2,492 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.
DuDad Panel
shannon-greenlight
60.6 × 39.7 mm5 parts2LNo license1- schematic only · 19 parts
Sheet Title
DIaLOGIKa-GmbH
19 parts2LMIT1 
NXPQuad Preamp and 4-Channel Ambisonic Recorder
jdg511
138 × 114 mm242 parts4LNo license0
Hdmi edp2
cetola
43.5 × 32.5 mm93 parts4LNo license0
STM32Mixed signal Board Rev E
Akhilesh-design-02
47.1 × 45.4 mm88 parts4LNo license0
RP2040/RP2350Imu coupled working
dcuccia
44.5 × 48.4 mm84 parts4LMIT0
Vco4069
blthree
99.1 × 99.1 mm84 parts2LNo license0
ADSR
Desval27
160 × 100 mm82 parts2LMIT0
GSwitch LOOP8-SH - 8x relaisloop compact (schroefklemmen)
MarkWestbroek
150 × 44 mm69 parts2LMIT0
04 diode ladder vcf
bmurauer
30 × 100 mm66 parts2LNo license0
Vco
eblade
99.1 × 99.1 mm60 parts2LNo license0
808 bass drum1
rhinocerose
14.9 × 89.5 mm56 parts2LNo license0
Math-Module
carl-becker
60 × 60 mm40 parts2LNo license0
STM32Speaker
sean618
56.5 × 25 mm40 parts2LMIT0
STM32Test rf clean corridor
akularya6-del
15 × 31 mm38 parts4LNo license0
USB-C 3A PSU
Fora888
15.2 × 99.1 mm32 parts2LMIT0
Power Delivery
Network-Direction
69.9 × 32.8 mm31 parts2LNo license0
RX8-8
bradport02
2.9 × 2 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
FaderBoard
8-Lambda-8
80 × 80 mm22 parts2LGPL-3.00
Shaper
Brunner-neutrino-lab
168 × 80 mm22 parts4LNo license0
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
Amplifier
leonardobove
35.6 × 26.2 mm16 parts2LNo license0
Pmod US Speaker
Lathe-Mariel
99.3 × 20.3 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
Browse boards by part
AMS1117-3.3 1196USBLC6-2SC6 983RP2040 699W25Q128JVS 421AP2112K-3.3 376TL072 339TL074 307ESP32-S3-WROOM-1 304CH340C 274L7805 271Pico 25174HC595 248USBLC6-2P6 248LM358 228AP2112K-3.3TRG1 205Arduino_Nano_v3.x 19774LS04 193LM7805_TO220 185ESP32-WROOM-32 18274LS245 171SRV05-4 169W25Q128JVSIQ 16974LS138 16274LS32 161