2,240 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.
- schematic only · 69 partsRP2040/RP2350
Pi-Pico-Random-Looping-Sequencer
DIYSynthMNL
69 partsMIT4 - schematic only · 16 parts
HermesHandheld
Rexaintreal
16 partsMIT4 
ARTIQAmp
mit-ll
190.5 × 152.4 mm456 parts6LCustom license3
OHDSP-ADAU1452
pwzj
100 × 100 mm376 parts4LTAPR-OHL-1.03
ESP32Starman
adamm
182 × 150 mm241 parts4LCustom license3
STM32EuroSID
activexray
100 × 100 mm222 parts2LNo license3
WEASEL
joebmz98
335 × 200 mm216 parts2LMIT3
ESP32Mainboard
Synthron
160 × 100 mm206 parts4LNo license3
Radio usb interface
SP8EBC
127 × 90 mm200 parts2LNo license3
Usb hexaphonic soundcard
aheinous
100 × 100 mm199 parts2LNo license3
Dsp amp 2to4
kurozz
84 × 90 mm175 parts2LNo license3
MSM Stereo LPF filter board
JordanAceto
167.6 × 101.6 mm173 parts2LNo license3
Tda bridge
f4hpu
175.2 × 125.4 mm170 parts2LNo license3
Dragon32Rev3
jimbro1000
253 × 169.1 mm169 parts2LMIT3
Headphone-DAC-AMP
ddabidov
56 × 96.9 mm167 parts4LNo license3
STM32Mpe32board
udu3324
98 × 79 mm165 parts4LGPL-3.03
Seed3-DevKit-Pedal
daisyaudio
197 × 100 mm142 parts2LNo license3
Portable line mixer
sww1235
77.5 × 114.3 mm131 parts4LMIT3
STM32Cheep4
emeb
38.1 × 100 mm115 parts4LMIT3
ESP323117 AUSIGN
r4hulrr
60 × 60 mm113 parts4LMIT3
Driver
m24h
136 × 52 mm113 parts2LNo license3
STM32Stm midi poc1
LispEngineer
100 × 100 mm111 parts4LCC-BY-SA-4.03
Clockdiv
versusentropy
29.7 × 93.2 mm110 parts2LCustom license3
PSU-5V-6V-Dual9V
ohdsp
100 × 100 mm103 parts2LTAPR-OHL-1.03
RP2040/RP2350V4d2 pico
tomcombriat
54.2 × 94.2 mm99 parts2LTAPR-OHL-1.03
Backup
411568
320 × 81.3 mm98 parts2LMIT3
Ksoloti Core
ksoloti
120 × 100 mm96 parts4LNo license3
AVR/ArduinoMls800
blemasle
293.4 × 80.5 mm92 parts2LGPL-3.03
STM32Dac
sambazley
100 × 64.9 mm86 parts2LNo license3
BalthazarPSU
Turbosavski
83.8 × 31.8 mm85 parts2LCERN-OHL-S-2.03
STM32Audio-Devboard
Outdatedcandy92
56 × 37 mm80 parts4LCERN-OHL-W-2.03
STM32Open DPOAE Interface
bnahill
58.4 × 43.2 mm78 parts4LGPL-3.03
RP2040/RP2350Project athena
reading-hackspace
100 × 100 mm77 parts2LNo license3
Dat ting Module
Len42
50.5 × 108.5 mm76 parts2LNo license3
2024 PiezoPreamp3
arxwtf
71 × 36.8 mm73 parts4LMIT3
ESP32WAZO
DevMubarak1
60 × 60 mm72 parts2LMIT3
Browse boards by part
AMS1117-3.3 1014USBLC6-2SC6 819RP2040 607W25Q128JVS 382TL072 308AP2112K-3.3 300TL074 274ESP32-S3-WROOM-1 258CH340C 241L7805 223Pico 21874HC595 210USBLC6-2P6 199LM358 18674LS04 173AP2112K-3.3TRG1 172ESP32-WROOM-32 165SRV05-4 163Arduino_Nano_v3.x 15674LS245 155LM7805_TO220 15274LS138 151W25Q128JVSIQ 15074LS32 146