Can do 8 solenoids, or 8 DC, or 4 steppers or a mix of those.
USB MIDI with Teensy LC, 4 x Adafruit TB6612.
Box designed with www.makercase.com
See it in action in those videos:
Site specific installation of sound automatons made with saw blades playing a non linear interactive composition
Circular Saw Blade Sound Automata - Sentier sonore - Work in progress
Performance for Scies à Tone Deaf (sound automatons installation), invented instruments and live electronics
Metal harp with MIDI controlled solenoids and geared DC motor