2 layers85 × 79.9 mm

Norns shield-210330
Merlin04/norns-shield-midi
norns shield variant with hardware MIDI in/out
95 parts2GPL-3.0
Boards in 1 GitHub repository, designed in KiCad, that use the HCPL0731R2 by onsemi (-40℃~+85℃ -500mV~18V 1.35V 100mW 100us 10kV/us 2 2.5kV 20mA 20us 500% 5V 60mA DC SOIC-8 Logic Output Optoisolators ROHS). See how each wires it, with its parts, size, README and files; the HCPL0731R2’s symbol, footprint and pinout are on its own page.

Merlin04/norns-shield-midi
norns shield variant with hardware MIDI in/out