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/ArduinoI2c moist sensor pannel
Miceuz
100 × 150 mm22 parts2LApache-2.0258
AVR/ArduinoJ2o Board
qbancoffee
82.6 × 52.5 mm16 parts2LLGPL-3.0236
AVR/ArduinoRFBitBanger
profdc9
152 × 88 mm226 parts2LNo license221
AVR/ArduinoBMEKv3
Bemeier
353.8 × 116.1 mm188 partsNo license211
AVR/ArduinoRC6502 Apple 1 SBC
tebl
99.1 × 99.7 mm48 parts2LGPL-3.0192
AVR/Arduino1002 EPROM EMU NG 1.9
Kris-Sekula
99.1 × 88.9 mm39 parts2LApache-2.0161
AVR/ArduinoMiniscope v4-PCB-fab assembly 2
Aharoni-Lab
35.5 × 45 mm62 parts6LGPL-3.0157
AVR/ArduinoDropin
Spaceboards
234 × 68 mm115 parts2LCERN-OHL-W-2.0144
AVR/ArduinoQuantizer
ijnekenamay
30 × 99 mm35 parts2LNo license142
AVR/ArduinoMainboard
ukmars
99.1 × 81.3 mm28 parts2LMIT137
AVR/ArduinoSmall paintbrush hotswap
artseyio
94 × 50 mm17 parts2LNo license135
AVR/ArduinoVGATonic RevB
dqydj
49.6 × 70.2 mm50 parts2LNo license133
AVR/ArduinoAlphabets V2 ATtiny44 millable ring module
TheBeachLab
50 × 50 mm21 parts2LMIT133
AVR/ArduinoMykeyboard
Skycode22
409 × 137 mm178 parts2LNo license132
AVR/ArduinoRHS
dmcke5
26.5 × 26.5 mm31 parts2LCERN-OHL-S-2.0131
AVR/ArduinoQuantizer
QuinnFreedman
50 × 100 mm105 parts2LNo license114
AVR/ArduinoBancouver40 cfx
ChrisChrisLoLo
170 × 69.4 mm98 parts2LGPL-3.0112
AVR/ArduinoOcelot vA3
turboedge
80 × 99.8 mm206 parts2LGPL-2.0107
AVR/ArduinoHB-UNI-644
alexreinert
79 × 78 mm64 parts2LCC-BY-NC-4.0104
AVR/ArduinoPatch shield digital
OpenElectronicsLab
197 × 71 mm77 partsGPL-3.0102
AVR/ArduinoBlueMacro LED Tester
jpconstantineau
40.6 × 48.3 mm57 parts2LBSD-3-Clause100
AVR/ArduinoSpectre
ahtn
223 × 72.2 mm60 parts2LNo license96
AVR/ArduinoArduino UNO R4 Minima
sabogalc
68.6 × 53.3 mm72 parts2LWTFPL93
AVR/ArduinoTG4x4
MythosMann
71.5 × 71.5 mm35 parts2LGPL-3.080
AVR/ArduinoAdjustable Modular Power Supply
thebiguno
36.8 × 52.7 mm183 parts2LNo license75
AVR/ArduinoR3926lp
cyril279
238.7 × 94.9 mm120 parts2LMIT74
AVR/ArduinoZ80ctrl
jblang
99.8 × 49.9 mm30 parts2LMIT73
AVR/ArduinoRs485-moist sensor pannel
5 × 149.5 mm29 parts2LApache-2.073
AVR/ArduinoAnya
jamessa
190.5 × 76.2 mm70 parts2LMIT72
AVR/ArduinoNotMalenki
MarkR42
25 × 40 mm46 parts4LGPL-3.072
AVR/ArduinoRedone-3k v2
kzrtn
57.5 × 52.2 mm31 parts2LNo license72
AVR/ArduinoGh80-1800
evyd13
381 × 148.2 mm272 parts2LCC-BY-SA-4.069
AVR/ArduinoOpenLaserMouseTHT
chris-jh
56 × 84 mm22 parts2LLGPL-3.061
AVR/ArduinoDuPal DIP
DuPAL-PAL-DUmper
113 × 78.7 mm50 parts2LCC-BY-SA-4.057
AVR/ArduinoNt750
347.9 × 123.2 mm199 parts2LCC-BY-SA-4.056
AVR/ArduinoKeyboard
RasmusB
28 × 18 mm27 parts2LNo license56
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