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.
ESP32Marble sequencer control circuits
felicien-brochu
112 × 81 mm27 parts2LNo license0
Csp cr112
Brunner-neutrino-lab
90 × 72 mm22 parts4LNo license0
Faceplate before
dpaola2
52 × 94.2 mm22 parts2LNo license0
GOLReader
gatechipdl
16 × 60 mm20 parts2LMIT0
Front Plate
jonaheinke
103 × 30.5 mm11 parts2LMIT0
Display
JamesB-Wood
26 × 34 mm9 parts2LCERN-OHL-S-2.00
Reproductor de audio - AquarWorld
IvanBarrientos16
39 × 38.5 mm8 parts2LNo license0
RP2040/RP2350Segno led strip
tomassasovsky
16 × 8 mm4 parts2LGPL-3.00- schematic only · 29 parts
Cvbs decomposer
ckarcz
29 parts2LMIT0 - schematic only · 9 parts
Regulator-5v
carr-james
9 parts2LNo license0 
USB
shanteacontrols
52 × 12.6 mm6 parts2LApache-2.0956
Cv in
ohmtech-rdi
25 × 19 mm13 parts2LCC-BY-SA-4.0405
AddOnA
freeDSP
178 × 39 mm55 parts2LCC-BY-SA-4.0222
AVR/ArduinoPortableTerminal
profdc9
79 × 75 mm76 parts2LNo license221
Sidechain mixer core
shmoergh
58 × 65 mm62 parts2LNo license214
Simplemixsmall
nickajeglin
42.6 × 80 mm59 parts2LNo license207
Ad9864 breakout
loxodes
44 × 39 mm83 parts4LNo license206
AVR/ArduinoKicad cpu board smt
matthewcieplak
78.5 × 69 mm56 parts2LNo license172
Baby 8
mzuelch
68.6 × 107.3 mm62 parts2LMIT165
Zynthiandac bk2
zynthian
64 × 55 mm81 parts2LNo license154
4ch Sampler main
ijnekenamay
30 × 100 mm31 parts2LNo license142
Psu
71.1 × 38.1 mm3 parts2LNo license123
Switch board
FOSDEM
84 × 83 mm97 parts4LNo license114
Oneshot
tpcarlson
141.9 × 39.7 mm136 parts4LNo license106
RP2040/RP2350TINRS - Wobbler (pico)sch
ThisIsNotRocketScience
60.3 × 106.5 mm180 parts2LMIT87
Raspberry PiAS3397-Conductor
PhysicsDptAngers
97.3 × 97.8 mm53 parts2LMIT87
Pico 2HP Controls
rheslip
10 × 110.5 mm13 parts2LNo license82
Eddie Baby Custom
a-wai
230 × 120 mm57 parts2LGPL-3.076
Mynd USB JACK
teufelaudio
23 × 20.8 mm38 parts2LCC-BY-SA-4.076
ESP32TRSIO
apuder
93.3 × 80.6 mm33 parts2LGPL-3.074
Raspberry PiZoxnoxious Backplane and VCA
brer-rabbit
133.8 × 102.9 mm86 parts4LGPL-3.068
RP2040/RP235016bit
bread-modular
30.5 × 68.6 mm58 parts2LMIT65
AceA01
gzweigle
24.1 × 46.7 mm26 parts2LGPL-3.060
AVR/ArduinoLineinterrupter
74.4 × 99.3 mm85 parts2LNo license56
Link adapter
jkominek
77.5 × 40.6 mm38 parts2LCustom license53
Eurorack Dual Mixer
Len42
40.3 × 108.2 mm71 parts2LNo license50
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