Learn how to turn a motor on and off, and control a motors speed with a microprocessor. See http://www.nerdkits.com/videos/motors_and_microcontrollers_101/ Become the Maker you were born to be. Try Arduino Academy for FREE!  

From http://openenergymonitor.org/ This is a project to develop and build open source energy monitoring, control and analysis tools for energy efficiency and distributed renewable microgeneration. These technologies are at the heart of sustainable energy systems, monitoring and controlling how energy

Ok, What’s a Ardunio? According to Wikipedia: An Arduino is a single-board microcontroller and a software suite for programming it. The hardware consists of a simple open hardware design for the controller with an Atmel AVR processor and on-board I/O