Arduino

Arduino is a cheap, open-source microcontroller. (A microcontroller is a programmable chip that can act as the brain of a machine.) Arduino is very popular in open hardware projects, from our CEB Press to Yobot, where it controls yogurt fermentation, to Botanicalls, where it tells you if your plants are underwatered. You can also fabricate one by yourself see:DIY Arduino

http://arduino.cc/en/Main/ArduinoBoardDuemilanove

 Arduino The Documentary (2010) English HD from gnd on Vimeo.

OSE Wiki pages involving Arduino

 * CEB controller
 * Arduino Inverter
 * Charge_Controller_Concept
 * Free_Charge_Controller
 * GardenBot
 * Open energy monitor
 * Open_Source_Charge_Controller
 * Yobot ?