September 25, 2007

Arduino Optocoupled PWM Motor Speed Control
Electronic Hacks

6

uC Hobby has a nice article about a project that uses an Arduino Microcontroller to read in temperature data and control an optically coupled motor using PWM. “Oscar Gonzalez gives us a simple tutorial for speed controlling a PC FAN and reading a LM35 temperature sensor with an Arduino microcontroller. He covers the use of an optocoupler, PWM (Pulse Width Modulation) and reading analog voltages with the Arduino. This devices

Hide a Hard Drive in a UPS
Computer Hacks

12

  Hack your old UPS and install a covert hard drive by using the existing USB connector for access. No one can tell that there is storage in there. “Your computer downloads in plain sight. Pictures, movies, music, files, whatever! Nobody will even know it’s there. Not your kids, your wife, a burglar – not even the RIAA!” Via: Hack n Mod