com/pin/46609/ Mon, 16 Jan 2017 07:12:14 +0000 http://www.electronicsinfoline.com/?p=46609

Pinned onto Articles

The world of science and technology is changing exponentially and this is the main reason why an engineer should keep enhancing his skills and learn new ones so that he can keep up with this ever changing technology. Electronic engineering is also not speared form this rapid evolution. Moore’s Law (1965) for example has been […]]]>
All metal C930e webcam http://www.electronicsinfoline.com/pin/46904/ Mon, 16 Jan 2017 04:11:41 +0000 http://kurokesu.com/main/?p=1335

Pinned onto KoruKesu

I had Logitech C930e webcam laying in my drawer for a while waiting for a better fate. So today finally fitted it into aluminium C920 enclosure to be used with CS lenses. Actually it did not took much, had to remove some material on my trusty Proxxon MF 70 mini mill, everything else fitted like […]]]>
The Soldering Tools That Make Your Life Easier http://www.electronicsinfoline.com/pin/46911/ Mon, 16 Jan 2017 00:00:00 +0000 http://www.build-electronic-circuits.com/soldering-tools/

Pinned onto Build Electronic Circuits

The soldering tools you need and how to choose a soldering iron

Copyright Build Electronic Circuits

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App note: Operation evaluation of ultra low ON resistance MOSFET supporting quick charge for 1 cell Lithium ion battery protection http://www.electronicsinfoline.com/pin/46865/ Sun, 15 Jan 2017 17:00:41 +0000 http://dangerousprototypes.com/blog/?p=93406

Pinned onto Dangerous Prototypes

ON semiconductor’s application note on faster charging of Lithium Ion batteries with consideration on heat suppression. Link here (PDF) Currently, because LiB (Lithium Ion Battery) is superior in current density and electromotive force, it becomes mainstream of batteries for mobiles such as smart phone. However, because LiB is weak at over-charge and over-discharge, a control […]]]>
Synthesized Sidetone http://www.electronicsinfoline.com/pin/46855/ Sun, 15 Jan 2017 13:42:00 +0000 http://www.electronicsinfoline.com/?guid=e95163e61c67c5d368eee4986914c308

Pinned onto Shack Nasties

The m0xpd bench is full of even more tangles of wire, associated with analog synthesis.I realised this morning that my new system could be gated by any time sequence, such as that produced by my Morse keyer - it is Funky after all! So, I've made the mo...]]>
App note: Application precautions: Power MOSFET application notes http://www.electronicsinfoline.com/pin/46846/ Sun, 15 Jan 2017 13:00:32 +0000 http://dangerousprototypes.com/blog/?p=93403

Pinned onto Dangerous Prototypes

Toshiba’s application note on the things to consider when picking a power MOSFET. Link here (PDF) This document explains selecting MOSFETs and what we have to consider for designing MOSFET circuit, such as temperature characteristics, effects of wire inductance, parasitic oscillations, avalanche ruggedness, and snubber circuit.]]>
Fixed DC/DC Regulator Output Margining Using Digitally Controlled Potentiometer http://www.electronicsinfoline.com/pin/46231/ Fri, 13 Jan 2017 18:30:05 +0000 https://www.eeweb.com/design-articles/fixed-dc-dc-regulator-output-margining-using-digitally-controlled-potentiom/

Pinned onto EEWeb

Many applications using a DC/DC regulator are implemented with a resistor divider in the feedback path to set up Vout. However, for some high end applications, the voltage needs to be adjusted in order to optimize the application’s performance. A Digitally Controlled Potentiometer (DCP) can be used in both high end and low end applications […]]]>
An Arduino-powered automatic guitar footswitch http://www.electronicsinfoline.com/pin/46227/ Fri, 13 Jan 2017 15:31:16 +0000 https://blog.arduino.cc/?p=16039

Pinned onto Arduino Blog

If remembering to hit your foot pedal at the right time during shows is a challenge, this device will take care of it for you. As creator Franco Molina points out, there’s a lot to worry about when playing guitar in front of an audience. Actually playing is one thing, but you have to pay […]]]>
A Mass Programming Bench for ATMega32u4 MCUs http://www.electronicsinfoline.com/pin/46235/ Fri, 13 Jan 2017 14:54:00 +0000 urn:md5:2f9ab9d21d92d9d15f7636aa1099d84c

Pinned onto My Projects

Or how to try to spend as little time as possible programming several thousands MCUs…. Why…. Just Why? As you may know I started the Mooltipass offline password keeper project more than 2 years ago. Together with a team of volunteers from all over the globe I created two Mooltipass devices which were successfully crowdfunded […]]]>
Shirt Pocket Transceiver withe the Si5351 and OLED http://www.electronicsinfoline.com/pin/46210/ Fri, 13 Jan 2017 02:17:00 +0000 http://www.electronicsinfoline.com/?guid=b1d4f044754af3f47217b0a5cd240b76

Pinned onto N6QW

Moving on with the latest Technology! In 2011 I fulfilled a dream of building a shirt pocket sized QRP SSB transceiver. Well actually I built two of them and the second was a diminutive 2″ X 4″ X 2″. Both used through hole components –so no cheating with SMD. In each case the IF was 4.0152 […]]]>
These students created their own Overwatch VR rig http://www.electronicsinfoline.com/pin/46221/ Thu, 12 Jan 2017 21:51:47 +0000 https://blog.arduino.cc/?p=16032

Pinned onto Arduino Blog

A group of high school students in South Korea have created a multi-part rig that lets them play Overwatch in virtual reality. Their console, which resembles somewhat of a Virtuix Omni treadmill, enables users to move around the battlefield by leaning in whichever direction they want to go, to fire and reload their weapon with a custom toy gun controller, and even to hit things by […]]]>
Sony TC-252 reel to reel player restoration http://www.electronicsinfoline.com/pin/46183/ Thu, 12 Jan 2017 14:11:58 +0000 http://dangerousprototypes.com/blog/?p=93391

Pinned onto Dangerous Prototypes

Dilshan Jayakody has written an article about Sony TC-252 reel to reel player repair: As a first step of the restoration we remove the LA4440 module attached into that recorder and rewire the player with original wiring layouts. After rewiring we check all the transistors in that player and find-out that the couple of 2SC634 […]]]>
Low Power Techniques for Atmel SMART ARM MCUs http://www.electronicsinfoline.com/pin/46142/ Wed, 11 Jan 2017 21:00:29 +0000 https://www.eeweb.com/design-articles/low-power-techniques-for-atmel-smart-arm-mcus/

Pinned onto EEWeb

This application note explains about low power modes available in Atmel® | SMART SAM3/SAM4 Microcontroller family. This application note also gives a walkthrough on information, techniques, and strategies, which can help in achieving low power with Atmel SMART ARM®-based MCUs. In low power targeted applications, many factors have to be considered to bring down the […]]]>
Attachment is like a modern-day message in a bottle http://www.electronicsinfoline.com/pin/46134/ Wed, 11 Jan 2017 20:11:08 +0000 https://blog.arduino.cc/?p=16018

Pinned onto Arduino Blog

If you want to reach out to someone, you could always pick up your phone and send a text. But if you’re seeking something a bit more random and indirect, one idea would be to write and attach a message to a biodegradable balloon using Swiss designer David Colombini’s “poetic machine.” Colombini’s Attachment project allows you to […]]]>
Scare away unwanted guests with an eye-moving portrait http://www.electronicsinfoline.com/pin/46126/ Wed, 11 Jan 2017 17:07:20 +0000 https://blog.arduino.cc/?p=16012

Pinned onto Arduino Blog

There are certainly many ways to generate an old-looking portrait with moving eyes, but this method from Sonic Robots is simple and seems quite effective. The basic formula is to buy a Victorian-like frame, get a picture of a loved/hated/random person (preferably tweaked to resemble an antique oil painting), then put a strip of paper with eyes printed on […]]]>
Inside the 74181 ALU chip: die photos and reverse engineering http://www.electronicsinfoline.com/pin/46118/ Wed, 11 Jan 2017 15:17:14 +0000 http://dangerousprototypes.com/blog/?p=93387

Pinned onto Dangerous Prototypes

A detailed die photos and reverse engineering of the 74181 ALU chip by Ken Shirriff: What’s inside a TTL chip? To find out, I opened up a 74181 ALU chip, took high-resolution die photos, and reverse-engineered the chip.1 Inside I found several types of gates, implemented with interesting circuitry and unusual transistors. The 74181 was a […]]]>
Watch an Arduino Mega-based robot play the bagpipes http://www.electronicsinfoline.com/pin/46101/ Tue, 10 Jan 2017 19:22:39 +0000 https://blog.arduino.cc/?p=16002

Pinned onto Arduino Blog

Using gigantic hands scaled up from a prosthetic design, “XenonJohn” can now hear the sweet sounds of Scotland whenever he wants. Seeing this invention, you might note to yourself that most instrument-playing robots don’t actually bother to have realistic—if huge, at 171% normal print size—hands attached. Then again, you probably haven’t seen a robot configured […]]]>
It takes two Raspberries to run a clock http://www.electronicsinfoline.com/pin/46086/ Tue, 10 Jan 2017 15:01:42 +0000 http://kurokesu.com/main/?p=1282

Pinned onto KoruKesu

Despite lousy title, I will tell my success story how to add visual output to well known IoT tool called Node-RED. One Raspberry Pi, let’s call it RPI-RED, will be running Node-RED another one RPI-LED will be dedicated to server LED panel. First you should should install Node-RED to RPI-RED. Installation is well described in […]]]>
Cozy Coupe toy car retrofitted with Arduino http://www.electronicsinfoline.com/pin/46060/ Tue, 10 Jan 2017 14:27:06 +0000 https://blog.arduino.cc/?p=15992

Pinned onto Arduino Blog

Using an Arduino Uno along with an Adafruit Wave Shield, Brent Chapman added more features to the Little Tikes Cozy Coupe including a push-to-start ignition and a sound system. Although Chapman notes that the Coupe comes with some onboard entertainment options, he thought “his client” deserved something a bit more high-tech. This meant that he retrofitted the classic toy […]]]>
EasyESP-1: a rapid prototyping and development board for ESP8266 http://www.electronicsinfoline.com/pin/46053/ Tue, 10 Jan 2017 02:09:33 +0000 http://dangerousprototypes.com/blog/?p=93369

Pinned onto Dangerous Prototypes

Raj over at Embedded Lab has designed a development board for ESP8266: EasyESP-1 is a rapid prototyping board for the low-cost, WiFi-enabled ESP8266 microcontroller. With an onboard USB-to-Serial converter pre-installed, EasyESP-1 does not require any additional hardware to download your application firmware to the ESP8266 chip. The ESP module used in this development board is […]]]>
Back to Bitx40 and OLED Displays http://www.electronicsinfoline.com/pin/46042/ Mon, 09 Jan 2017 23:53:00 +0000 http://www.electronicsinfoline.com/?guid=5f534550c5c1ef6462e587f9421525f1

Pinned onto N6QW

Expanding the Bitx40 Horizon … More Hacks! In the course of adding a few refinements to my Bitx40 OLED display, I now have found  new dimensions to displaying information and some additional possibilities for the rig. In the realm of “cool factor” I now have managed to juggle information locations so I can include my […]]]>
SmartPID is a smart temperature and process controller http://www.electronicsinfoline.com/pin/46062/ Mon, 09 Jan 2017 23:11:50 +0000 https://blog.arduino.cc/?p=15979

Pinned onto Arduino Blog

Professionally engineered, SmartPID is a high-tech, programmable temperature and process controller for the DIY community. Compared to a basic on/off thermostat, SmartPID is an “open platform” that can collect temperature from multiple sensors, apply programmable control logic, and drive different loads with a precise PID algorithm. Not only can SmartPID control any thermos-regulated process, heating or cooling, it can be used for […]]]>
Arduino Fridge Thermostat http://www.electronicsinfoline.com/pin/46037/ Mon, 09 Jan 2017 20:20:00 +0000 http://www.freetronics.com.au/blogs/news/arduino-fridge-thermostat

Pinned onto Freetronics

Often the thermostat on a fridge can break rendering the entire fridge useless without costly repair. Fortunately, like most problems, this can be solved using Arduino! Asynkronix has put together a great guide on how you can use an Arduino to cheaply replace a broken thermostat in your fridge. The fix works by reading the […]]]>
Redundant Fan Systems Using the TC647 Fan Manager http://www.electronicsinfoline.com/pin/46033/ Mon, 09 Jan 2017 20:00:01 +0000 https://www.eeweb.com/design-articles/redundant-fan-systems-using-the-tc647-fan-manager/

Pinned onto EEWeb

Certain applications, such as file servers, require redundant cooling fans to ensure uninterrupted system service, even with cooling fan malfunctions present. Typically, such systems have a primary fan to cool the system and one or more “standby” fans that are automatically placed into service should the primary fan fail. Multiple TC647s can be used to implement […]]]>
Curtis 1231C-8601 500A PWM DC motor controller teardown http://www.electronicsinfoline.com/pin/46018/ Mon, 09 Jan 2017 13:43:41 +0000 http://dangerousprototypes.com/blog/?p=93362

Pinned onto Dangerous Prototypes

Jay did a teardown of a Curtis 1231C-8601 500A PWM DC motor controller: The Curtis 1231c-8601 power board is relatively simple. It uses 18 MOSFETS in parallel to switch current from the motor- terminal back to the battery- terminal (the motor+ lead is already connected to battery+). The MOSFETs it uses are IXYS IXTH50N20 SP9536 chips. […]]]>
Node-RED for rapid hardware wiring http://www.electronicsinfoline.com/pin/46000/ Mon, 09 Jan 2017 04:03:58 +0000 http://kurokesu.com/main/?p=1248

Pinned onto KoruKesu

I will be posting few interesting follow-up posts that are based on tool for wiring together hardware devices called Node-RED. This post will serve as a reference how to prepare Raspberry Pi and install it. Besides usual IoT stuff (sensor serving, data collection, aggregation and decision making) I see great opportunity to use node-red in rapid […]]]>
A Diversion from all the Bitx40 Stuff! http://www.electronicsinfoline.com/pin/45977/ Sun, 08 Jan 2017 18:32:00 +0000 http://www.electronicsinfoline.com/?guid=d397bb3fd78066cfc86ab2d1a6b8c55a

Pinned onto N6QW

Does anyone in Radio Land know what this is?      OK do you give up? Well guys and gals this is the world’s most important tool vintage 1965 if you were in a forward combat area and wanted to eat. Yes this foldable, carry on your key chain, (along with your dog tags) is […]]]>
App note: Redefining a new state-of-the-art in microampere current-sense amplifiers http://www.electronicsinfoline.com/pin/45973/ Sun, 08 Jan 2017 17:00:34 +0000 http://dangerousprototypes.com/blog/?p=93356

Pinned onto Dangerous Prototypes

Silicon Lab’s TS1100 and TS1101 current sense amplifier’s features discussed in this app note. Link here (PDF) Sensing and controlling supply current flow are a fundamental requirement in most all electronic systems from battery-operated, portable equipment to mobile or fixed-platform power management and dc motor control. High-side current-sense amplifiers (or “CSAs”) are useful in these […]]]>
Analog Synths http://www.electronicsinfoline.com/pin/45961/ Sun, 08 Jan 2017 15:40:00 +0000 http://www.electronicsinfoline.com/?guid=c7e154bd74972f1d6226eebfbba7af33

Pinned onto Shack Nasties

Cameron was talking about analog synthesizers last week and he got me interested. I refer, of course to my colleague Cameron and not to the former ‘Prime’ Minister. Don’t expect any political comment or porcine quips – that really would be beneath me… There’s quite a lot of common ground between me and analog synths: […]]]>
App note: Multiple Capture/Compare/PWM (MCCP): Extending the functionality for low-cost motor control applications http://www.electronicsinfoline.com/pin/45937/ Sun, 08 Jan 2017 13:00:33 +0000 http://dangerousprototypes.com/blog/?p=93352

Pinned onto Dangerous Prototypes

Microchip’s MCCP module on PIC32 devices demonstrate the built-in majority detection filter for simpler motor control drives. Link here (PDF) The motor control industry has been focusing on designing low-cost motor control drives for various applications. The consumer demand for low-cost motor control applications is driving this trend. Microchip has recently introduced the PIC32MM family […]]]>
Arduino car alarm honks for help! http://www.electronicsinfoline.com/pin/45854/ Fri, 06 Jan 2017 18:40:54 +0000 https://blog.arduino.cc/?p=15964

Pinned onto Arduino Blog

Sure, if you’re going to get a new ride, a model from the twenty-teens would be nice, but for hacking purposes, the simplicity of an older cars makes modification fairly simple. It also makes hot-wiring easy, and as they don’t generally have an alarm system, these vehicles are often targets for theft. After his friend’s VW Beetle was […]]]>
Class D Audio Amplifier Using PIC24FV16KM202 http://www.electronicsinfoline.com/pin/45850/ Fri, 06 Jan 2017 18:30:11 +0000 https://www.eeweb.com/design-articles/class-d-audio-amplifier-using-pic24fv16km202/

Pinned onto EEWeb

Class D amplifiers have become a popular audio amplifier topology due to their high efficiency and subsequent low cost. The high current output stage is implemented using binary switches, resulting in minimal heat generation and power loss. This allows for the power supply, heat sink and overall physical size of the amplifier to be minimized. […]]]>
Die photos and reverse engineering the 74181: The ALU chip in minicomputers http://www.electronicsinfoline.com/pin/45813/ Fri, 06 Jan 2017 17:13:00 +0000 http://www.electronicsinfoline.com/?guid=e151fb921f2f47a27f5a7170e4992740

Pinned onto Ken Shirrif

What’s inside a TTL chip? To find out, I opened up a 74181 ALU chip, took high-resolution die photos, and reverse-engineered the chip.1 Inside I found several types of gates, implemented with interesting circuitry and unusual transistors. The 74181 was a popular chip in the 1970s used to perform calculations in the arithmetic-logic unit (ALU) […]]]>
LiPo batteries hacking and refurbishing http://www.electronicsinfoline.com/pin/45831/ Fri, 06 Jan 2017 17:07:43 +0000 http://dangerousprototypes.com/blog/?p=93341

Pinned onto Dangerous Prototypes

Karman wrote an article showing how to refurbish dead batteries to extend its life: One of the difficult parts when prototyping is to find reliable power sources. Today is still hard to find the battery size we want to use because country exporting frontiers stops these chemical packages. Here I’ll show how to refurbish dead batteries […]]]>
More Hacking of the Bitx40 http://www.electronicsinfoline.com/pin/45833/ Fri, 06 Jan 2017 16:32:00 +0000 http://www.electronicsinfoline.com/?guid=4683ee81d925c129950a8386ab6ff42d

Pinned onto N6QW

Yet another hack of the Bitx40! Think small and smaller! When I built my Bitx40, the display add on  kit which I think now is the standard was not available. So in true ham fashion I simply “rolled my own”. I thought I really got things small when I used an 8X2 backlit LCD coupled […]]]>
Polytone Amplifier Page http://www.electronicsinfoline.com/pin/45793/ Fri, 06 Jan 2017 04:33:00 +0000 http://www.electronicsinfoline.com/?guid=45aae6abea48731a391aca52ca131587

Pinned onto QRPHB

This is a reprise of the Polytone Amplifier Page from my old QRP HomeBuilder web site (2008). Above — The Mega-Brute has an eight inch speaker and is über-portable. This amp tucks into almost any corner. On the rare occasion when I play for a function, I may use a 12 inch extension speaker, depending […]]]>
Turn an Atari 2600 into an electronic drink racer and timer http://www.electronicsinfoline.com/pin/45807/ Thu, 05 Jan 2017 23:12:11 +0000 https://blog.arduino.cc/?p=15957

Pinned onto Arduino Blog

The next time you and your friends want to see who can chug beer (or a non-alcoholic beverage for the younger crowd) the fastest, you may want to try building your own Cider Racer 2600–an electronic racing platform and timer for competitive drinking. Created by YouTuber “MonkeyBOX Entertainment” for an annual Christmas party, the project consists of a broken […]]]>
Wireless Animatronics Hand http://www.electronicsinfoline.com/pin/45776/ Thu, 05 Jan 2017 20:20:00 +0000 http://www.freetronics.com.au/blogs/news/wireless-animatronics-hand

Pinned onto Freetronics

Who has not wanted build a robotic hand at some point in their life? Well this is exactly what instructables member njkl44 has done! Not only does this animatronics hand look totally awesome, it actually emulates the movements of the hand that is inside the “control glove”, making a spectacular effect. The control glove uses […]]]>
This guitar-playing robot performs American folk music http://www.electronicsinfoline.com/pin/45771/ Thu, 05 Jan 2017 19:08:00 +0000 https://blog.arduino.cc/?p=15949

Pinned onto Arduino Blog

Inspired by a statement written on Woody Guthrie’s guitar, This Machine Kills Fascists (TMKF) is an Arduino Mega-based, guitar-playing robot that performs traditional American folk music on a portable stage. Sheet music with the song lyrics are printed and left on the benches set up in front of the stage, while audience members are encouraged […]]]>
Play digital music on this analog interface http://www.electronicsinfoline.com/pin/45722/ Wed, 04 Jan 2017 22:37:10 +0000 https://blog.arduino.cc/?p=15945

Pinned onto Arduino Blog

“I’m a big fan of digital music, especially Spotify. The ability to dial-up a much loved song I’ve not heard for ages or discover new music are just some of the benefits I never tire of,” writes UK-based designer Brendan Dawes. “Yet the lack of physicality to this digital medium has always left me wanting. I […]]]>
Effectively Using the Intersil Small Form Factor Power Management Evaluation Boards http://www.electronicsinfoline.com/pin/45718/ Wed, 04 Jan 2017 21:00:54 +0000 https://www.eeweb.com/design-articles/effectively-using-the-intersil-small-form-factor-power-management-evaluatio/

Pinned onto EEWeb

Today's telecom, datacom and computing environments are delivering more power than ever and requiring less space for the DC/DC conversion. Intersil has numerous power management reference designs for POL conversion in the smallest space available. Designers can take the schematic, BOM (Bill of Materials) layout information and apply it directly to their present design, saving […]]]>
Build an FM radio with an Arduino and other spare parts http://www.electronicsinfoline.com/pin/45863/ Wed, 04 Jan 2017 20:54:18 +0000 https://blog.arduino.cc/?p=15971

Pinned onto Arduino Blog

After not having an FM radio to listen to NPR, electrical engineer Kevin Darrah decided to build his own from spare parts. Like many electronics hackers, Darrah tends to buy random components off of eBay. After all, you may need them at some point, and while cheap, sometimes they take a very long time to […]]]>
EAGLE: Panelizing made easy http://www.electronicsinfoline.com/pin/45700/ Wed, 04 Jan 2017 11:36:09 +0000 http://dangerousprototypes.com/blog/?p=93323

Pinned onto Dangerous Prototypes

Sjaak shared a tip for panelizing PCB boards in Eagle: Panelizing is done by machining a slot between two or more boards, but keep them attached by a small amount of PCB material (mousebites). I used to do it by hand: generated all the schematics into multiple sheets and then route the board and finally […]]]>
Make your own 3D-printed sonic tractor beam with Arduino http://www.electronicsinfoline.com/pin/45672/ Tue, 03 Jan 2017 19:56:34 +0000 https://blog.arduino.cc/?p=15932

Pinned onto Arduino Blog

From magic to science, man has long dreamed about being able to manipulate objects from a distance. People have been able to push something using air or even sound waves for a while, but University of Bristol researcher Asier Marzo and colleagues have come up with a 3D-printable device that can not only repel small […]]]>
Measure a magnet’s strength with this DIY Gauss Meter http://www.electronicsinfoline.com/pin/45659/ Tue, 03 Jan 2017 16:11:52 +0000 https://blog.arduino.cc/?p=15929

Pinned onto Arduino Blog

You may know that a neodymium magnet is more powerful than something you usually find on a refrigerator, but by how much? Most people, even those willing to harvest magnets from disk drives, accept that some magnets are stronger than others. This, however, wasn’t quite good enough for Anthony Garofalo, who instead converted a prototype […]]]>
ESP8266 PlaneSpotter Color http://www.electronicsinfoline.com/pin/45649/ Tue, 03 Jan 2017 15:55:44 +0000 https://blog.squix.org/?p=1710

Pinned onto Squix Techblog

After many hours of work I’m very happy to finally publish all the sources for the ESP8266 PlaneSpotter project. It is not yet really in a V1.0.0 state but I’m sure with the help of the community it will quickly get better. While this post is more a “making-of” you can find build instructions on Github: https://github.com/squix78/esp8266-plane-spotter-color […]]]>
Minstrel ZX80 clone http://www.electronicsinfoline.com/pin/45665/ Tue, 03 Jan 2017 15:28:58 +0000 http://dangerousprototypes.com/blog/?p=93316

Pinned onto Dangerous Prototypes

Dave Curran has a nice build log on his ZX80 clone, which he call Minstrel: Here is a new ZX80 clone that I have called the Minstrel. It is a fairly accurate clone electrically to the ZX80, using the same chips and the original schematic with only a few concessions to the modern world. All the parts are the […]]]>
Z80 Retrocomputing 15 – CP/M on RC2014 Revisted, Using RomWBW http://www.electronicsinfoline.com/pin/45621/ Tue, 03 Jan 2017 06:26:09 +0000 http://www.smbaker.com/?p=1806

Pinned onto Dr. Scott Blog

In this video, I build a new Flash ROM / RAM board and use it to install the RomWBW CP/M distribution on the RC2014: I’ve already done one video on CP/M on the RC2014, but when I built the Zeta 2 Single Board Computer, I liked Sergey Kiselev’s design so much that I thought I’d […]]]>
Qume 842 8″ floppy drive with a RC2014 Z80 retrocomputer http://www.electronicsinfoline.com/pin/45610/ Tue, 03 Jan 2017 05:17:40 +0000 http://www.smbaker.com/?p=1792

Pinned onto Dr. Scott Blog

In this video, I try out a pair of Qume 8″ floppy disk drives with the RC2014: Most people who have read my retrocomputing series probably have some familiarity with 3 1/2″ drives or with 5 1/4″ drives. The 8″ drive preceded the 5 1/4″. I never had the experience, having entered the computer scene […]]]>
Telefunken HiFi Studio 1 restoration http://www.electronicsinfoline.com/pin/45588/ Tue, 03 Jan 2017 03:27:00 +0000 http://www.electronicsinfoline.com/?guid=e592fbbf69f244c8dcef5a72c9405925

Pinned onto Dilshan R Jayakody

HiFi Studio 1 is portable boombox manufactured by Telefunken in around 1979. This player consist with 4 band radio (with LW, MW, SW and FM), cassette player / recorder and with 2 × 30W audio power amplifier. Restored HiFi Studio 1 This unit is designed using both ICs and transistors. Receiver of this unit is […]]]>
A simple push-pull audio amplifier using russian rod tubes and power transformers http://www.electronicsinfoline.com/pin/45584/ Tue, 03 Jan 2017 03:09:56 +0000 http://dangerousprototypes.com/blog/?p=93309

Pinned onto Dangerous Prototypes

KA7OEI blogged about a simple push-pull audio amplifier using russian rod tubes and power transformers: Many years ago I’d read about the type of tube that is now often referred to as a “Gammatron” – a “gridless” amplifier tube of the 1920s, so-designed to get around patents that included what would seem to be fundamental aspects […]]]>
This 3D-printed bionic hand can replace or support a limb http://www.electronicsinfoline.com/pin/45575/ Mon, 02 Jan 2017 21:21:22 +0000 https://blog.arduino.cc/?p=15916

Pinned onto Arduino Blog

3D-printed appendages are, as one might suspect, generally meant for those that are missing a limb. Moreover, there are many other people that might retain partial functionality of a hand, but could still use assistance. Youbionic’s beautifully 3D-printed, myoelectric prosthesis is envisioned for either application, capable of being controlled by muscle contraction as if it were a real body part. […]]]>
Using the ISL6430 in DC-DC Converters for Microprocessors in Gateway Applications http://www.electronicsinfoline.com/pin/45569/ Mon, 02 Jan 2017 20:00:37 +0000 https://www.eeweb.com/design-articles/using-the-isl6430-in-dc-dc-converters-for-microprocessors-in-gateway-applic/

Pinned onto EEWeb

Today’s high-performance microprocessors present many challenges to their power source. High power consumption, low bus voltages, and fast load changes are the principal characteristics which have led to the need for a switch-mode DC-DC converter local to the microprocessor. A common requirement of these and similar processors are decreasing supply voltages as the processor clock […]]]>
Bett 2017: Call for volunteers in London! http://www.electronicsinfoline.com/pin/45577/ Mon, 02 Jan 2017 19:17:14 +0000 https://blog.arduino.cc/?p=15912

Pinned onto Arduino Blog

Arduino Education empowers educators with the necessary hardware and software tools to create more hands-on, innovative learning experience. Later this month, we’ll be exhibiting our latest STEAM program for upper secondary education at Bett 2017 in London: CTC 101 – Creative Technology in the Classroom 101. We’re looking for volunteers to join our team during […]]]>
RooBee One is an open-source SLA/DLP 3D printer http://www.electronicsinfoline.com/pin/45555/ Mon, 02 Jan 2017 16:00:56 +0000 https://blog.arduino.cc/?p=15908

Pinned onto Arduino Blog

Aldric Negrier, a Portuguese Maker and owner of RepRap Algarve, has created an SLA 3D printer named RooBee One. Most desktop 3D printers that you’ll see in Makerspaces or advertised for home use drop material onto a bed using a hot extrusion head. The open-source RooBee One, however, employs a DLP projector along with an Arduino Mega to light up each layer […]]]>
Solar battery charge controller teardown http://www.electronicsinfoline.com/pin/45544/ Mon, 02 Jan 2017 14:43:02 +0000 http://dangerousprototypes.com/blog/?p=93306

Pinned onto Dangerous Prototypes

  A teardown video of a solar battery charge controller from Electronupdate: A solar battery charger: one side goes to a Solar Panel, the other to a lead-acid battery. A charge controller allows the battery to be safely charged. Snagged off of Amazon. Seemed really cheap at $17.36. A look at the assembly quality tells […]]]>
Sony TC-252 reel to reel player restoration http://www.electronicsinfoline.com/pin/45525/ Mon, 02 Jan 2017 03:39:00 +0000 http://www.electronicsinfoline.com/?guid=eb3999637e13c339baaf40c204010fa5

Pinned onto Dilshan R Jayakody

TC-252 is 3 speed reel to reel player manufactured by Sony in around 1970 – 1972. This is transistor based tape player with 4W × 2 audio output power, sound-on-sound and sound-with-sound recording features. The TC-252 which we got to restore had many problems. Major problem is someone alter the circuit in that recorder and […]]]>
Fender Telecaster Jazz Box http://www.electronicsinfoline.com/pin/45500/ Sun, 01 Jan 2017 23:19:00 +0000 http://www.electronicsinfoline.com/?guid=9994ea7a5256e3e108fcb824a45de1cc

Pinned onto QRPHB

Leo Fender invented the solid body electric guitar. Eventually, his invention became the legendary Fender Telecaster®. This basic guitar: withstood the test of time; exudes versatility; sounds great; and most importantly — proves fun to play. I tried out a number of Fender Telecasters at local music stores and 1 stood out. A blue American […]]]>
App note: Add a “Black Box” fault logger to your “Big (or Small) Box” system http://www.electronicsinfoline.com/pin/45493/ Sun, 01 Jan 2017 17:00:48 +0000 http://dangerousprototypes.com/blog/?p=93257

Pinned onto Dangerous Prototypes

Application notes from Maxim Integrated on adding log functionalities in your system. Link here (PDF) This article describes how to add a “black box” functionality – nonvolatile fault logging – to networking, communications, industrial, and medical equipment. It outlines the benefits of recording fault data, including faster, more definitive failure analysis.]]>
App note: Selecting current sensors and transformers http://www.electronicsinfoline.com/pin/45488/ Sun, 01 Jan 2017 13:00:41 +0000 http://dangerousprototypes.com/blog/?p=93253

Pinned onto Dangerous Prototypes

Selection guidelines from Coilcraft. Link here (PDF) Current sensors detect the flow of AC or DC current in a wire or circuit trace. They can be used to detect an on/off/ pulse current condition or to measure the magnitude of the current in the wire or trace. This discussion is limited to AC current sensors. […]]]>
App note: Bluetooth low energy digital pedometer demo design http://www.electronicsinfoline.com/pin/45447/ Sat, 31 Dec 2016 17:00:54 +0000 http://dangerousprototypes.com/blog/?p=93294

Pinned onto Dangerous Prototypes

An application note (PDF!) from Microchip: A Bluetooth low energy digital pedometer demo design A digital pedometer is a portable electronic device that counts each step a person takes by detecting the motion of the person’s body with an accelerometer. This application note demonstrates the implementation of a Bluetooth Low Energy Digital Pedometer using the Microchip PIC16LF1718, […]]]>
Next Generation IoT and Wearable Development Platform http://www.electronicsinfoline.com/pin/45442/ Sat, 31 Dec 2016 14:00:27 +0000 https://www.eeweb.com/project/design_library/next-generation-iot-and-wearable-development-platform

Pinned onto EEWeb

WaRP7 shortens time-to-market by enabling you with the solution which is complete, comes is a tiny form factor, connected and yet flexible enough to offer all the advantages of traditional development tools. The platform consists of a main board and a daughter card. The main board is based on the NXP® i.MX 7Solo applications processor […]]]>
A high-resolution sensor node http://www.electronicsinfoline.com/pin/45418/ Sat, 31 Dec 2016 00:53:37 +0000 http://dangerousprototypes.com/blog/?p=93285

Pinned onto Dangerous Prototypes

A high-resolution sensor node from JeeLabs: The JeeNode Zero is intended as sensor node in a Wireless Sensor Network. This requires: a sensor we can read out periodically, such as the BME280 being able to sleep with a very low current, as recently described the ability to run the node unattended, i.e. without FTDI cable […]]]>
AFE Calibration on SAM V/E/S7x Microcontrollers http://www.electronicsinfoline.com/pin/45411/ Fri, 30 Dec 2016 18:30:12 +0000 https://www.eeweb.com/design-articles/afe-calibration-on-sam-v-e-s7x-microcontrollers/

Pinned onto EEWeb

The Atmel® | SMART SAM V/E/S7x series are high-performance, power-efficient embedded MCUs based on the ARM® Cortex®-M7 processor. Analog-to-digital converters translate analog measurements, characteristic of most phenomena in the real world, to digital format, used in information processing, computing, data transmission, and control systems. The purpose of this application note is to propose a method […]]]>
Bitx40 Project ~ So you want to build a Bitx40? http://www.electronicsinfoline.com/pin/45403/ Fri, 30 Dec 2016 17:51:00 +0000 http://www.electronicsinfoline.com/?guid=5c8dc9b8c5874d6c6474c3050755d16d

Pinned onto N6QW

Building the Bitx40 ~ The how to for the newcomer!   About a month ago I agreed to give a Skype presentation to a local ham club known as the Ventura County Amateur Radio Club (VCARC) on the subject of homebrewing. Hey I am really good at soldering my fingers together so I guess I […]]]>
App note: IR remote control transmitter http://www.electronicsinfoline.com/pin/45394/ Fri, 30 Dec 2016 15:44:06 +0000 http://dangerousprototypes.com/blog/?p=93276

Pinned onto Dangerous Prototypes

IR remote control transmitter application note (PDF!) from Microchip: This application note illustrates the use of the PIC10F206 to implement a two-button infrared remote controller. The PIC10F2XX family of microcontrollers is currently the smallest in the world, and their compact sizes and low cost make them preferable for small applications such as this one. Two […]]]>
Die photos and analysis of the revolutionary 8008 microprocessor, 45 years old http://www.electronicsinfoline.com/pin/45380/ Fri, 30 Dec 2016 01:27:03 +0000 http://dangerousprototypes.com/blog/?p=93269

Pinned onto Dangerous Prototypes

Ken Shirriff has written an article detailing die photos of the vintage Intel 8008 that reveal the circuitry it used: Intel’s groundbreaking 8008 microprocessor was first produced 45 years ago.1 This chip, Intel’s first 8-bit microprocessor, is the ancestor of the x86 processor family that you may be using right now. I couldn’t find good […]]]>
Radioactivity detection using very simple ionization chamber and a single J-FET transistor http://www.electronicsinfoline.com/pin/45373/ Thu, 29 Dec 2016 17:05:02 +0000 http://dangerousprototypes.com/blog/?p=93265

Pinned onto Dangerous Prototypes

Robert Gawron writes: Today I will show a very simple ionization chamber that can detect radioactivity. I was able to detect with it ionizing radiation from a smoke detector (Am241 isotope). It’s also immune to electromagnetic interference (EMI) due to a good shielding. This device doesn’t explicitly use any power supply. It’s connected to a […]]]>
5 key factors to look when buying Single board Computers http://www.electronicsinfoline.com/pin/45384/ Thu, 29 Dec 2016 14:38:13 +0000 http://www.gadgetronicx.com/?p=2926

Pinned onto Gadgetronicx

SBC – single board computers is a computer which is built on a single board circuit including a single or multiple microprocessors, I/O interfaces, RAM and other peripherals. These things when put together will make a fully functional computer. There are plenty of SBC’s available in the market and you might wonder how to pick […]]]>
Arduino NYE Countdown Timer! http://www.electronicsinfoline.com/pin/45352/ Thu, 29 Dec 2016 10:17:00 +0000 http://www.freetronics.com.au/blogs/news/arduino-nye-countdown-timer

Pinned onto Freetronics

Any New Year’s party is incomplete without some sort of countdown to welcome in the new year! Although you could easily use an app on your phone, nothing beats the satisfaction of making your own! This is exactly what The Soldering Station has done using a seven segment display and an Arduino Uno. The instructions […]]]>
DIY IKEA wireless Qi charging for the Hexiwear http://www.electronicsinfoline.com/pin/45339/ Thu, 29 Dec 2016 02:02:39 +0000 http://dangerousprototypes.com/blog/?p=93248

Pinned onto Dangerous Prototypes

Erich Styger built a DIY a wireless charging system for the Hexiwear: The Achilles Heel of the Mikroelektronika Hexiwear is its charging: the charging and USB connector are only designed for a limited number of plug-unplug cycles, and it does not have a wireless charging capability like the Apple iWatch. Until now! I have built […]]]>
82573 NVM Map and Programming Information Guide http://www.electronicsinfoline.com/pin/45327/ Wed, 28 Dec 2016 21:00:18 +0000 https://www.eeweb.com/design-articles/82573-nvm-map-and-programming-information-guide/

Pinned onto EEWeb

This document covers programming information for the Non-Volatile Memory (NVM) of the Intel® 82573. For purposes of this document, 82573 refers to the 82573E, 82573V and 82573L, unless otherwise stated. The Intel® 82573 requires non-volatile content for device configuration, log events and firmware extensions. The NVM might contain the following four main regions: LAN Configuration […]]]>
DirtyPCB X-mas tree http://www.electronicsinfoline.com/pin/45310/ Wed, 28 Dec 2016 14:19:14 +0000 http://dangerousprototypes.com/blog/?p=93242

Pinned onto Dangerous Prototypes

Matthias created a X-Mas tree project using the DirtyPCB boards: The project features an USB capable PIC16F1549 µC with: USB FS device 48 MHz internal Oscillator 2 PWM modules 10-bit ADC with Voltage Reference Integrated Temperature Indicator Module The LEDs are connected to the 2 PWM outputs via N-mos drivers. A Potentiometer is connected to […]]]>
Hacking your mouse for rapid firing http://www.electronicsinfoline.com/pin/45300/ Wed, 28 Dec 2016 12:31:58 +0000 http://dangerousprototypes.com/blog/?p=93232

Pinned onto Dangerous Prototypes

Kerry Wong has written an article detailing a simple hardware hack to make your mouse capable of doing rapid firing: In this blog post, I will show you a simple hardware hack to make your mouse capable of rapid firing (or automatic continuous clicking). Of course you can always resort to software mods to achieve […]]]>
The Bitx40 Project http://www.electronicsinfoline.com/pin/45275/ Wed, 28 Dec 2016 01:17:00 +0000 http://www.electronicsinfoline.com/?guid=5cd3e1023905c699a9b5120f098dffaa

Pinned onto N6QW

The Bitx40 Project –a good rig for just a few dollars! I have been working on building the Bitx40, a neat rig from VU2ESE see www.hfsigs.com. Finally got my unit receiving today using the AD9850 for the LO. Below is a still shot and below that a you tube video. I initially had a problem […]]]>
Nuclear physic applied in smoke detectors http://www.electronicsinfoline.com/pin/45211/ Mon, 26 Dec 2016 23:34:41 +0000 http://dangerousprototypes.com/blog/?p=93218

Pinned onto Dangerous Prototypes

Robert Gawron writes: Not many people know, but in some smoke detectors, radioactive materials play an essential role. Today I will present one of those devices, and my -successful- attempt to reverse engineer it and get the circuit diagram. Those smoke detectors uses a small amount of Americium-241 (chemical symbol: Am) obtained in nuclear reactors […]]]>
Homebrew 40dB step attenuator http://www.electronicsinfoline.com/pin/45192/ Mon, 26 Dec 2016 21:29:00 +0000 http://www.electronicsinfoline.com/?guid=96732c620c1e44ecb48b4631b2707694

Pinned onto DIYcrap

A home lab needs a step attenuator.  It helps in evaluating RF amplifiers, filters and receivers. Both the legendary EMRFD-book, the ARRL handbook, and a variety of QST-articles provides circuit examples for building a homebrew device. Most of them follow the design principles from the January 1967 edition of the 73 magazine (all editions can […]]]>
ADN2848 AC-Coupled Optical Evaluation Kit http://www.electronicsinfoline.com/pin/45207/ Mon, 26 Dec 2016 20:00:41 +0000 https://www.eeweb.com/design-articles/adn2848-ac-coupled-optical-evaluation-kit/

Pinned onto EEWeb

This application note describes the 32-lead ADN2848 laser diode driver Rev. A1 evaluation kit. The evaluation kit is a demonstration board that provides ac-coupled optical evaluation of the ADN2848. This document describes how to configure the board in order to operate this part optically. The ADN2848 is a 3 V dual-loop 50 Mbps to 1.25 […]]]>
FPM5 ~ Using Diagnostic Tools http://www.electronicsinfoline.com/pin/45179/ Mon, 26 Dec 2016 18:57:00 +0000 http://www.electronicsinfoline.com/?guid=441452eced72bbb921ab0997e321f18a

Pinned onto N6QW

FPM5 ~ How to save from pulling out your hair! Well it has been nearly a week since getting the FPM5 in a box and I can truly say this has been some ride. Firstly the adage “if it ain’t broke don’t fix it” rings true. The rig worked great “al fresco” hay wired into […]]]>
Software Defined Radio IC Decap: R820/RTL2832U http://www.electronicsinfoline.com/pin/45175/ Mon, 26 Dec 2016 16:36:14 +0000 http://dangerousprototypes.com/blog/?p=93212

Pinned onto Dangerous Prototypes

Software Defined Radio teardown: R820/RTL2832U Decap Recently there has been much interest in two integrated circuit which were originally designed to receive FM radio and DVB-T TV (as used in Europe). Some enterprising people quickly realised that since they were based on software-defined techniques they could be quickly re purposed for all sorts of clever […]]]>
App note: Solid state relays input resistor selection http://www.electronicsinfoline.com/pin/45140/ Sun, 25 Dec 2016 17:00:17 +0000 http://dangerousprototypes.com/blog/?p=93201

Pinned onto Dangerous Prototypes

SSR or solid state relays input resistor recommendation app note from Vishay. Link here (PDF) Solid state relays (SSRs) are commonly driven by TTL or buffered CMOS logic gates. These gates, when used to sink current, provide adequate drive for SSRs. An open-collector output is not required to drive the SSRs, but it can be […]]]>
App note: The heat is on – High-power surface-mount resistors http://www.electronicsinfoline.com/pin/45136/ Sun, 25 Dec 2016 13:00:13 +0000 http://dangerousprototypes.com/blog/?p=93198

Pinned onto Dangerous Prototypes

Application notes from Vishay on effective heat dissipation for their aluminum nitride utilized resistors. Link here (PDF) The intent is to discuss a few techniques to manage the heat that is generated by high-power surface-mount resistors and the effects they will have on design space, complexity, and cost.]]>
Ultrasonic Anemometer Part 29: Transducer Comparison http://www.electronicsinfoline.com/pin/45067/ Fri, 23 Dec 2016 23:18:01 +0000 https://soldernerd.com/?p=2043

Pinned onto Soldernerd

It’s been way too long since the last post in my Ultrasonic Anemometer series. But better late then never. So far I have always used the same type of transducers. When I started this project I looked around and found the Multicomp MCUSD16A40S12RO. They were comparatively cheap and readily available so I ordered some and […]]]>
New IDE for all Arduino boards! http://www.electronicsinfoline.com/pin/45049/ Fri, 23 Dec 2016 16:09:58 +0000 https://blog.arduino.cc/?p=15882

Pinned onto Arduino Blog

Following the announcement at this year’s World Maker Faire, we’re excited to reveal the release of Arduino IDE 1.8.0—the new official desktop editor for all Arduino boards, both .org and .cc alike. This should come as great news to the entire Arduino community, representing a key milestone in our journey moving forward. You will now […]]]>
A DIY hexagonal Bluetooth speaker with sound-reactive LEDs http://www.electronicsinfoline.com/pin/45362/ Fri, 23 Dec 2016 15:16:41 +0000 https://blog.arduino.cc/?p=15900

Pinned onto Arduino Blog

Imgur user Peter Clough recently created his own colorful “Magic Box” Bluetooth speaker assembly with a NeoPixel visual display. If you need a speaker (or rather a speaker with an enclosure) the easiest way is usually to just buy one. On the other hand, if you want something really awesome and unique, why not build it […]]]>
Forty-9er Shield http://www.electronicsinfoline.com/pin/45043/ Fri, 23 Dec 2016 14:52:07 +0000 http://dangerousprototypes.com/blog/?p=93188

Pinned onto Dangerous Prototypes

m0xpd writes: I’ve been tinkering with a quick lash-up of Wayne Burdick, n6kr’s famous ‘Forty-9er’ receiver, implemented on an Arduino shield and tuned by one of my DDS systems. Regular readers will remember how I tried running my Kanga / m0xpd Sudden-inspired receiver shield under the control of the new DDS on the Internet of […]]]>
JeeNode Zero http://www.electronicsinfoline.com/pin/45039/ Fri, 23 Dec 2016 12:27:28 +0000 http://dangerousprototypes.com/blog/?p=93181

Pinned onto Dangerous Prototypes

JeeLabs has been working on a new board called JeeNode Zero: Enter the STM32, the 32-bit ARM series from STMicroelectronics which has been around for several years, with new chip releases at a breathtaking pace. While most of the more advanced chips are only available in 64-, 100-, or even 144-pin packages, there is also an […]]]>
Forty-9er Shield http://www.electronicsinfoline.com/pin/45033/ Fri, 23 Dec 2016 10:03:00 +0000 http://www.electronicsinfoline.com/?guid=e41c230b4e9af25dfe1d9d46805c7bff

Pinned onto Shack Nasties

I’ve been tinkering with a quick lash-up of Wayne Burdick, n6kr’s famous ‘Forty-9er’ receiver, implemented on an Arduino shield and tuned by one of my DDS systems. Regular readers will remember how I tried running my Kanga / m0xpd Sudden-inspired receiver shield under the control of the new DDS on the Internet of Things board […]]]>
UART to Ethernet Gateway with SAM4S http://www.electronicsinfoline.com/pin/45029/ Fri, 23 Dec 2016 06:30:29 +0000 https://www.eeweb.com/design-articles/uart-to-ethernet-gateway-with-sam4s/

Pinned onto EEWeb

This application note aims at describing the LwIP stack and how to use it to design a UART to Ethernet Gateway. This application note will elaborate the software architecture, internal data transmission scheme and memory footprint to help users make their own Gateway easily according to the real requirement. The Atmel® SAM4S Xplained Pro evaluation […]]]>
Tiny-TS: An open-source DIY touch synthesizer http://www.electronicsinfoline.com/pin/45020/ Fri, 23 Dec 2016 02:07:48 +0000 http://dangerousprototypes.com/blog/?p=93176

Pinned onto Dangerous Prototypes

Jan Ostman has a nice build log on his open-source DIY touch synthesizer the Tiny-TS, that is available on Hackster.io: The Tiny TS is a credit card sized (100x65mm) fully open-sourced synthesizer with a 1-octave capacitive touch keyboard. Check out the video after the break.]]>
Hack your Teddy Ruxpin with Arduino, Raspberry Pi and Alexa http://www.electronicsinfoline.com/pin/45002/ Thu, 22 Dec 2016 20:08:40 +0000 https://blog.arduino.cc/?p=15876

Pinned onto Arduino Blog

If you had a Teddy Ruxpin in the ’80s and ’90s, you probably remember inserting special tapes and hearing him read stories to you. Whether you loved or hated the little bear, it was hard to forget his weirdly moving mouth and eyes. Today though, with small and cheap development boards readily available, this mechanical system is […]]]>
Control this Ohio home’s Christmas lights over the Internet http://www.electronicsinfoline.com/pin/44984/ Thu, 22 Dec 2016 16:24:17 +0000 https://blog.arduino.cc/?p=15865

Pinned onto Arduino Blog

If you don’t want to bother putting up your own lights this year, you can just control Tom Hammond’s! As seen on Good Morning America, Hammond recently put up a Christmas display that can be controlled via a simple online interface between the hours of 5pm and midnight (EST). The setup consists of an Arduino Mega along with a Raspberry Pi […]]]>
Turn an old microscope into a live cell imaging device http://www.electronicsinfoline.com/pin/45255/ Thu, 22 Dec 2016 15:55:03 +0000 https://blog.arduino.cc/?p=15891

Pinned onto Arduino Blog

Microscopes are common pieces of equipment in laboratories (or even high school science classes for that matter), but making movies of living cells usually requires more expensive and specialized tools… until now. With a 3D-printed mount for a smartphone and an Arduino, researchers at Sweden’s Uppsala University have been able to retrofit ordinary microscopes to take time-lapse sequences. To accomplish this, an Arduino […]]]>
Control this Rock ‘em Sock ‘em Robots match with your tweets http://www.electronicsinfoline.com/pin/44940/ Wed, 21 Dec 2016 21:56:51 +0000 https://blog.arduino.cc/?p=15859

Pinned onto Arduino Blog

Los Angeles-based interactive agency Friendly Vengeance is putting up its dukes to “Knock Out Injustice” with the five-day social media fundraising campaign “KO Bots” to benefit L.A. Kitchen. A pair of Rock ‘em Sock ‘em Robots are ingeniously employed for this charity boxing match, in which the action is entirely decided by Twitter. Participants tweet @KO_Bots with the hashtags #RedBot or #BlueBot […]]]>
An Arduino-powered Christmas card game controller http://www.electronicsinfoline.com/pin/44926/ Wed, 21 Dec 2016 15:51:44 +0000 https://blog.arduino.cc/?p=15845

Pinned onto Arduino Blog

Last December, to wish their clients a Merry Christmas, UK-based agency Kerve Creative decided to do something a bit different than just the traditional holiday card. Instead, they created an interactive one with Arduino that transforms into a fully-functional game controller. The card invited recipients with a “little ditty” to play the retro-style Hacky Xmas game. After plugging it into your […]]]>
Working with a Rain Sensor http://www.electronicsinfoline.com/pin/44886/ Tue, 20 Dec 2016 20:01:00 +0000 http://www.freetronics.com.au/blogs/news/working-with-a-rain-sensor

Pinned onto Freetronics

Like to keep track of when it has last rained? With this tutorial from theorycircuit you can learn how to interface between an Arduino and a rain sensor.   Once you have done this the possibilities are endless. You could record data about how often and at what times you get rain, or even use […]]]>
A four-factor lockbox http://www.electronicsinfoline.com/pin/44881/ Tue, 20 Dec 2016 18:46:41 +0000 https://blog.arduino.cc/?p=15840

Pinned onto Arduino Blog

If you really don’t want someone messing with your valuables, a programmable box may be just what you need! Locking mechanisms generally work using one method—a key, for example—to keep them secure, or perhaps two in certain circumstances. This box, designed as a final project for an electrical and computer engineering class at Cornell, instead makes […]]]>
How does the PNP transistor work? http://www.electronicsinfoline.com/pin/44870/ Tue, 20 Dec 2016 17:00:07 +0000 http://www.build-electronic-circuits.com/?p=8466

Pinned onto Build Electronic Circuits

When you learn about the transistor for the first time, usually it’s the NPN transistor. But the PNP transistor is still a mystery to many. If you want to design circuits with transistors, it’s really worth knowing about this type of transistor. For example: Want to automatically turn on a light when it gets dark? […]]]>
Dad builds an Arduino Hot Wheels drag strip for son http://www.electronicsinfoline.com/pin/44863/ Tue, 20 Dec 2016 15:00:07 +0000 https://blog.arduino.cc/?p=15835

Pinned onto Arduino Blog

If you want to eliminate arguments about which toy car is fastest, we’ve got just the project for you. When one’s kid has a birthday, most people go to the store and buy a gift. Phil Tucker instead decided to build something unique for his two-year-old, an automated Hot Wheels drag strip with an electronic […]]]>
Ultrasonic parking sensor http://www.electronicsinfoline.com/pin/44850/ Tue, 20 Dec 2016 11:25:38 +0000 http://dangerousprototypes.com/blog/?p=93158

Pinned onto Dangerous Prototypes

An ultrasonic parking sensor project from Ch00ftech: After electing to use the PING))) sensor exactly as directed, I needed to build the rest of my circuit.  I wanted to build something robust that would mount nicely on the wall of my dad’s garage.  Figuring that the sensor would likely need to be placed down low by […]]]>
Homebrew return loss bridge http://www.electronicsinfoline.com/pin/44841/ Mon, 19 Dec 2016 22:25:00 +0000 http://www.electronicsinfoline.com/?guid=861a83dba637fbcb4aefb4b989c401c4

Pinned onto DIYcrap

I have had some problems making return loss measurements using my homebrew directional coupler, and decided to build the return loss bridge from EMRFD and the ARRL handbook. This is the final device. Obviously, “IN” denotes RF input, “DUT” denotes Device Under Test, and “DET” means Detector. The circuit (picture from the handbook) is fairly […]]]>
Track planets with a laser! http://www.electronicsinfoline.com/pin/44837/ Mon, 19 Dec 2016 21:17:51 +0000 https://blog.arduino.cc/?p=15813

Pinned onto Arduino Blog

If you’d like to observe certain celestial elements, you could do research and search the sky manually. Or just create a system to do it for you! This is exactly what Subham Paul has done using an Arduino Mega, a GPS module, and 3.5-turn-pan and 180-degree-tilt servos. The real-time tracking device can predict the position of planets, calculated […]]]>
Linearizing Microwave Transmission Power Amplifiers Using the SC1894 http://www.electronicsinfoline.com/pin/44833/ Mon, 19 Dec 2016 20:00:23 +0000 https://www.eeweb.com/design-articles/linearizing-microwave-transmission-power-amplifiers-using-the-sc1894/

Pinned onto EEWeb

This document is an introduction to linearizing a microwave transmission-system PA using Maxim's SC1894 RF PA Linearizer (RFPAL) from 4GHz to 80GHz. It includes basic system design considerations to implement a linearized microwave amplifier and the effects of automatic transmit power control (ATPC) on the SC1894 performance. Digital microwave transmission systems require low bit-error rates […]]]>
12 dazzling holiday light displays with Arduino http://www.electronicsinfoline.com/pin/44813/ Mon, 19 Dec 2016 17:05:48 +0000 https://blog.arduino.cc/?p=15828

Pinned onto Arduino Blog

There’s nothing like a dazzling display of lights to help get you into the holiday spirit. Every year, enthusiasts share the magic of the season by decorating their homes with artfully strung, animated bulbs, while some Makers take their projects to the next level using open-source hardware. 2016 did not disappoint. A quick Google search revealed a bunch of Arduino-controlled LED […]]]>
Electro pet http://www.electronicsinfoline.com/pin/44818/ Mon, 19 Dec 2016 17:01:05 +0000 http://dangerousprototypes.com/blog/?p=93151

Pinned onto Dangerous Prototypes

Facelesstech has a nice build log on his electro pet project, inspired by Circuitbeard’s petduino: I got inspiration for this project from the petduino. The petduino is a great project to get kids into coding and electronics. I thought I would have a go and see if I could add some more features to it. […]]]>
Bad electrolytic capacitor teardown http://www.electronicsinfoline.com/pin/44803/ Mon, 19 Dec 2016 13:56:48 +0000 http://dangerousprototypes.com/blog/?p=93147

Pinned onto Dangerous Prototypes

Teardown and analysis of a bad electrolytic capacitor from Electronupdate: So, there sitting in a dumpster is what looks like a perfectly good monitor… some of the protective plastic on the base was never even peeled off. A quick power up showed why it was tossed: it simply did not turn on. I had been […]]]>
PNP Transistor – How Does It Work? http://www.electronicsinfoline.com/pin/44795/ Mon, 19 Dec 2016 04:38:13 +0000 http://www.build-electronic-circuits.com/?p=8345

Pinned onto Build Electronic Circuits

The PNP transistor is a mystery to many. But it doesn’t have to be. If you want to design circuits with transistors, it’s really worth knowing about this type of transistor. For example: Want to automatically turn on a light when it gets dark? The PNP transistor will make this easy for you. If you […]]]>
App note: Audible noise reduction techniques for FPS (Fairchild Power Switch) Applications http://www.electronicsinfoline.com/pin/44777/ Sun, 18 Dec 2016 17:00:23 +0000 http://dangerousprototypes.com/blog/?p=93143

Pinned onto Dangerous Prototypes

Reducing audible noise in switch mode power supplies app note from ON Semiconductors. Link here (PDF) In general, switched mode power supplies do not generate audible noise when they operate at constant ultrasonic frequencies (>20kHz). However, some switched mode power supplies can produce audible noise at certain load conditions. Most Fairchild Power Switches are designed […]]]>
App note: Applications of zero voltage crossing optically isolated triac drivers http://www.electronicsinfoline.com/pin/44765/ Sun, 18 Dec 2016 14:21:58 +0000 http://dangerousprototypes.com/blog/?p=93138

Pinned onto Dangerous Prototypes

App note from Fairchild Semiconductors about their zero voltage crossing isolators. Link here (PDF) The zero-cross family of optically isolated triac drivers is an inexpensive, simple and effective solution for interface applications between low current dc control circuits such as logic gates and microprocessors and ac power loads (120, 240 or 380 volt, single or […]]]>
A Christmas star with Neopixel LEDs http://www.electronicsinfoline.com/pin/44103/ Sat, 17 Dec 2016 05:32:08 +0000 http://dangerousprototypes.com/blog/?p=93124

Pinned onto Dangerous Prototypes

A geeky Christmas decoration made with 56 LED Neopixel and controlled via an Arduino Micro board from Open Electronics: Let’s take a look, therefore, at the project’s electrical section, that is essentially composed of a set of 56 Neopixel LEDs, that have been arranged so to form two concentric stars; the first 35 RGB LEDs (out […]]]>
This robot is a cool new way to use cassette tapes! http://www.electronicsinfoline.com/pin/44087/ Fri, 16 Dec 2016 22:14:07 +0000 https://blog.arduino.cc/?p=15811

Pinned onto Arduino Blog

Though tape players persisted in vehicles for much longer than needed, cassettes are pretty much an obsolete format. That doesn’t mean they can’t be useful, as this project by Moscow-based media artist ::vtol:: shows. His interactive robot, dubbed “pzr-10,” traverses a canvas littered with unwound tape, while two heads read the data off of it. Using an Arduino Uno, this data […]]]>
Create the ultimate Christmas jumper with Arduino http://www.electronicsinfoline.com/pin/44074/ Fri, 16 Dec 2016 20:38:18 +0000 https://blog.arduino.cc/?p=15815

Pinned onto Arduino Blog

We’ve seen plenty of Arduino-equipped holiday sweaters over the years, but none as teched-out as this one. Last Christmas, UK-based Makerspace fizzPOP and electronics retailer Maplin teamed up to create quite the fun and festive jumper. The aptly named “Ultimate Christmas Jumper” features an Uno, a Mega, an Adafruit FLORA, four 8×8 LED panels, some NeoPixels, a […]]]>
Designing Applications with MCP16331 High-Input Voltage Buck Converter http://www.electronicsinfoline.com/pin/44076/ Fri, 16 Dec 2016 18:30:14 +0000 https://www.eeweb.com/design-articles/designing-applications-with-mcp16331-high-input-voltage-buck-converter/

Pinned onto EEWeb

The purpose of this document is to help engineers design different low-power applications and provide insight on how simple non-synchronous buck converters can be used to develop solutions for non-typical requirements. The following paragraphs provide examples of converter applications that fulfill a variety of industry requirements. The solutions provided by Microchip Technology Inc. highlight the […]]]>
PIC32 JTAG Loader / ICSP programmer http://www.electronicsinfoline.com/pin/44070/ Fri, 16 Dec 2016 17:24:00 +0000 http://www.electronicsinfoline.com/?guid=aed5c1f8a65b93825f6beab5fdaa8a7d

Pinned onto Tahmid's Blog

This past semester, I worked on an independent study/project where I explored the programming of the PIC32. I’ve provided the details in the following PDF document. The key takeaway I believe is: “This document presents sufficient background information on the project, and implementation specific details. The most important contribution this makes is adding the experiences […]]]>
Intel(r) Quark(tm) micrcontroller D2000 based Environmental sensors board http://www.electronicsinfoline.com/pin/44003/ Fri, 16 Dec 2016 01:37:57 +0000 http://dangerousprototypes.com/blog/?p=93099

Pinned onto Dangerous Prototypes

Sergey Kiselev designed and built an Intel Quark D2000 micrcontroller based Environmental sensors board: This is a fairly small (51 x 51 mm) board, equipped with a low power Intel Quark D2000 microcontroller, and several sensors (accelerator, temperature, humidity, atmospheric pressure), as well as a mikroBUS compatible header and a Grove compatible connectors, that can be […]]]>
This phone-controlled robot can beat you in air hockey http://www.electronicsinfoline.com/pin/43998/ Thu, 15 Dec 2016 22:24:10 +0000 https://blog.arduino.cc/?p=15801

Pinned onto Arduino Blog

Air hockey is a classic arcade game consisting of two players, two paddles, a puck, and a low-friction table. But what happens if you don’t have an opponent? If you’re Jose Julio, you build a robotic one out of 3D printer parts. An updated version of his earlier design from 2014, Julio upgraded the Air Hockey Robot’s original camera and vision system to […]]]>
FPM5 Wiring Virtually Complete ~ Smoke Test is Complete! http://www.electronicsinfoline.com/pin/44672/ Thu, 15 Dec 2016 17:20:00 +0000 http://www.electronicsinfoline.com/?guid=2b7c0826bc3ace2be58a733186b1c470

Pinned onto N6QW

Wiring is 99% Complete! Smoke Test Passed!!!! Late Breaking News. It is ALIVE! More tests to follow.  73’s Pete N6QW The only remaining wiring is to connect the circuitry so that when you hit the PTT or place the rig in TUNE, the Color TFT displays “ON THE AIR”. How cool is that? There are […]]]>
The Bitx40 project http://www.electronicsinfoline.com/pin/43990/ Thu, 15 Dec 2016 09:12:57 +0000 http://dangerousprototypes.com/blog/?p=93109

Pinned onto Dangerous Prototypes

Pete Juliano, N6QW, has been working on building the Bitx40 project: At this stage the hardware is mounted and previously I had programmed the Arduino/AD9850 which will be used for the LO. The case was something store bought about 6 years ago and is nothing more than a 6X10X2 aluminum chassis painted two tone. The front […]]]>
Pioneer PL-250 turntable restoration http://www.electronicsinfoline.com/pin/43976/ Thu, 15 Dec 2016 01:46:00 +0000 http://www.electronicsinfoline.com/?guid=ec463d2aec5b6ba875f81c21ad5287a9

Pinned onto Dilshan R Jayakody

Pioneer PL-250 is direct drive auto-return turntable with s-shaped tonearm. This turntable is manufactured by Pioneer in around 1979 – 1982. The PL-250 which we got had many electronic and mechanical issues. The main electronic problem in this unit is it’s varying speed. The speed controller of this turntable is based on PA2004 and PA2005 […]]]>
Arduino Controlled Robotic Drum http://www.electronicsinfoline.com/pin/43968/ Wed, 14 Dec 2016 20:50:00 +0000 http://www.freetronics.com.au/blogs/news/robotic-drum-kit

Pinned onto Freetronics

Unlike flawed human drummers, this Arduino powered robotic drum kit never slows down or speeds up! Randofo from instructables has modified his entire drum kit so that it can be controlled over USB on his computer.   The drum kit has a one set of motor controlled drumsticks for each drum or cymbal. Each of […]]]>
Stage Bench is an Arduino-based live controller table http://www.electronicsinfoline.com/pin/43958/ Wed, 14 Dec 2016 19:15:54 +0000 https://blog.arduino.cc/?p=15794

Pinned onto Arduino Blog

Manuel Lukas, a student at the University of Applied Science Mainz, and Sascha Lukas, a student at Cologne University of Music, together make up the German pop band Wyoming. As part of an interdisciplinary project, the duo decided to combine their love for both design and music into one live MIDI controller that’s bigger than commonly available commercial […]]]>
Web Editor updates: Import your sketchbook and more http://www.electronicsinfoline.com/pin/43940/ Wed, 14 Dec 2016 14:58:47 +0000 https://blog.arduino.cc/?p=15778

Pinned onto Arduino Blog

  Some useful updates on the Arduino Web Editor! Are you sticking to the desktop Arduino IDE because all your work is saved locally? That’s no longer a problem! Our brand new import tool enables you to upload your entire sketchbook with just a few clicks on the Arduino Web Editor. It is particularly handy […]]]>
The Bitx40 Project ~Multi-Tasking at Work http://www.electronicsinfoline.com/pin/44675/ Wed, 14 Dec 2016 13:51:00 +0000 http://www.electronicsinfoline.com/?guid=f08f66ba15cfedcf25d5c6f085632627

Pinned onto N6QW

Working Two Projects (FPM5 & Bitx40) Simultaneously! As I wire up the final configuration of the FPM5 I am also working on building the Bitx40. Mind you this is being done under severe time constraints associated with my caregiver duties. So indeed it is a high wire balancing act. There is frustration in being able […]]]>
Teardown of a Vivitar Rapid battery charger http://www.electronicsinfoline.com/pin/43931/ Wed, 14 Dec 2016 01:26:07 +0000 http://dangerousprototypes.com/blog/?p=93082

Pinned onto Dangerous Prototypes

Kerry Wong did a teardown of a Vivitar rapid battery charger for the NP-FW50 lithium-ion battery pack used in Sony A6000 digital camera: The circuit board itself though looks surprisingly clean and well designed. It does not use any dedicated lithium ion battery charging ICs however. Rather a MC34063A buck/boost DC-DC converter chip is used […]]]>
Lixie is a Nixie tube alternative http://www.electronicsinfoline.com/pin/43922/ Tue, 13 Dec 2016 19:19:56 +0000 https://blog.arduino.cc/?p=15774

Pinned onto Arduino Blog

Using a series of etched acrylic panes, the “Lixie” display can show numbers in the style of a Nixie tube. Nixie tubes are beautiful pieces of display hardware that are no longer in production, and are becoming harder and harder to find. They also generally require relatively high DC voltages to operate, making them difficult and […]]]>
Zeta 2 single board computer http://www.electronicsinfoline.com/pin/43904/ Tue, 13 Dec 2016 16:35:27 +0000 http://dangerousprototypes.com/blog/?p=93095

Pinned onto Dangerous Prototypes

Scott Baker has a nice write-up on building a Zeta v2 single board computer designed by Sergey Kiselev: A few of the features of the Zeta 2: 512K Flash Memory, allows CP/M to be booted from Flash, and mounts Flash as a CP/M disk including many tools (assembler, editor, …) 512K Flash ROM, can be […]]]>
Build an Arduino-powered, voice-activated clock http://www.electronicsinfoline.com/pin/43884/ Mon, 12 Dec 2016 22:15:51 +0000 https://blog.arduino.cc/?p=15757

Pinned onto Arduino Blog

Using the MOVI voice recognizer and synthesizer Arduino shield, this DIY clock can respond to your querries. We’re all familiar with the various brands of voice assistants, but most of them require Internet access in order to do anything useful. This project, however, employs the MOVI shield by itself to respond to a user’s request for the […]]]>
Optimizing your Power Amplifier for Predistortion with RF PA Linearizer http://www.electronicsinfoline.com/pin/43876/ Mon, 12 Dec 2016 20:00:01 +0000 https://www.eeweb.com/design-articles/optimizing-your-power-amplifier-for-predistortion-with-rf-pa-linearizer/

Pinned onto EEWeb

This document provides guidelines for designing a power amplifier to achieve optimum performance with Maxim's radio frequency (RF) power amplifier (PA) linearizer (RFPAL) or other types of predistortion. Using RFPAL products (SC1894 and SC2200), an optimally-tuned PA can achieve up to 28dB of correction; thereby, allowing the amplifier to operate at the highest possible efficiency. […]]]>
Make Etch A Sketch doodles on a VGA screen http://www.electronicsinfoline.com/pin/43871/ Mon, 12 Dec 2016 16:26:56 +0000 https://blog.arduino.cc/?p=15753

Pinned onto Arduino Blog

After building a Pong game using an Arduino Uno and a VGA monitor, Rob Cai realized this same setup could be used to make Etch A Sketch-style drawings. Control is surprisingly “Pong-compatible” with two boxes, each with a potentiometer and a button. One knob moves the cursor horizontally and the other vertically. Unlike an actual Etch A Sketch from […]]]>
Semiconductor radioactivity detector http://www.electronicsinfoline.com/pin/43865/ Mon, 12 Dec 2016 15:03:52 +0000 http://dangerousprototypes.com/blog/?p=93084

Pinned onto Dangerous Prototypes

Robert Gawron has been working on a semiconductor radioactivity detector project: Currently I’m trying to make a working version of a radioactivity detector that uses semiconductor as a sensor. It’s a different approach than Geiger-Muller detectors, more complicated, but also much more interesting. While Geiger-Muller counters can only provide information about the amount of particles […]]]>
FPM5 ~ Reverse Polarity Protection http://www.electronicsinfoline.com/pin/44677/ Sun, 11 Dec 2016 18:09:00 +0000 http://www.electronicsinfoline.com/?guid=eadc200a96d21b171ac272752bc506ce

Pinned onto N6QW

FPM5 ~ Protecting All of the Hard Work One of the sickest feeling you can have is to plug in a new rig to 12 VDC and watch it go up in smoke as you realize you had the leads to the power supply reversed. yes I have done it and I am sure you […]]]>
Homebrew WiFi Shield http://www.electronicsinfoline.com/pin/43809/ Sun, 11 Dec 2016 17:51:00 +0000 http://www.electronicsinfoline.com/?guid=99b0235f9874905764f1888f004d5d73

Pinned onto Shack Nasties

Having just finished development of the new m0xpd / Kanga ESP8266 – AD9834 board, I find myself with a few WiFi components knocking about on the bench – so I figured it would be fun to try to make a WiFi shield for an Arduino… Using an ESP8266 (in a module, such as an ESP-12) […]]]>
App note: Transponder coils in an RFID system http://www.electronicsinfoline.com/pin/43805/ Sun, 11 Dec 2016 17:00:45 +0000 http://dangerousprototypes.com/blog/?p=93073

Pinned onto Dangerous Prototypes

A short application note from Coilcraft about transponder coils. Link here (PDF) Radio Frequency Identification (RFID) is the system of using radio signals to send information identifying a particular situation or item. It can be used to track and locate any item including material, people and animals. The RFID transponder coil is part of the […]]]>
App note: Signal transformer application and specification http://www.electronicsinfoline.com/pin/43801/ Sun, 11 Dec 2016 13:00:39 +0000 http://dangerousprototypes.com/blog/?p=93070

Pinned onto Dangerous Prototypes

Application note from Coilcraft discussing the wideband transformer and the autotransformer. Link here (PDF) In the simplest sense, a transformer is two or more windings coupled by a common magnetic field. This magnetic field provides the means to pass voltages and currents from one winding (primary) to the other winding (secondary). Magnetic flux is created […]]]>
Building a Zeta V2 Single Board Computer http://www.electronicsinfoline.com/pin/44652/ Sat, 10 Dec 2016 22:50:23 +0000 http://www.smbaker.com/?p=1782

Pinned onto Dr. Scott Blog

I was so impressed with the Zeta 2 design when I built my floppy controller for the RC2014 that I decided to go ahead and build a Zeta V2 as well! As you’re probably aware if you’ve read my previous blog posts, one of my recent hobbies has been retrocomputing, building computers based on the […]]]>
Z80 Retrocomputing Part 14 – RC2014 Floppy Controller Boards http://www.electronicsinfoline.com/pin/44654/ Sat, 10 Dec 2016 22:13:04 +0000 http://www.smbaker.com/?p=1770

Pinned onto Dr. Scott Blog

In this post, I build a couple of different floppy controllers for the RC2014, and run CP/M on them. If you haven’t read my other video on CP/M on the RC2014, please start there. Motivation Why a floppy controller when I have a perfectly good CompactFlash board? The floppy is more period accurate. If you’re […]]]>
DECA MAX®10 FPGA Evaluation Kit http://www.electronicsinfoline.com/pin/43782/ Sat, 10 Dec 2016 14:00:21 +0000 https://www.eeweb.com/project/design_library/deca-max10-fpga-evaluation-kit

Pinned onto EEWeb

DECA, Development Kit presents a robust hardware design platform built around the 10M50DAF484C6GES MAX10 FPGA, which is the industry’s first single chip, non-volatile programmable logic devices (PLDs) to integrate the optimal set of system components. Users can now leverage the power of tremendous re-configurability paired with a high-performance, low-power FPGA system. Providing internally stored dual […]]]>
An Arduino laser pinball machine http://www.electronicsinfoline.com/pin/43771/ Fri, 09 Dec 2016 19:59:17 +0000 https://blog.arduino.cc/?p=15745

Pinned onto Arduino Blog

Pinball machines may seem like a good Maker project, but the mechanical components are quite involved. “Joesinstructables,” however, decided to take on this project on using an Erector Set, solenoids, and an Arduino board. In order to get around the challenge of using a heavy steel ball, he instead used a much lighter ping pong ball, […]]]>
CTCSS fingerprinting: A method for transmitter identification http://www.electronicsinfoline.com/pin/43756/ Fri, 09 Dec 2016 18:30:45 +0000 http://dangerousprototypes.com/blog/?p=93062

Pinned onto Dangerous Prototypes

Oona Räisänen from Absorptions wrote an article about experimenting with CTCSS fingerprinting: Identifying unknown radio transmitters by their signals is called radio fingerprinting. It is usually based on rise-time signatures, i.e. characteristic differences in how the transmitter frequency fluctuates at carrier power-up. Here, instead, I investigate the fingerprintability of another feature in hand-held FM transceivers, […]]]>
TI DLP® Pico™ Technology for Aftermarket Head-up Displays http://www.electronicsinfoline.com/pin/43754/ Fri, 09 Dec 2016 18:30:14 +0000 https://www.eeweb.com/design-articles/ti-dlp-pico-technology-for-aftermarket-head-up-displays/

Pinned onto EEWeb

A head-up display (HUD) is a transparent display that superimposes rich, configurable, real-time data in a driver's normal line of sight. The HUD concept first appeared in military aircraft, where it was increasingly necessary for the pilot to be able to monitor critical flight data without looking away from outside the aircraft to an instrument […]]]>
Brute force computation for cheap log digital potentiometer http://www.electronicsinfoline.com/pin/43760/ Fri, 09 Dec 2016 16:50:45 +0000 http://dangerousprototypes.com/blog/?p=93058

Pinned onto Dangerous Prototypes

Michael from Acidbourbon writes: This article covers the attempt to build a digital logarithmic potentiometer out of two linear potentiometers. The benefits of this concept Linear digital potentiometers can be easily procured and don’t cost much There are IC packages with two or four modules inside anyway The resulting logarithmic potentiometer is very flexible in […]]]>
Smart "Homer" http://www.electronicsinfoline.com/pin/43733/ Thu, 08 Dec 2016 21:09:00 +0000 http://www.freetronics.com.au/blogs/news/smart-homer

Pinned onto Freetronics

Are you a huge fan of The Simpsons or any other TV show? Thomas Amberg has created a humorous “Homer” puppet which automatically turns on the TV anytime The Simpsons is scheduled to be on. The project works using an Ethernet connected Arduino which automatically checks an online TV program and then uses IR LEDs […]]]>
A DIY Segway-style vehicle http://www.electronicsinfoline.com/pin/43738/ Thu, 08 Dec 2016 20:29:46 +0000 https://blog.arduino.cc/?p=15738

Pinned onto Arduino Blog

Instructables user “stoppi71” has been building a DIY Segway for a while now, and just posted a bunch of info on the project. Balancing on two side-by-side wheels is rather difficult, though as the original Segway showed us, it’s quite possible with electronics to help. Naturally, hobbyists have tried to duplicate this effort, including stoppi71, who started […]]]>
Peeqo is a desktop bot that communicates through GIFs http://www.electronicsinfoline.com/pin/43695/ Wed, 07 Dec 2016 23:07:07 +0000 https://blog.arduino.cc/?p=15733

Pinned onto Arduino Blog

If you’ve been looking for a robotic assistant with the functionality of an Amazon Echo and the cuteness of a Disney character, you’re in luck. That’s because Abhishek Singh has created Peeqo, an open-source DIY device that responds to human speech through GIFs. Peeqo has a Raspberry Pi 3 for his brain along with a pair of Arduino Mini boards […]]]>
Using a Programmable Input Multiplier to Minimize Integer Boundary Spurs http://www.electronicsinfoline.com/pin/43691/ Wed, 07 Dec 2016 21:00:19 +0000 https://www.eeweb.com/design-articles/using-a-programmable-input-multiplier-to-minimize-integer-boundary-spurs/

Pinned onto EEWeb

The concept of using a programmable input multiplier, also nicknamed Spur-b-Gone, allows the spurs of a PLL to be drastically improved, especially for the worst case VCO frequencies. This can be done without changing the input frequency, as this is purely implemented inside the PLL. This feature is included on some TI PLLs, such as […]]]>