Levitation

My first Arduino project, floating a permanent magnet using an electromagnet that pulls it up. The power on the coil is regulated by an Arduino Duemilanove board. The only sensor is a Hall effect sensor at the bottom of the electromagnet. Detailed description at http://mekonik.wordpress.com/2009/03/17/arduino-magnet-levitation/, more pictures at http://mekonik.wordpress.com/2009/03/02/my-first-arduino-project/