[Kevin Harrington] throws a curve ball with this skeleton in a coffin. Instead of going for the cheap scare, he conjures memories of old cartoons when the bony figure puts on a song and dance. When activated it leans forward to hang out of the coffin donning a tattered tuxedo and top hat. You can hear the servos working as they give jerky yet realistic motion to the tune “Hello! Ma Baby” in the true Michigan J. Frog style. Classic!
He figures it took about $36 in parts to put the skeleton together plus the DyIO module to control it from a PC. Four servos are used in total, connected to the skeleton with some steel cable. Connecting it via a computer makes it a bit easier to synchronize music with motion than just using a microcontroller capable of playing back audio would have been. Code is available from the site linked at the top, and a demo video is embedded after the break.
This would also have been possible by using an Arduino as a DMX controller.