My collection of project files and guides to build more DIY electronic musical instruments that I designed over my research/practice are now available on GITHUB and HACKADAY.
New instruments:
Nano Perc v1 (percussive sounds from an arduino nano)
D&D Teensy (pocket sized Drone & Drama from a Teensy 3.2 / 4.0)
Squeal & Scrape (9v amp & contact microphone for workshops)
barry joseph cullen 