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.
Midi controller
petitechose-midi-studio
164 × 164 mm112 parts4LCERN-OHL-S-2.00
ESP32Alec main
eshelton328
64 × 56 mm112 parts4LNo license0
ESP32Alec main
64 × 56 mm112 parts4LNo license0
Guitar effects processor---Hardware
Tutu72byte
83 × 57 mm111 parts4LNo license0
VCO
carl-becker
100 × 100 mm108 parts2LNo license0
ESP32Guitar pedal
MaxTeicheiraUCSC
150 × 102 mm107 parts2LGPL-3.00
RP2040/RP2350Synthetizer
ImMagni
406 × 90 mm106 parts2LMIT0
Turtable control board hbridge
trublion
89.4 × 50 mm106 parts2LMIT0
RP2040/RP2350Trinketcore
alph4345
40 × 60 mm106 parts4LNo license0
Angry squealing duck
dfd
175 × 120 mm105 parts2LNo license0
Vca
eblade
99.1 × 99.1 mm104 parts2LNo license0
Ripples
blthree
70.1 × 99.1 mm103 parts2LNo license0
ESP32Poket
kaorii-ako
80 × 54 mm100 parts4LMIT0
STM32ANUFS-APPPD
chithigun23
58.9 × 48.4 mm99 parts4LNo license0
Digital tone
barrybridges68
80 × 80 mm96 parts2LGPL-3.00
ESP32Rainbow music pegasus
adamm
151 × 31 mm96 parts2LApache-2.00
ESP32Echowawa
moonbeeper
80 × 40 mm96 parts4LNo license0
RP2040/RP2350Camberwell Parrot
AudioMorphology
117.2 × 110 mm96 parts2LGPL-3.00
Thegrenade 2026
ablanquart
220 × 130 mm96 parts2LCERN-OHL-S-2.00
Nordic nRFMUSIC-PLAYER
Ace6Rings
50 × 50 mm93 parts6LMIT0
Trigger seq panel
elmegil
89.1 × 104.6 mm93 parts2LMIT0
Miniamp
wafaffles
130 × 57 mm92 parts6LNo license0
DIY-amplifier
adamkral20-svg
90.9 × 71.6 mm91 parts4LNo license0
ESP32Stereo Audio Processing Board
Paa-Kwasi-04
103 × 71.9 mm89 parts2LNo license0
STM32Flying Fader
jackr-m
100 × 130 mm89 parts2LNo license0
STM32Mixed signal Board Rev A
Akhilesh-design-02
47.1 × 45.4 mm88 parts4LNo license0
Nordic nRFMSBE V3
Monty103
49.3 × 60.1 mm88 parts4LNo license0
Effect pedal
Ahreo
104.8 × 97.8 mm85 parts2LNo license0
ESP32Synthesizer
0ll0wain
93.7 × 85.7 mm83 parts2LMIT0
ESP32AuraForge-50X
RaviKachhwaha
100 × 80 mm83 parts4LNo license0
Goya1746
escaroda
115 × 70 mm83 parts2LMIT0
RP2040/RP2350ESP-HI-PLUS
dyu134
58 × 35 mm83 parts4LNo license0
Raspberry PiTesseract
hridcode
65 × 100 mm82 parts4LNo license0
RP2040/RP2350Ghost fader
chris-albert
108 × 80 mm82 parts2LNo license0
ESP32Esp32-sensor board
marwantm
99.6 × 55.9 mm80 parts4LNo license0
ES8389-Hat
scrambletools
51.4 × 21.1 mm79 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