2,215 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.
IQ Modulator
antonjan
39.5 × 46 mm72 parts2LGPL-3.07
ESP32WLED-Controller
LostInCompilation
100 × 100 mm63 parts2LNo license7
ESP32Slider synth
udu3324
94.6 × 25 mm49 parts2LGPL-3.07
ESP32Mlehaptics
lemonforest
37.3 × 27.8 mm29 parts2LGPL-3.07
Bisect
cyberboy666
90 × 55 mm29 parts2LGPL-3.07
AVR/ArduinoArduino-Nano-FM-Radio-Si4703
TeknoTrek
95.5 × 104.7 mm15 parts2LNo license7
Kakuhomaru bridge
penk
43.2 × 18.5 mm10 parts2LMIT7
Encoder backlight
dwhinham
16 × 20.8 mm8 parts2LCC-BY-SA-4.07
Cd changer emulator
akreager
22 × 80 mm5 parts2LMIT7- schematic only · 10 partsAVR/Arduino
Korg ms20m extra midi2cv
retango
10 partsGPL-3.07 
Ultimate soldering exercise
dvhx
99 × 99 mm464 parts2LGPL-3.06
FreeDSP-G
freeDSP
170 × 101 mm367 parts4LCC0-1.06
Sonus7 rev1
BasementCircuits
200 × 87.8 mm257 parts2LCERN-OHL-W-2.06
Music Visualizer
GhanGhan
295 × 155 mm253 parts2LNo license6
FreeDSP Classic SMD AB plus-II
CyberPit
134 × 109.5 mm225 parts2LNo license6
VCF and VCO
promesoft
100 × 100 mm182 parts2LNo license6
Phasor II
JordanAceto
84.5 × 108.3 mm178 parts2LCC-BY-4.06
ESP32ChrisBox
TUDA-MUST
78 × 46.3 mm177 parts4LCC-BY-4.06
ESP32T dsp desktop pro
t-dsp
120 × 100 mm135 parts8LCC-BY-NC-4.06
ESP32T dsp core
100 × 100 mm131 parts4LCC-BY-NC-4.06
Output mixer
mohoyt
40 × 99 mm114 parts2LCERN-OHL-S-2.06
ResFFB
benregnier
40.1 × 108 mm111 parts2LNo license6
RP2040/RP2350Platform16
lerouxb
112 × 86.3 mm108 parts2LNo license6
PICMarine GPS
mbouyer
160 × 100 mm107 parts2LBSD-2-Clause6
Arc module
andrew-bolin
100 × 85 mm85 parts2LNo license6
Pangaea cp16
ildus
46.2 × 85.5 mm77 parts2LNo license6
T dsp tac5212 pro audio module
41.3 × 26.5 mm75 parts4LCC-BY-NC-4.06
Laboratory-Instrumentation-Amplifier with-16bit-1MSPS-ADC
drmcnelson
60 × 40 mm74 parts4LCC-BY-NC-4.06
STM32Nano-Tek
stefanskotte
51 × 42 mm41 parts4LNo license6
NXPHs lr midi schwurbler
mommel
153.4 × 98.5 mm40 parts2LCC-BY-NC-4.06
ToggleSwitch wH 1U44HP6x1Av2
MostlyCoraGrace
223.2 × 39.7 mm25 parts2LMIT6
NeoBit
mignon-p
77.5 × 45.7 mm25 parts2LCC-BY-SA-4.06
Backporch
semi-simple
53.3 × 32.4 mm25 parts2LApache-2.06
AmigaStereoMixer
dschneller
47 × 37.3 mm16 parts2LNo license6
MIDI Output Breakout Board
TuDo-Makerspace
20.3 × 50.9 mm11 parts2LNo license6
Pcb stator
dakata1337
92.5 × 126.1 mm1 parts2LGPL-2.06
Browse boards by part
AMS1117-3.3 899USBLC6-2SC6 763RP2040 566W25Q128JVS 345AP2112K-3.3 273TL072 269TL074 250ESP32-S3-WROOM-1 229CH340C 221L7805 208Pico 19274HC595 185USBLC6-2P6 174LM358 16874LS04 160SRV05-4 158AP2112K-3.3TRG1 154ESP32-WROOM-32 15374LS245 14474LS138 138W25Q128JVSIQ 135Arduino_Nano_v3.x 13474LS00 133TP4056 130