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/ArduinoRoomba wall v3
Petezah
27.9 × 30 mm13 parts2LGPL-3.04
AVR/ArduinoCrobagotchi
Chris-Johnston
33 × 55.9 mm10 parts2LMIT4
AVR/ArduinoKicon19-blinky
ShawnHymel
25.4 × 63.5 mm9 parts2LNo license4
AVR/ArduinoRe5-macropad
e3w2q
95.3 × 57.2 mm7 parts2LMIT4- schematic only · 267 partsAVR/Arduino
Aek
MythosMann
267 partsGPL-3.04 - schematic only · 41 partsAVR/Arduino
FumeBot
ajithcodesit
41 partsMIT4 - schematic only · 15 partsAVR/Arduino
DC34 Main Badge Fuzzer SAO
NilbinSec
15 partsNo license4 
AVR/ArduinoClockFOUR
wyolum
210 × 228 mm431 parts2LMIT3
AVR/ArduinoAZTEC Motherboard
awarsewa
168 × 150 mm307 parts2LGPL-3.03
AVR/ArduinoSentry keyboard
markstory
315 × 121 mm265 parts2LMIT3
AVR/ArduinoExp control board
Coen-Lab
120.2 × 224.7 mm262 parts4LAGPL-3.03
AVR/ArduinoCW-CONTROLLER
prusa3d
126 × 57 mm247 parts4LNo license3
AVR/ArduinoMod12003
semianalog
90 × 90 mm230 parts2LCC0-1.03
AVR/ArduinoNixiedisp
jtsiomb
140 × 76.1 mm224 parts2LGPL-3.03
AVR/ArduinoSkeleton68
skeletonkbd
336.6 × 121.7 mm224 parts2LMIT3
AVR/ArduinoCan ortholinear keyboard
canaknesil
285.8 × 114.4 mm173 parts2LGPL-3.03
AVR/ArduinoHighpower controller
pypilot
116 × 86.4 mm168 parts4LNo license3
AVR/ArduinoDK60
Dbroqua
285.1 × 94.3 mm154 parts2LGPL-3.03
AVR/ArduinoMSWI19
ZeniteSolar
140 × 72.1 mm147 parts2LGPL-3.03
AVR/ArduinoBattry-Management-System
src94
156.7 × 80.6 mm143 parts2LGPL-3.03
AVR/ArduinoV0.4.4b
PyroMix62
100 × 100 mm138 parts2LNo license3
AVR/ArduinoRgb switcher
michaelobed
360 × 200 mm129 parts4LMIT3
AVR/ArduinoUNO-TH Rev3e
humancomputerintegration
84.5 × 66.5 mm118 parts2LGPL-3.03
AVR/ArduinoPcb business card
AG2048
85.6 × 54 mm116 parts2LCERN-OHL-S-2.03
AVR/ArduinoHandheld
erikvanzijst
240 × 77.7 mm113 partsMIT3
AVR/ArduinoMainBoard BrooksGen5XMini
tristanmelton
259.5 × 133 mm108 parts2LMIT3
AVR/ArduinoCorboIron
bjohan
78.7 × 99.1 mm101 parts2LNo license3
AVR/ArduinoBMS
hosier
88.9 × 33 mm100 parts2LMIT3
AVR/ArduinoTOBS
soldesign
87 × 87 mm100 parts2LGPL-3.03
AVR/ArduinoBeatervan
ojthetiny
242.9 × 96.8 mm99 parts2LNo license3
AVR/ArduinoMonitoring board
AUV-IITK
397.3 × 217.9 mm97 parts2LNo license3
AVR/ArduinoMls800
blemasle
293.4 × 80.5 mm92 parts2LGPL-3.03
AVR/ArduinoLr hudiy rpi hat
sedlons
87.4 × 56 mm90 parts2LNo license3
AVR/ArduinoSCOUT2
oskitone
221.4 × 52.3 mm88 parts2LNo license3
AVR/ArduinoRelayTrackerController
bask185
54 × 94.5 mm86 parts2LNo license3
AVR/ArduinoHB-UNI-TEST-PROG-BOARD V2.2
chianti2000
200.8 × 100.3 mm86 parts2LNo license3
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