2,590 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.
Power Distribution
BruteClaw
210 × 80 mm31 parts2LGPL-3.010
MSSOP
lennartquerter
19.2 × 14.2 mm4 parts2LCC-BY-NC-4.010
AvalancheVCO
VincentPeters
96.5 × 20.3 mm21 parts2LNo license9
PaddleSwitch wH 1U16HP2x1Av2
MostlyCoraGrace
80.9 × 39.7 mm9 parts2LMIT6
Encoders
apaleslimghost
55.9 × 55.9 mm8 parts2LMIT5
Yaesu-6p6c
open-headset-interconnect-standard
27.3 × 30.5 mm3 parts2LCC-BY-4.05
RP2040/RP2350AudioMixer Duo LBB
gfm16617
100 × 85.3 mm27 parts2LNo license3
Bustermination
Synthron
160 × 100 mm20 parts2LNo license3
STM32VCF carrier board
JordanAceto
99.1 × 99.1 mm52 parts2LCC-BY-4.02
LFO
PancakeLegend
30 × 100 mm20 parts2LGPL-3.02
NXPPedal Load
sundevilmotorsports
73.9 × 63.6 mm19 parts2LNo license2
Connspiracy Theory
velvia-fifty
100 × 100 mm24 parts2LCC-BY-NC-4.01
Line out
adeboni
9.8 × 104 mm16 parts2LGPL-3.01
Cnc mill pcb tester
Wierdwizard2587
47 × 25.4 mm7 parts2LNo license1
Eingang
FordPrfkt
47.5 × 38.7 mm6 parts2LNo license1
RISC-VDAC-HPA — 100 × 80 comparison placement
ooyang0325
100 × 80 mm470 parts4LNo license0
NXPQuad Preamp and 4-Channel Ambisonic Recorder
jdg511
138 × 114 mm180 parts4LNo license0
RP2040/RP2350Mcu vcore source cell rejected
dcuccia
44.5 × 48.4 mm84 parts4LMIT0
Noname
blthree
96.8 × 81.5 mm63 parts2LNo license0
RING MODULATOR
Desval27
160 × 100 mm60 parts2LMIT0
AVR/ArduinoMain
rhinocerose
30 × 110.5 mm49 parts2LNo license0
ESP32MusicBrain AXON - ESP32-S3 netbridge
MarkWestbroek
70 × 45 mm48 parts2LMIT0
STM32Test zero flawless
akularya6-del
15 × 31 mm38 parts4LNo license0
Amplifier5000
MECSEM
37.5 × 22 mm37 parts4LGPL-3.00
STM32Player melodic
bmurauer
18 × 100 mm30 parts2LNo license0
Adar
eblade
66 × 99.1 mm28 parts2LNo license0
Nref wifi
cetola
66 × 33 mm23 parts2LNo license0
PSPK Speaker amplifier module
pozsarzs
48.3 × 57.2 mm16 parts2LEUPL-1.20
WavetableVCO Panel
Fora888
61 × 128 mm12 parts2LMIT0- schematic only · 5 parts
Power input
carr-james
5 parts2LNo license0 
Slider
ohmtech-rdi
17 × 35.5 mm7 parts2LCC-BY-SA-4.0405
Util lfo stripboard
nickajeglin
27.9 × 47 mm21 parts2LNo license207
Adc cape
loxodes
78.1 × 77.5 mm22 parts4LNo license206
Rectifier Main
mzuelch
38.1 × 101.6 mm33 parts2LMIT165
Zynthian allinone
zynthian
119.4 × 30.5 mm31 parts2LNo license154
RP2040/RP2350Oak
tpcarlson
35 × 128.5 mm99 parts2LNo license106
Browse boards by part
AMS1117-3.3 1287USBLC6-2SC6 1056RP2040 725W25Q128JVS 444AP2112K-3.3 408TL072 347ESP32-S3-WROOM-1 324TL074 308CH340C 290L7805 29074HC595 267USBLC6-2P6 260Pico 258LM358 237AP2112K-3.3TRG1 22474LS04 207ESP32-WROOM-32 203Arduino_Nano_v3.x 202LM7805_TO220 20174LS245 18474LS138 176SRV05-4 17674LS08 17574LS32 175