2,292 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.
AVR/ArduinoPcb mixer
anqueue
113 × 76 mm6 parts2LNo license1
ESP32Bonsai
devvazquez
41 × 23 mm6 parts2LMIT1
Pcb ae2 soundlink usb c
TimGoll
18.5 × 12.1 mm6 parts2LNo license1
TalkbackPedal
RoMadrigal
68.5 × 37.4 mm5 parts2LMIT1
ESP32Nudge
TheOtherTwinCoder
31 × 42.6 mm4 parts2LNo license1
SH101 MOD GRIP BOARD
minisystem
40.5 × 36.1 mm4 parts2LNo license1
SpeakerAdapter
mignon-p
14 × 15.5 mm2 parts2LCC-BY-SA-4.01
Pedal master
keotl
53.3 × 54.6 mm0 parts2LMIT1- schematic only · 140 parts
Synth32
markeby
140 partsNo license1 - schematic only · 106 parts
Eurorack-3330-Dual-Lin-Exp-VCA
DIYSynthMNL
106 partsNo license1 - schematic only · 100 parts
Triton-540
dmsmccann
100 partsNo license1 - schematic only · 98 parts
Meyer Sound 24.033.003 Amp RevEng
LeoDJ
98 partsNo license1 - schematic only · 90 parts
SuperProbe simulations
knud
90 partsNo license1 - schematic only · 84 parts
Circuit codex
TheAnalogMaker
84 partsMIT1 - schematic only · 74 parts
Jensx1000
icnagy
74 partsCERN-OHL-S-2.01 - schematic only · 38 parts
Softy
Broosky
38 partsNo license1 - schematic only · 34 partsRP2040/RP2350
64-controller to midi converter
turboOrange
34 partsNo license1 - schematic only · 25 parts
Stereo-Plasma-Speaker
Firestorm108
25 partsNo license1 - schematic only · 22 parts
OHIS BT
Reid-n0rc
22 partsCC-BY-NC-4.01 - schematic only · 22 parts
Soney
22 partsNo license1 - schematic only · 22 parts
Pulse
22 partsNo license1 - schematic only · 13 parts
Digital sine wave generator
inderjit303
13 partsNo license1 - schematic only · 8 partsESP32
Esp32-mp3-music player
404jaspernotfound
8 partsMIT1 - schematic only · 5 partsESP32
Smart glasses ai
yashanandingole12-gif
5 partsNo license1 - schematic only · 1 partsESP32
Nest audio
spandit69
1 partsCERN-OHL-S-2.01 
STM32SIGMAGE
allogic
120 × 170 mm725 parts6LMIT0
STM32KHEops70
mgsg
285 × 94.6 mm477 parts4LGPL-3.00
Twelve channel
Brunner-neutrino-lab
213.2 × 334.7 mm464 parts4LNo license0
RP2040/RP2350Rf switchboard
Erhannis
100 × 174.6 mm463 parts4LNo license0
ESP32RX8-7(Finished BeforeESPChange)
bradport02
165.3 × 123.7 mm407 parts4LNo license0
PICMsfOwlClock
pete-restall
130.1 × 183.6 mm378 parts4LMIT0
RP2040/RP2350IoAmp200W
ilolson
85.5 × 54 mm365 parts6LMIT0
Front-Stage-3-Channel-AB
bunny-assassin
240 × 160 mm318 parts4LNo license0
NXPQuad Preamp and 4-Channel Ambisonic Recorder
jdg511
138 × 114 mm298 parts4LNo license0
FPGANeuraCore
NeuraCoreTech
120 × 60 mm295 parts8LNo license0
RP2040/RP2350Cv module
pythagorean-comma
107 × 233.6 mm289 parts4LNo license0
Browse boards by part
AMS1117-3.3 1069USBLC6-2SC6 866RP2040 632W25Q128JVS 394TL072 319AP2112K-3.3 313TL074 281ESP32-S3-WROOM-1 268CH340C 249L7805 229Pico 22174HC595 218USBLC6-2P6 206LM358 20074LS04 180AP2112K-3.3TRG1 179ESP32-WROOM-32 169LM7805_TO220 167SRV05-4 165Arduino_Nano_v3.x 16474LS245 160W25Q128JVSIQ 15774LS138 15574LS32 152