2,252 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.
AudioAmpEELv2
ADolbyB
81.5 × 44 mm25 parts2LNo license2
GettingToBlinky
arildj78
91.5 × 61 mm22 parts2LMIT2
C128-dcr dual sid
ytmytm
67.8 × 41 mm19 parts2LMIT2
OpenVocakey
Milk-Cool
171.5 × 99.1 mm19 parts2LMIT2
Kicad swr meter
s59mz
70 × 50 mm16 parts2LGPL-3.02
A2b
spikekips
58.4 × 66.7 mm16 parts2LCERN-OHL-S-2.02
Left board
flof-codes
40.3 × 21 mm16 parts2LGPL-3.02
RISC-VRca tester
tvecera
37.3 × 55.6 mm16 parts2LMIT2
Open euro converter
jeigrei
38.2 × 108.1 mm15 parts2LCC0-1.02
Kinesis Advantage-Proton C
thirteen37
122 × 86 mm15 parts2LNo license2
RoboTheater
offmor
32 × 32 mm14 parts2LMIT2
KoalaByte-Zero
greatwhitek9-lab
120 × 85 mm1 parts2LNo license2
3PDT-GenericDaughterboard
eddcad
31.5 × 26.7 mm0 parts2LGPL-3.02- schematic only · 86 partsRP2040/RP2350
USB AudioInterface 2i2 Pico2
altura-dsp
86 partsGPL-3.02 - schematic only · 70 parts
Eurorack-3340-VCO
DIYSynthMNL
70 partsNo license2 - schematic only · 69 parts
Eurorack-3310-ADSR
69 partsNo license2 - schematic only · 40 partsESP32
Moto Audio
bacnbit
40 partsNo license2 
PICAmp board
Alex-Wolfe
223.5 × 147.3 mm674 parts4LNo license1
STM32SmallDSP Maxi
Gemuesesaft
120 × 120 mm511 parts4LGPL-3.01
Voice
minisystem
133.4 × 50 mm426 parts2LNo license1
Dogrudan sdr C
kocer
350 × 235 mm392 parts2LNo license1
STM32Stm audio board v3 dsp board
Papproni
265 × 117 mm391 parts4LMIT1
FPGASN-64
FantomZap
101.8 × 80.5 mm383 parts6LNo license1
Josh Ox Ribbon Synth Main VCO board
JordanAceto
170.2 × 213.4 mm349 parts2LCC-BY-4.01
BitForge-SDR
HarrySkySon
100 × 85 mm332 parts6LCERN-OHL-S-2.01
ESP32ESP32S3 Audio Cam POE
jharvey
109.4 × 129.7 mm320 parts4LMIT1
RP2040/RP2350Thor's Arsenal
shannon-greenlight
70.8 × 110 mm300 parts4LGPL-3.01
Mega frank u4
evgs
149.9 × 99.5 mm256 parts2LNo license1
Synth psoc v1
pmusgrave
203.2 × 101.6 mm243 parts4LNo license1
MRIAMP
msayad97
150.3 × 132.3 mm234 parts4LNo license1
Marvelous65-split
tjk911
345.3 × 107.2 mm215 parts2LNo license1
STM32Anthracite PCB (Bottom)
trope-oshw
60 × 73.5 mm208 parts4LCERN-OHL-S-2.01
NXPModular
zevv
85 × 85 mm203 parts2LBSD-2-Clause1
STM32Card v0.1
northernpaws
67.6 × 35.4 mm189 parts6LCERN-OHL-S-2.01
ESP32Wooden Clock - main board
tibm
110 × 110 mm183 parts4LNo license1
Eurorack-DIST
cookiemonsternz
105 × 100 mm173 parts2LNo license1
Browse boards by part
AMS1117-3.3 1034USBLC6-2SC6 836RP2040 609W25Q128JVS 388TL072 309AP2112K-3.3 308TL074 274ESP32-S3-WROOM-1 266CH340C 242L7805 224Pico 21874HC595 213USBLC6-2P6 200LM358 19074LS04 175AP2112K-3.3TRG1 173ESP32-WROOM-32 167SRV05-4 165Arduino_Nano_v3.x 15974LS245 156LM7805_TO220 15574LS138 152W25Q128JVSIQ 15174LS32 148