The Tentacle-box is a mobile DJ station housed inside an old freestanding Philips radio. The music is from a car stereo hooked to a 12-volt batter jumper, and an Arduino multiplexes the lights. Check out the link for more information, and the Arduino source code.
It should be able to work without being connected to an outlet. It should have lights and it shouldn’t be to heavy to move around. Ateast not by a small wagon. And it should be loud. Not MÃ¶torhead loud but loud enough. It should also be cheap enough so that I would not cry if it got trashed or stolen after a few gigs/parties.
In the Maker Shed: Arduino Duemilanove