This is my latest self built instrument. Its a midi controller with 2 membrane ribbon controllers, 12 velocity sensitive button/pads (with jazzy 3 colour leds in) and a couple of gold knobs and a switch which were salvaged from an old radio. All running usb bus powered by an arduino and using max/msp to turn the signal into midi for use in Ableton. Will post a little demo video up here when I get a chance.
Photographed by Adam Luszniak