ArtBot
The Arduino based robot that makes art. The Lego motors are connected to two H-bridge circuits made from components from my bits-box. The light sensor on the front is to detect the edge of the canvas and make ArtBot back up and get painting.

The chassis that holds the Arduino and everything together came from an old floppy disk drive. The micro servos are from a toy helicopter and everything else came from junk computers. Total project cost: zero.
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