2,558 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.
RX8-8
bradport02
2.9 × 2 mm29 parts2LNo license0
WiredButtonDriver
radionerd
78.7 × 22.9 mm29 parts2LNo license0
AVR/ArduinoNSSL EFM Charge Amplifier
LeemanGeophysicalLLC
44.5 × 31.8 mm27 parts4LNo license0
Faceplate net aware before refill
dpaola2
52 × 94.2 mm22 parts2LNo license0
Shaper
Brunner-neutrino-lab
168 × 80 mm22 parts4LNo license0
FaderBoard
8-Lambda-8
80 × 80 mm22 parts2LGPL-3.00
GOLReader Panel12
gatechipdl
192 × 60 mm20 parts2LMIT0
MIDI marble sequencer controls channel select
felicien-brochu
252 × 25 mm18 parts2LNo license0
Vinyl adc digital
MadsRudolph
100 × 100 mm18 parts2LNo license0
Pmod US Speaker
Lathe-Mariel
99.3 × 20.3 mm16 parts2LNo license0
Amplifier
leonardobove
35.6 × 26.2 mm16 parts2LNo license0
Audio day30
baleshwarece-jpg
34 × 26.5 mm12 parts2LNo license0
Proejtc
jeff4444
31.5 × 24.5 mm4 parts2LNo license0- schematic only · 8 parts
Cv mux-8
carr-james
8 parts2LNo license0 
Power bus
ohmtech-rdi
37 × 21.5 mm9 parts2LCC-BY-SA-4.0405
RP2040/RP2350Blep audio
CRImier
60.6 × 24.1 mm75 parts2LGPL-3.0253
BandPassFilter
profdc9
98 × 84 mm72 parts2LNo license221
Default patch
shmoergh
210.7 × 32.5 mm20 parts2LNo license214
Mix
nickajeglin
47 × 79.8 mm56 parts2LNo license207
Synth
loxodes
47 × 27.5 mm80 parts4LNo license206
AVR/ArduinoHAGIWO Sync LFO Main
mzuelch
29.2 × 101.6 mm50 parts2LMIT165
Zynthiandac
zynthian
64 × 55 mm75 parts2LNo license154
AVR/ArduinoSampler
ijnekenamay
29 × 99.5 mm31 parts2LNo license142
NXPMv2 base
FOSDEM
69 × 64 mm73 parts4LNo license114
RP2040/RP2350D6
tpcarlson
80.5 × 128.5 mm133 parts4LNo license106
RP2040/RP2350TiNRS Wobbler2
ThisIsNotRocketScience
60.3 × 106.5 mm180 parts2LMIT87
Carte BUS 1
PhysicsDptAngers
100 × 100 mm52 parts2LMIT87
MYNDberry
teufelaudio
83.8 × 45.7 mm20 parts2LCC-BY-SA-4.076
Lb-80
apuder
30.6 × 21 mm7 parts2LGPL-3.074
Zoxnoxious 2203 FM Operator Type-N (OPN)
brer-rabbit
80 × 80 mm34 parts4LGPL-3.068
Imix
bread-modular
30.5 × 68.6 mm58 parts4LMIT65
AceA01-eth
gzweigle
25 × 59.1 mm22 parts2LGPL-3.060
AVR/ArduinoInterrupter
79.3 × 97 mm80 parts2LNo license56
Sensorboard tester
jkominek
83.8 × 83.8 mm33 parts2LCustom license53
Eurorack Dual Filter Module
Len42
50.3 × 108.2 mm70 parts2LNo license50
4bp NOZIFF MD9
RIP-Felix
38.8 × 47.4 mm108 parts2LCERN-OHL-S-2.047
Browse boards by part
AMS1117-3.3 1261USBLC6-2SC6 1030RP2040 714W25Q128JVS 441AP2112K-3.3 400TL072 342ESP32-S3-WROOM-1 314TL074 308CH340C 287L7805 28374HC595 258Pico 256USBLC6-2P6 256LM358 233AP2112K-3.3TRG1 21974LS04 204Arduino_Nano_v3.x 201ESP32-WROOM-32 199LM7805_TO220 19774LS245 17874LS138 174SRV05-4 17474LS32 171W25Q128JVSIQ 171