A very simple breadboard power supply kit that takes power from a DC wall wart and outputs a selectable 5V or 3. 3V regulated voltage. The. 1″ headers are mounted on the bottom of the PCB for simple insertion into a breadboard.
Via Electronics-Lab.com | Posted on 2009.10.19 at 16:12
I came across a very nice article at tinkerlog. com explaining why you need to use a current limiting resistor to power your leds. They write:
In this post I will try to show, why it’s a good idea to use a current limiting resistor for an LED.
Via Electronics-Lab.com | Posted on 2009.10.19 at 16:04
Everyone knows the problem: You have a transistor, but you can’t read its signature. Or you can’t find the datasheet… You have a diode, but… You have a capacitor, but you can’t read… Here is a smarty solution.
Via Electronics-Lab.com | Posted on 2009.10.18 at 13:09
Alex at Tinkerlog writes:
For my latest projects I used a lot of single cell LiPo batteries. They are really nice. High power density, low self-discharge, no memory effect and they can deliver quite an amount of current.
Via Electronics-Lab.com | Posted on 2009.10.18 at 11:00
LM3909 is a monolithic oscillator designed by National Semiconductor , to flash (LED) Light Emitting Diodes. Packaged in DIP 8 package LM3909 will operate between -25 and 75 degree.
Via Electronics-Lab.com | Posted on 2009.10.18 at 10:53
After seeing the announcement for the arduino contest, I said, hey why not try. So I kinda cheaped out and got the barebones arduino kit, with the intent of "making it my way".
Via Instructables | Posted on 2009.10.17 at 00:26
A research group of the Freiburg university (Germany) and semiconductor vendor Micronas AG has integrated a fuel cell array on a chip. The device could power autonomous microsystems, also known as ‘Smart dust’.
Via Electronics-Lab.com | Posted on 2009.10.16 at 15:39
Dimitris at users. otenet. gr/~meteo writes:
I make a RF simple field strength meter for test the remote control from doors ,alarm e. t. c at frequency VHF-UHF, i used one ?? meter ,2 diodes ,2 ceramic capacitors,a potentiometer,a box ,and one telescopic antenna.
Via Electronics-Lab.com | Posted on 2009.10.13 at 06:06
Mark Houston writes:
Oatley Electronics in New South Wales Australia makes a few kits based around the Raytheon JAN6418 sub-miniature valve (tube). I decided to try out the K272 Stereo Tube Preamplifier – Headphone Driver kit which cost $27AU (~$23US – August 2009).
Via Electronics-Lab.com | Posted on 2009.10.13 at 04:31
This clock is constucted using an old HDD. The clock is controlled using an ATMEGA128 microcontroller and the time is counted from DS1307 real time clock IC.
Via Electronics-Lab.com | Posted on 2009.10.13 at 03:17