I went along to the Oxford Raspberry Jam last night at RS HQ. There were several impressive demos. But this one was definitely the best sounding of the lot. Peter Andrew has put together a solenoid sequencer (a bit like a drum machine) which is driven by a python script on a raspberry pi. He’s also written an android app to program the beat with his Nexus 7 tablet.
Solenoids are pulsed to make them strike a tin can, a jar lid, a small glass jar and a saucepan lid. The saucepan lid sounds wonderful. I loved this. Soundtrack is a bit talky I’m afraid, but that’s normal for busy events.
The breakout board is a Ciseco Slice of Pi.
I got video of some of the other demos and will publish that soon. I need to get hold of some solenoids now. :)