John Malone's Page - GarageLab (arduino, electronics, robotics, hacking) Yet Another ATX Test Bench Power Supply - GarageLab (arduino, electronics, robotics, hacking) I was inspired to build my own test bench power supply following the excellent tutorial by @JumperOnePhil on youtube .
It was actually very simple to do and I didn't get electrocuted in the process. Now I can save on those batteries when building circuits. I'm also hoping to be able to use the +5V source to power 4 or 5 servos for a robotic arm project I am working on. I have to test the current to make sure it's not too much or too little for the servos. Any suggestions are appreciated.
Tutorials. 555 Timer/Oscillator Tutorial. I nside the 555 timer, at fig. 3, are the equivalent of over 20 transistors, 15 resistors, and 2 diodes, depending of the manufacturer.
The equivalent circuit, in block diagram, providing the functions of control, triggering, level sensing or comparison, discharge, and power output. Some of the more attractive features of the 555 timer are: Supply voltage between 4.5 and 18 volt, supply current 3 to 6 mA, and a Rise/Fall time of 100 nSec. It can also withstand quite a bit of abuse.