856 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.
Ribbon synth
ideocentric
50.8 × 101.6 mm16 parts2LMIT1
RP2040/RP2350Sonibox
trappitsch
100 × 110 mm16 parts2LMIT1
AudioAmplifier-5600x
Rohan317685
40 × 30 mm13 parts2LMIT1
ESP32WiFi Radio Project
Minall13
111 × 69 mm9 parts2LCC-BY-NC-4.01
Raspberry PiBluetooth audio tx
Unosoluciones
85 × 55 mm7 parts2LNo license1
ESP32Nudge
TheOtherTwinCoder
31 × 42.6 mm4 parts2LNo license1- schematic only · 84 parts
Circuit codex
TheAnalogMaker
84 partsMIT1 - schematic only · 1 partsESP32
Nest audio
spandit69
1 partsCERN-OHL-S-2.01 
Twelve channel
Brunner-neutrino-lab
213.2 × 334.7 mm464 parts4LNo license0
NXPQuad Preamp and 4-Channel Ambisonic Recorder
jdg511
138 × 114 mm298 parts4LNo license0
ESP32Handset
JeremyLakeyJr
66 × 142 mm217 parts4LNo license0
AGBM-02 AA 1-1
AnasSarkiz
131.3 × 72.4 mm200 parts4LCC-BY-SA-4.00
FPGACourant
KrasForge
160 × 100 mm180 parts6LMIT0
STM32ChromaDeck
FBIopeningUPP
160 × 160.1 mm152 parts6LMIT0
AVR/ArduinoDigital synth
giacomogramaglia
165 × 90.1 mm135 parts2LNo license0
VCO
Desval27
160 × 233.4 mm129 parts2LMIT0
ESP32Prod board
family-mruby
90 × 70 mm125 parts4LCERN-OHL-S-2.00
Phono adc eval
birdybro
130 × 90 mm119 parts4LGPL-3.00
RP2040/RP2350River
HenryLi-0
56 × 80 mm118 parts2LCERN-OHL-S-2.00
NXPMcguitarpedal
frsaba
123 × 113.5 mm113 parts2LNo license0
ESP32Alec main
eshelton328
64 × 56 mm112 parts4LNo license0
ESP32Guitar pedal
MaxTeicheiraUCSC
150 × 102 mm107 parts2LGPL-3.00
RP2040/RP2350Trinketcore
alph4345
40 × 60 mm106 parts4LNo license0
ESP32Poket
kaorii-ako
80 × 54 mm100 parts4LMIT0
STM32ANUFS-APPPD
chithigun23
58.9 × 48.4 mm99 parts4LNo license0
ESP32Rainbow music pegasus
adamm
151 × 31 mm96 parts2LApache-2.00
Nordic nRFMUSIC-PLAYER
Ace6Rings
50 × 50 mm93 parts6LMIT0
Goya1746
escaroda
115 × 70 mm83 parts2LMIT0
RP2040/RP2350ESP-HI-PLUS
dyu134
58 × 35 mm83 parts4LNo license0
RP2040/RP2350Ghost fader
chris-albert
108 × 80 mm82 parts2LNo license0
ESP32Esp32-sensor board
marwantm
99.6 × 55.9 mm80 parts4LNo license0
PCB Analysis-Isolated Screen
meandthetrio
165.1 × 101.6 mm78 parts2LNo license0
ESP32Isc motorbeep
ISC-HEI
70 × 50 mm69 parts4LNo license0
ULNA-Lband-2S
cfbird
60 × 35 mm68 parts4LMIT0
Analog audio visualizer
alimleahat
130 × 100 mm65 parts2LNo license0
Stereo amp module
copperWhispers
65.2 × 45.2 mm61 parts2LCustom license0
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