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/ArduinoNamecard
saoto28
91 × 55 mm6 parts2LGPL-2.0303
AVR/Arduino0.4
speeduino
100 × 100 mm142 parts2LNo license281
AVR/ArduinoRFBitBangerNano
profdc9
152 × 88 mm209 parts2LNo license221
AVR/ArduinoTreadstone32
marksard
198.8 × 75.8 mm79 parts2LMIT192
AVR/ArduinoRC6502 Terminal
tebl
99.1 × 81.9 mm45 parts2LGPL-3.0192
AVR/ArduinoEPC Breakout
gregdavill
45 × 70 mm97 parts4LNo license178
AVR/Arduino1002 EPROM EMU NG 1.8
Kris-Sekula
99.1 × 88.9 mm38 parts2LApache-2.0161
AVR/ArduinoMiniscope v4-PCB-fab assembly
Aharoni-Lab
36 × 18.5 mm41 parts6LGPL-3.0157
AVR/ArduinoWideZlant
Spaceboards
281 × 76.2 mm114 parts2LCERN-OHL-W-2.0144
AVR/ArduinoProgrammableRelayModule4Channel
numato
91 × 82 mm72 parts2LNo license143
AVR/ArduinoMultiClockDiv
ijnekenamay
30 × 105 mm32 parts2LNo license142
AVR/ArduinoOOTstag rev2
Skycode22
409 × 137 mm170 parts2LNo license132
AVR/ArduinoBE6502 Mega Adapter
99.1 × 99.1 mm20 parts2LCERN-OHL-1.2128
AVR/ArduinoEnvelope
QuinnFreedman
38 × 100 mm60 parts2LNo license114
AVR/ArduinoKowgary16 cfx
ChrisChrisLoLo
68 × 69.4 mm51 parts2LGPL-3.0112
AVR/ArduinoUnderdog
turboedge
100 × 99.8 mm202 parts2LGPL-2.0107
AVR/ArduinoPatch shield analog
OpenElectronicsLab
197 × 71 mm39 partsGPL-3.0102
AVR/ArduinoGhost
ahtn
185 × 52 mm38 parts2LNo license96
AVR/ArduinoArduino Mega 2560
sabogalc
101.6 × 53.3 mm60 parts2LWTFPL93
AVR/ArduinoBuzzer
plusvic
45 × 39 mm3 parts2LCC0-1.093
AVR/ArduinoMalenki-HV
MarkR42
19 × 32 mm42 parts4LGPL-3.072
AVR/ArduinoUnnamed-3k v2
kzrtn
59.3 × 63 mm25 parts2LNo license72
AVR/ArduinoGh80-3700
evyd13
91.9 × 149.1 mm84 parts2LCC-BY-SA-4.069
AVR/Arduino0xCB 1337
0xCB-dev
62 × 62 mm53 parts2LCustom license60
AVR/ArduinoProgshield
ALXCO-Hardware
121.9 × 81.3 mm14 parts2LCC-BY-4.058
AVR/ArduinoNt660
312 × 96.1 mm159 parts2LCC-BY-SA-4.056
AVR/ArduinoBemini atmel mu
ianklug
200 × 65 mm43 parts2LCC-BY-SA-4.055
AVR/ArduinoSirDuke
vul-os
42.4 × 14.1 mm20 parts2LApache-2.055
AVR/ArduinoLittle Big Scroll 4
TweetyDaBird
83.6 × 40 mm19 parts2LCC-BY-SA-4.055
AVR/ArduinoNfc sense ntag BME
unsurv
18.6 × 34.5 mm18 parts4LNo license49
AVR/ArduinoSpectrogram right
keebio
159.5 × 99.4 mm91 parts2LMIT45
AVR/ArduinoACTION MODULE
CodapopKSP
13 × 14 mm88 parts2LGPL-3.037
AVR/Arduino3xVCA
odeliy
28 × 110 mm85 parts2LNo license37
AVR/ArduinoAfterglow WHITESTAR 2.1
bitfieldlabs
81 × 181.5 mm118 parts2LNo license32
AVR/ArduinoIo
jtsiomb
142 × 100 mm42 parts2LCC-BY-SA-4.032
AVR/ArduinoSWD2USBC
alvarop
25.8 × 16 mm16 parts4LCC0-1.029
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