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Last Twenty Computer Projects

Contemporary Computer, Electronics and Science Projects choosen by our editors.
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Add a Rapid-Fire Button to Your Mouse Using a 555 Timer

Add a Rapid-Fire Button to Your Mouse Using a 555 Timer

Does your finger get tired easily while playing video games? Ever wish you could pwn n00bs faster than the speed of light without ever breaking a sweat? This will show you how.

Published: May 3rd, 2009

Silent Mouse The Second Encounter

Silent Mouse The Second Encounter

Neat HOW TO for keeping the mouse quieter if you have roommates . You can check recorded sound of clicking before and after. FYI, the sounds are of the Genius mouse, but the other one is dead silent too, Also the mouse buttons are now more sensitive, so you will get a few false clicks in the first couple of days, before you learn how to handle it.

Published: May 3rd, 2009

Interface MIDI Instruments to a PC Through a USB Port

Interface MIDI Instruments to a PC Through a USB Port

This Design Idea uses the FT232BM from Future Technology Devices International, a USB-to-UART interface IC that you need not program, to interface a USB port to the MIDI (musical- instrument-digital-interface) bus.

Published: May 3rd, 2009

Connecting your Computer to a Television

Connecting your Computer to a Television

It is a nasty surprise when you switch your monitor on and nothing appears on screen after a patient wait. Even though the resolution is much low, a television may help you to conduct basic procedures copying your files for example in such an emergency.

Published: May 3rd, 2009

Build Yourself a Fan Temperature Control

Build Yourself a Fan Temperature Control

Build yourself a temperature control with the following features -Temperature can be adjusted by the user. The desired temperature can be adjusted over a wide range, so the control is suitable both for regulating case temperature and CPU temperature. Fans are switched off if the temperature is low enough and several fans can be controlled with just one sensor and temperature control.

Published: April 9th, 2009

PC Output Interface

PC Output Interface

A versaile output interface that can control external devices direct from your computer. Uses freely available software and works with both windows and Linux.

Published: April 8th, 2009

A Passive Ethernet Hub

A Passive Ethernet Hub

The network adapters are normal Intel and 3Com models, set to 10 Mbps and Half Duplex. The computers are labelled A, B, C, and the UTP cables from the computers to the hub are 10, 16 and 35 meters long, respectively.

Published: April 5th, 2009

Computer Z80 Project

Computer Z80 Project

Zilog Z80 processor, running at a blistering 20Mhz, Huge 16Kb Flash-based ROM, Enormous 48Kb block of SRAM, Serial interface via 16C550 UART or MAX232, ATA (IDE) hard disk or CD-ROM interface, Built-in bogon-resistant hardware, Unobtainium alloy chassis.

Published: March 15th, 2009

Darrell Harmon Single Board Computer

Darrell Harmon Single Board Computer

The SBC was designed for data acquistion applications, but can be used in many other ways. The fpga is intended to allow for interfacing with user created expansion boards. There is an 80 pin 2mm header with about 65 FPGA IO connected to it. A 50 pin memory interface connector exists in version 20040720, but may not be included in the future.

Published: March 15th, 2009

AVR-USB Remote Sensor

AVR-USB Remote Sensor

RemoteSensor is a more advanced example for using Objective Development firmware-only USB driver for Atmel AVR microcontrollers (AVR-USB). It is a wireless thermo- and hygrometer with an USB port on the receiver. You can draw fancy diagrams of temperature and humidity for up to 16 wireless sensors.

Published: March 15th, 2009

PCM2706 High Fidelity USB Soundcard or USB Headphones

PCM2706 High Fidelity USB Soundcard or USB Headphones

This is a high fidelity external USB Soundcard or USB Headphones project that can be built for your PC or Mac. It is based on the latest PCM2706 IC which functions as a high quality, crystal clear 16-BIT Stereo DAC. It is a single chip digital-to-analog converter that offers two DA output stereo channels, digital SPDIF output and requires very few external components.

Published: March 15th, 2009

Joystick Interfaces

Joystick Interfaces

Since this circuit is also used in all the other versions of the interface I will give a detailed description of its operation. This one is intended for use with 4QD NCC or Pro-120 series controllers which use a 9v internal supply, so the circuit is powered from this. However the supply voltage is not critical.

Published: February 28th, 2009

How to enable telnet in Windows Vista

How to enable telnet in Windows Vista

Published: February 15th, 2009

Use the CD-ROM drive as a audio CD player without the computer

Use the CD-ROM drive as a audio CD player without the computer

Most of the CDROMS available have an Audio-Out Output to either plug in the headphones or connect it to an amplifier. This circuit enables one to use the CDROM as a stand alone Audio CD player without the computer.

Published: December 7th, 2008

Optical output for Creative Infra CD-ROM

Optical output for Creative Infra CD-ROM

This is a little circuit to connect your MD or DAT to your CD-ROM drive with standard optical cable.. Parts cost about 50 FIM. This circuit is tested by me with no problems with locking to signal. Sources were Creative Infra CDROM and Creative Labs AWE32 soundcard. Recording device was SHARP MS-200H Minidisc.

Published: October 17th, 2008

Eprom Emulator

Eprom Emulator

This EPROM Emulator was designed to compliment the EPROM Programmer (Mark 2). An EPROM Emulator can save a vast amount of time when developing software, compared to programming and erasing EPROMs.

Published: September 29th, 2008

How to replace LCD screen and screen inverter on Toshiba Satellite P205 laptop

How to replace LCD screen and screen inverter on Toshiba Satellite P205 laptop

These instructions will help you to replace the LCD screen and the screen inverter on a Toshiba Satellite P205 series laptops.

Published: September 14th, 2008

Toshiba Portege A100, How to remove laptop system board and replace CPU fan.

Toshiba Portege A100, How to remove laptop system board and replace CPU fan.

I had to replace the CPU cooling fan in this Toshiba Portege A100 laptop. At first glance this laptop looked like a Macintosh iBook computer. The laptop was completely white, very unusual color for Toshiba laptop in the USA.

Published: September 12th, 2008

Removing and replacing laptop keyboard

Removing and replacing laptop keyboard

These instructions will help you to remove and replace keyboards on various laptops. I will not be able to cover all models but you will get the idea. Steps for removing and replacing the keyboard are similar for most laptops.

Published: September 10th, 2008

Troubleshooting laptop with backlight failure

Troubleshooting laptop with backlight failure

This laptop came for repair because of the LCD screen backlight failure. My customer complained that the laptop LCD screen is black but the laptop works with an external monitor.

Published: September 10th, 2008