The 2016 Trommelbold workshop at Fablab Bayreuth
http://wiki.fablab-bayreuth.de/projekte:fabclap
The trommelbold is an Arduino controlled drum machine, that powers up to eight solenoid channels with attached drum sticks or other noise-generating equipment. Rythm sequences can be stored directly in the microcontroller firmware, or controlled remotely via MIDI and/or USB.