AutomaBeat
A robotic drum / percussion machine thing.
The electronics consist of 8 12v solenoids connected to a Raspberry Pi via a relay. It can be controlled by the web based drum sequencer which I have called PiBeat, or drum patterns can be scripted.
The drums are mostly made from things found around the house. The hammers to hit the can and beer bottle are taken from a chopped up piano found in a skip.
An instructable how to create your own is here, a script to program patterns is here, and the script for the demo sequence is here.