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.
STM32Player drum velocity
bmurauer
18 × 100 mm32 parts2LNo license0
Nref wifi m2
cetola
66 × 24 mm28 parts4LNo license0
Illuminate7mk2-crossover
MadsRudolph
148 × 100 mm23 parts2LNo license0
VCA Panel
Fora888
55.9 × 128 mm18 parts2LMIT0
Microduck Audio MIC R3
ldcyes
20 × 14 mm10 parts2LNo license0
CAT XLR pannel
8-Lambda-8
94 × 120 mm9 parts2LGPL-3.00
PCMountButtonDriver
radionerd
55.9 × 21.5 mm6 parts2LNo license0
Microphone
satomm1
20.8 × 15 mm3 parts2LMIT0- schematic only · 6 parts
Gate output
carr-james
6 parts2LNo license0 
Gate out
ohmtech-rdi
20 × 19 mm7 parts2LCC-BY-SA-4.0405
LowPassFilter
profdc9
35.6 × 26.4 mm11 parts2LNo license221
Util LFO
nickajeglin
27.2 × 37.1 mm23 parts2LNo license207
Amp macom vga
loxodes
27 × 31.5 mm48 parts4LNo license206
Sample and Hold SMD Main
mzuelch
38.1 × 101.6 mm41 parts2LMIT165
Zynth encoder power display fan
zynthian
65 × 56 mm34 parts2LNo license154
Radxa hat
FOSDEM
65 × 20.4 mm8 parts2LNo license114
Vcvco
tpcarlson
50.1 × 128.5 mm104 parts2LNo license106
RP2040/RP2350Main board
PhysicsDptAngers
77.2 × 76.1 mm14 parts2LMIT87
StepDriver route
hirakuni45
32 × 37 mm19 parts2LBSD-3-Clause86
Mynd Conn
teufelaudio
27 × 54 mm15 parts2LCC-BY-SA-4.076
Svf
bread-modular
30.5 × 68.6 mm34 parts2LMIT65
Pls00
gzweigle
34.3 × 6.4 mm5 parts2LGPL-3.060
Usb led power
jkominek
80 × 40 mm15 parts2LCustom license53
Eurorack 4-Pole Filter
Len42
50.3 × 102.6 mm60 parts2LNo license50
Divn
niektb
20 × 100 mm60 parts2LCC-BY-SA-4.034
Ssd1332 breakout
libresmartphone
21 × 16.9 mm15 parts2LNo license33
KickAid Main
Thorinair
39.8 × 108.6 mm75 parts2LCC-BY-SA-4.025
Vm130-audio out
mirdej
47.9 × 46.4 mm52 parts2LNo license23
ESP32Sum25 Wand v2
collaborative-music-lab
245 × 30 mm19 parts2LNo license19
MiSTeryNano MIDI Shield
MiSTle-Dev
57 × 57 mm35 parts2LNo license17
PICScope
telec16
30 × 200 mm46 parts2LNo license16
Tonemachine
bubbajfett
58 × 42.1 mm47 parts2LCC0-1.014
Sloth
mort13
19.1 × 110 mm40 parts2LGPL-3.012
DualValmorFrontBoard
banjomasterpete
60 × 110 mm22 parts2LNo license12
SSI2140 LPF
JordanAceto
58.4 × 50.8 mm55 parts2LCC-BY-4.011
BIGRIG OUTPUT
powsplatboom
30 × 70 mm25 parts2LNo license11
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