2,215 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 · 113 parts
Eurorack-2164-Quad-Exponential-VCA
DIYSynthMNL
113 partsNo license6 - schematic only · 48 parts
Bent wavefield
wenbakefield
48 partsNo license6 - schematic only · 39 parts
Bad raspi jamma
KabukiFlux
39 partsMIT6 
ESP32TR-808 clone
mkomakonkon
442 × 421.7 mm1268 parts2LNo license5
STM32R2RDAC2026 REVIZE II
ERDALECE
246 × 120 mm919 parts6LGPL-3.05
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
STM32Open running watch hw
fuad1502
41 × 61.9 mm208 parts4LNo license5
SignalSnagger
OpenARDF
133.4 × 44.4 mm200 parts4LMIT5
STM32Quad adsr
JordanAceto
71.1 × 99.1 mm197 parts2LNo license5
Dolphins
apaleslimghost
127 × 128.5 mm171 parts2LMIT5
Vca-8
polykit
114 × 123 mm168 parts2LNo license5
Main-Board
open-headset-interconnect-standard
100 × 84 mm146 parts2LCC-BY-4.05
C-Audio-BHOA
Stustup
100 × 100 mm143 parts4LGPL-3.05
RP2040/RP2350Mp3-player
espcaa
52 × 115.8 mm141 parts4LCustom 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
LoChord
kiwifruit0
130 × 90 mm76 parts4LNo license5
Pedalshield
inktrap
53.3 × 101.6 mm73 parts2LNo license5
BMP SuperColliderClone
cracked-machine
41.9 × 92 mm67 parts2LNo license5
Dac attack
saybur
71.8 × 26 mm62 parts2LCERN-OHL-S-2.05
Attenuverter
schenkzoola
30 × 100 mm49 parts2LCC-BY-NC-4.05
ESP32Veramonitor
eigenlucy
137.2 × 120.1 mm47 parts2LMIT5
Pdmbrd
jaycordaro
35.2 × 52 mm43 parts4LTAPR-OHL-1.05
Board
wntrblm
70.1 × 22.5 mm38 parts2LCC-BY-SA-4.05
MZ80AV
Board-Folk
119 × 63.1 mm29 parts2LNo license5
APC
UEPro
90 × 43 mm24 parts2LNo license5
HagiwoEurorackMixer
fablabnk
29 × 106 mm24 parts2LNo license5
AVR/ArduinoS1nT
usini
127 × 49.5 mm20 parts2LMIT5
Mrmidi
chatoooo
70.5 × 57.2 mm13 parts2LGPL-3.05
EurorackPowerBreakout
johnsquibb
22.9 × 52.1 mm13 parts2LMIT5
Vectrex stereo ay
technobly
20.8 × 36.1 mm12 parts2LCC-BY-NC-4.05
Midi uart adapter
tschiemer
39.4 × 48.3 mm11 parts2LMIT5
Nearness black gold panel
bmoren
15 × 128.5 mm0 parts2LCC-BY-NC-4.05- schematic only · 53 partsSTM32
Wmd6c servo
ChipCreates
53 partsMIT5 
ESP32ESP32 battery management module
KomplexKapharnaum
173.5 × 192.5 mm828 parts4LMIT4
Browse boards by part
AMS1117-3.3 899USBLC6-2SC6 763RP2040 566W25Q128JVS 345AP2112K-3.3 273TL072 269TL074 250ESP32-S3-WROOM-1 229CH340C 221L7805 208Pico 19274HC595 185USBLC6-2P6 174LM358 16874LS04 160SRV05-4 158AP2112K-3.3TRG1 154ESP32-WROOM-32 15374LS245 14474LS138 138W25Q128JVSIQ 135Arduino_Nano_v3.x 13474LS00 133TP4056 130