740 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.
Echo state module
etrautmann
154 × 121 mm166 parts4LNo license2
STM32Dual Slope Generator
JordanAceto
99.1 × 99.1 mm163 parts2LCC-BY-4.02
STM32Mixed-Signal-Guitar-Effects-Pedal
danromero1
60 × 75 mm110 parts4LMIT2
Ogham merged v1.0
keeos-io
50 × 110 mm108 parts2LCustom license2
ESP32KINK-box
FunDeckHermit
100 × 60 mm103 parts2LApache-2.02
Mixer-W-Output-HP
twam
50 × 50 mm79 parts4LNo license2
Usbc synth psu
mattvenn
95 × 35 mm75 parts2LNo license2
HighZ-stereo
Supermagnum
62.5 × 97.5 mm69 parts2LCC-BY-4.02
HackableDelay
benjiaomodular
86.4 × 58.4 mm58 parts2LCC-BY-4.02
DaisyDelayHardware
fablabnk
30 × 128.5 mm53 parts2LNo license2
PicoDAC
Person-0
35.1 × 58.3 mm42 parts4LNo license2
ESP32Kiki player
alaotach
86 × 109.7 mm42 parts2LNo license2
Guitar-Amp
james-wren
184.5 × 61 mm28 parts2LMIT2
Joselito
abierto-cc
34.9 × 70.4 mm25 parts2LNo license2
OpenVocakey
Milk-Cool
171.5 × 99.1 mm19 parts2LMIT2
Open euro converter
jeigrei
38.2 × 108.1 mm15 parts2LCC0-1.02
RoboTheater
offmor
32 × 32 mm14 parts2LMIT2
KoalaByte-Zero
greatwhitek9-lab
120 × 85 mm1 parts2LNo license2- schematic only · 40 partsESP32
Moto Audio
bacnbit
40 partsNo license2 
Josh Ox Ribbon Synth Main VCO board
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
Synth psoc v1
pmusgrave
203.2 × 101.6 mm243 parts4LNo license1
STM32Anthracite PCB (Bottom)
trope-oshw
60 × 73.5 mm208 parts4LCERN-OHL-S-2.01
ESP32Wooden Clock - main board
tibm
110 × 110 mm183 parts4LNo license1
Eurorack-DIST
cookiemonsternz
105 × 100 mm173 parts2LNo license1
MXKeys
velvia-fifty
202.6 × 128.5 mm164 parts2LCC-BY-NC-4.01
Cyberdeck Carrier for LattePanda Mu
imtua
160 × 80 mm147 parts4LGPL-3.01
Eurorack busboard singlerow
yry-dev
414 × 62 mm146 parts4LMIT1
Raspberry PiUsb3.1-Ethernet-RP2040-I2S HUB
Tanawin1701d
100 × 100 mm136 parts4LNo license1
Noise toaster
adeboni
128 × 129 mm133 parts2LGPL-3.01
Mixer
masl123
60 × 102 mm130 parts2LTAPR-OHL-1.01
ClassH PCB FINAL
OSHE-Github
152.4 × 82.6 mm105 parts2LNo license1
ESP32Reverb
DynamicWhiteHat
82.6 × 74.3 mm102 parts2LNo license1
Speek amp
JBlitzar
120 × 80 mm98 parts2LGPL-3.01
Browse boards by part
AMS1117-3.3 345USBLC6-2SC6 296RP2040 224W25Q128JVS 135TL072 118CH340C 116AP2112K-3.3 103ESP32-S3-WROOM-1 97TL074 94AP2112K-3.3TRG1 82SRV05-4 73W25Q128JVSIQ 73USBLC6-2P6 70Pico 52L7805 50XC6206P332MR 50MCP73831T-2ACI/OT 49SN65HVD230 49AMS1117-5.0 48ESP32-S3-WROOM-1-N16R8 48LM393 44BME280 43DW01A 43LAN8710A-EZC(QFN32) 43