3,813 open source AVR/Arduino boards
ATmega and ATtiny microcontrollers, Arduino-compatible boards and Arduino shields. 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/ArduinoD20
bitshiftcrazy
45.1 × 57.8 mm37 parts2LNo license20
AVR/ArduinoHl alyx glove
StarGate01
85.6 × 41 mm33 parts2LMIT20
AVR/ArduinoSgikbd
jtsiomb
80 × 60 mm27 parts2LGPL-3.020
AVR/ArduinoCelestine
ai03-2725
343.7 × 116.7 mm199 parts2LAGPL-3.019
AVR/ArduinoSolheim68
evyd13
323 × 94.1 mm164 parts2LGPL-3.019
AVR/ArduinoKeyboard
nicola-strappazzon
230 × 96 mm164 parts2LNo license19
AVR/ArduinoBatterymeter
hb020
106.1 × 29.2 mm143 parts4LNo license19
AVR/ArduinoDSKY
Apollo-Replica
169.9 × 190.9 mm116 parts2LCC-BY-NC-4.019
AVR/ArduinoI2S-Hat
raptorlightning
65 × 56 mm94 parts4LGPL-3.019
AVR/ArduinoDaNumPad - Glow 20
TweetyDaBird
100 × 95.3 mm93 parts2LCustom license19
AVR/ArduinoMtg life counter
mprosk
167.6 × 101.6 mm85 parts2LCERN-OHL-S-2.019
AVR/ArduinoBkm-129x simple
skumlos
105 × 89.3 mm55 parts2LWTFPL19
AVR/ArduinoObiwanstenobit
ivndbt
93.8 × 98.5 mm51 parts2LCERN-OHL-S-2.019
AVR/ArduinoDehneEVSE-Hardware
sebdehne
188 × 98 mm46 parts2LGPL-3.019
AVR/ArduinoNixiepipe hardware
tuna-f1sh
48.2 × 49.3 mm45 parts2LCC-BY-SA-4.019
AVR/ArduinoTpms silencer
gcormier
33 × 51.6 mm27 parts2LNo license19
AVR/ArduinoDoMo-Macro-Pad
MayTD
84.9 × 65.1 mm27 parts2LNo license19
AVR/ArduinoMSX SD
yanataka60
79 × 100 mm13 parts2LMIT19
AVR/ArduinoOscillator Board
Bad-Dog-Designs
229 × 96 mm132 parts2LNo license18
AVR/Arduino4-layer panel
bfrigon
99.1 × 91.4 mm90 parts2LCC-BY-SA-4.018
AVR/ArduinoKeebIsSplit
Magnum-Monk
285 × 115.1 mm90 parts2LNo license18
AVR/ArduinoTougherPowerMonitor-HW
ahillbom
130 × 53 mm75 parts2LMIT18
AVR/ArduinoM644/M1284 breakout (Eagle 6.5 exported)
maxxir
54.9 × 45 mm62 partsNo license18
AVR/ArduinoATAPIMega
Manawyrm
100 × 100 mm59 parts4LGPL-3.018
AVR/ArduinoQuantizer
Quinienl
30 × 100 mm38 parts2LNo license18
AVR/ArduinoSparkAltBatteryBoard
fahreddinaykut
58.8 × 29 mm37 parts4LMIT18
AVR/ArduinoKeyman64
hbekel
80 × 64.7 mm29 parts2LGPL-3.018
AVR/ArduinoISOlation
str-dst
27.5 × 40.3 mm20 parts2LNo license18
AVR/ArduinoMicro-ATX
sparkfun
243.8 × 243.8 mm20 parts2LNo license18
AVR/ArduinoArtDecoEarrings
sawaiz
38.9 × 6.6 mm17 parts2LNo license18
AVR/ArduinoKim uno
maxstrauch
68 × 98 mm36 parts2LNo license17
AVR/ArduinoV usb businesscard
AndersBNielsen
85 × 54 mm31 parts2LGPL-3.017
AVR/ArduinoOpenkey cps1-dev
jwestfall69
108.3 × 94.3 mm21 parts2LUnlicense17
AVR/ArduinoBenchBudEE
ContextualElectronics
165.1 × 63.5 mm157 parts2LMIT16
AVR/ArduinoChocolatebar
misonoworks
301.3 × 89.5 mm155 parts2LAGPL-3.016
AVR/ArduinoC-13X
ramonimbao
216.7 × 89.7 mm134 parts2LGPL-3.016
Browse boards by part
AMS1117-3.3 1847USBLC6-2SC6 1502RP2040 1017W25Q128JVS 654AP2112K-3.3 635ESP32-S3-WROOM-1 488TL072 446L7805 43674HC595 404TL074 404CH340C 392LM358 367Pico 356USBLC6-2P6 351AP2112K-3.3TRG1 345Arduino_Nano_v3.x 317LM7805_TO220 315ProMicro 29774LS04 285ESP32-WROOM-32 285PC817 260SRV05-4 25874LS245 257TP4056 250