An optimized toy piano.
The pulses of the LFO (square wave) can be used as triggers for notes, with the knob the frequency is changed. The 3.5mm jacks are used as input for external trigger/gate signals, using the toggle switches to switch between input and internal frequency. The contacts made with the metal pins and clips determine the pitch of the notes played. The LEDs indicate each pulse, internal or external.
The Piano, untouched
in process
Workbench
last shot before completion