2 layers72 × 20 mm

Controller
schult/midi_concertina
This is a 30-button Anglo Concertina MIDI controller. Click the image below to watch a short demo:
33 parts1
Boards in 1 GitHub repository, designed in KiCad, that use the ESD351DPY by Texas Instruments (1 Channel 30KV ESD Protection Diode with Low Clamping Voltage). See how each wires it, with its parts, size, README and files; the ESD351DPY’s symbol, footprint and pinout are on its own page.

schult/midi_concertina
This is a 30-button Anglo Concertina MIDI controller. Click the image below to watch a short demo: