Not long after I first armed myself with a soldering iron, I started playing with DC motors, and rigged up a turntable of sorts which read zip discs and cassette tape with a tape head.
This new turntable is an arduino and servo arrangement which lets me control its speed and direction (built with John McAreavey). In this video, I have a contact mic reading the texture scratched into a CD, which is then fed through a WMD Geiger Counter and analog delay pedal for added noise. The setup needs a bit of practice yet but it is nicely hands-on and expressive to play. The video below mixes the desk audio with a room mic, as the servo is a noisy thing in itself.