499 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.
ADC-PCM4202-SE
ohdsp
100 × 100 mm230 parts2LTAPR-OHL-1.07
BUF-DiffToSE-ADAU1966
100 × 100 mm165 parts2LTAPR-OHL-1.07
STM32GuitarPedalSTM32
GuitarML
60 × 95 mm101 parts4LMIT7
ESP32Slider synth
udu3324
94.6 × 25 mm49 parts2LGPL-3.07
Bisect
cyberboy666
90 × 55 mm29 parts2LGPL-3.07
FreeDSP-G
freeDSP
170 × 101 mm367 parts4LCC0-1.06
Music Visualizer
GhanGhan
295 × 155 mm253 parts2LNo license6
Phasor II
JordanAceto
84.5 × 108.3 mm178 parts2LCC-BY-4.06
ESP32ChrisBox
TUDA-MUST
78 × 46.3 mm177 parts4LCC-BY-4.06
ResFFB
benregnier
40.1 × 108 mm111 parts2LNo license6
RP2040/RP2350Platform16
lerouxb
112 × 86.3 mm108 parts2LNo license6
STM32Nano-Tek
stefanskotte
51 × 42 mm41 parts4LNo license6
Backporch
semi-simple
53.3 × 32.4 mm25 parts2LApache-2.06
4ch-RF-FE
JohnnyGOX17
249.9 × 94.7 mm275 parts4LMIT5
RP2040/RP2350Synth Labs 065 Hotswap RGB
0xCB-dev
305.1 × 95.5 mm228 parts2LCustom license5
STM32Quad adsr
71.1 × 99.1 mm197 parts2LNo license5
RP2040/RP2350Iosefka motherboard
GlobalSequence
213 × 128.5 mm122 parts2LNo license5
Pedal snow white autowah single
dvhx
60.8 × 116.5 mm112 parts2LGPL-3.05
Pedalshield
inktrap
53.3 × 101.6 mm73 parts2LNo license5
Dac attack
saybur
71.8 × 26 mm62 parts2LCERN-OHL-S-2.05
Attenuverter
schenkzoola
30 × 100 mm49 parts2LCC-BY-NC-4.05
Pdmbrd
jaycordaro
35.2 × 52 mm43 parts4LTAPR-OHL-1.05
HagiwoEurorackMixer
fablabnk
29 × 106 mm24 parts2LNo license5
ESP32ESP32 battery management module
KomplexKapharnaum
173.5 × 192.5 mm828 parts4LMIT4
ESP32TI99 22
danwerner21
244 × 244 mm257 parts4LNo license4
STM32Faderbay
vonmartins
360 × 140 mm174 parts4LNo license4
ESP8266Trhmsx
wagnertavares
150.4 × 120.4 mm120 parts4LNo license4
Chisel nes
shino-hinaduki
100 × 100 mm108 parts2LGPL-3.04
AVR/ArduinoTouchless xm
eldstal
57.5 × 61 mm71 parts2LNo license4
Eurorack Dexy Module
Len42
50.5 × 108.2 mm70 parts2LNo license4
Dist amp
thinkfat
63.5 × 100 mm37 parts4LNo license4
ESP32BluetoothPedal Main
skngh
52 × 59 mm36 parts2LMIT4
Ts9 clone
ioankatsi
100 × 80 mm28 parts2LNo license4
Piezo-9v
Supermagnum
70 × 54.5 mm26 parts2LCC0-1.04
Waveblaster to midi module adapter
nikitalita
33 × 94.5 mm6 parts2LApache-2.04
ARTIQAmp
mit-ll
190.5 × 152.4 mm456 parts6LCustom license3