122 open source boards in Audio
Amplifiers, DACs, synthesizers, Eurorack modules, MIDI and guitar pedals. Every board here is a public GitHub project with its KiCad files, read for size, layers and parts. Pick one close to your design and simulate its firmware on HardLabs before you build it.
Eurorack Dual LFO
Len42
50.5 × 108.2 mm79 parts2LNo license50
Andes
niektb
40 × 110 mm109 parts2LCC-BY-SA-4.034
IPod ESP32 barebones
martinroger
59.7 × 64.8 mm14 parts2LMIT22
AVR/ArduinoSSI2130 Oscillator
powsplatboom
84 × 100 mm185 parts4LNo license11
Simplemixsmall
nickajeglin
42.6 × 80 mm59 parts2LNo license207
Ad9864 breakout
loxodes
44 × 39 mm83 parts4LNo license206
Psu
shmoergh
71.1 × 38.1 mm3 parts2LNo license123
ESP32TRSIO
apuder
93.3 × 80.6 mm33 parts2LGPL-3.074
RP2040/RP235016bit
bread-modular
30.5 × 68.6 mm58 parts2LMIT65
Eurorack Dual Mixer
40.3 × 108.2 mm71 parts2LNo license50
Herford
40 × 110 mm109 parts2LCC-BY-SA-4.034
Stereo Mixer
120 × 100 mm121 parts2LNo license11
Audio
anton-vinogradov
80 × 60 mm19 parts2LMIT5
Mix
47 × 79.8 mm56 parts2LNo license207
Synth
47 × 27.5 mm80 parts4LNo license206
Lb-80
30.6 × 21 mm7 parts2LGPL-3.074
Imix
30.5 × 68.6 mm58 parts4LMIT65
Eurorack Dual Filter Module
50.3 × 108.2 mm70 parts2LNo license50
RP2040/RP2350PI SCOPE
40 × 110 mm97 parts2LCC-BY-SA-4.034
Feed Forward Compressor
49.5 × 95 mm49 parts2LNo license11
Simplemix
94 × 151.3 mm41 parts2LNo license207
Adc dual
49.8 × 36 mm78 parts4LNo license206
AVR/ArduinoHihat
30.5 × 68.6 mm52 parts2LMIT65
Eurorack Noise / S&H Module
50.8 × 106.7 mm70 parts6LNo license50
Fv1 module
40 × 110 mm80 parts2LCC-BY-SA-4.034
Feed Forward Compressor 14HP
71.1 × 95 mm45 parts2LNo license11
Audio
melair
80 × 50 mm49 parts4LNo license5
Mult
43.7 × 94.2 mm36 parts2LNo license207
Demod breakout
30.8 × 50.5 mm67 parts4LNo license206
Kick
30.5 × 68.6 mm35 parts4LMIT65
Eurorack State-Variable Filter
50.5 × 102.9 mm68 parts2LNo license50
AVR/ArduinoUSB C PD PSU
24 × 100 mm65 parts2LCC-BY-SA-4.034
OutputBoard
40 × 70 mm35 parts2LNo license11
Util LFO
27.2 × 37.1 mm23 parts2LNo license207
Amp macom vga
27 × 31.5 mm48 parts4LNo license206
Svf
30.5 × 68.6 mm34 parts2LMIT65