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.
- schematic only · 12 partsAVR/Arduino
Arduino-Kettle-Temperature-Controller
Bubbles-sz
12 partsNo license1 - schematic only · 9 partsAVR/Arduino
Robomagotchi Arduino Project
Adrifot
9 partsMIT1 - schematic only · 8 partsAVR/Arduino
FOSSDAQ
prfpeste
8 partsNo license1 - schematic only · 7 partsAVR/Arduino
EIDEv3
mobiluckvn
7 partsNo license1 - schematic only · 7 partsAVR/Arduino
KeyLED
wivy1
7 partsCC-BY-NC-4.01 - schematic only · 5 partsAVR/Arduino
PCB-Auditor-Knight-Divers
NamanPahariya2009
5 partsMIT1 - schematic only · 5 partsAVR/Arduino
Pixy
Broosky
5 partsNo license1 - schematic only · 4 partsAVR/Arduino
Cpc paddle
issalig
4 partsNo license1 
AVR/ArduinoCounter sema lens30cm
AbdELRahmanGamiel
275 × 275 mm585 parts2LNo license0
AVR/ArduinoHauptplatine
JoshCrouch
220 × 160.5 mm504 parts4LNo license0
AVR/Arduino8bit
Haxintosh
214.7 × 238.3 mm468 parts2LCERN-OHL-P-2.00
AVR/ArduinoLo-Key
chgray
358.3 × 123.4 mm401 parts2LNo license0
AVR/Arduino8bit computer
saktheeswaranswan
297.2 × 180.3 mm327 parts2LMIT0
AVR/ArduinoMEP MAXI 85V-1 REV 2 Interface Board
JGilcreast
221.5 × 130.8 mm323 parts4LNo license0
AVR/ArduinoBDCMotorController
nunosousa
203.5 × 90 mm313 parts4LMIT0
AVR/ArduinoRetro-002
githubgilhad
100 × 100 mm295 parts4LGPL-3.00
AVR/ArduinoHigh amp controller board
PubInv
205 × 190 mm291 parts2LAGPL-3.00
AVR/ArduinoAvswitch
mmcmaster-au
208 × 116 mm286 parts4LGPL-3.00
AVR/ArduinoRobust io.before align
lusher00
160 × 100 mm259 parts4LCustom license0
AVR/ArduinoGroED
BB-KING777
98.1 × 98.1 mm257 parts2LNo license0
AVR/ArduinoDiu
0x007E
143.5 × 68.6 mm253 parts2LCC-BY-NC-4.00
AVR/ArduinoP65
arij
299.6 × 101.3 mm248 parts2LCC-BY-SA-4.00
AVR/ArduinoTitan67j60
Lehman3065
191 × 123 mm242 parts2LNo license0
AVR/ArduinoInverterBoostConverter
datacrystals
450 × 150 mm225 parts2LNo license0
AVR/ArduinoAmplifierBoard
dangrie158
210 × 104 mm225 parts2LMIT0
AVR/ArduinoBipolar led matrix
arkonique
156.4 × 80 mm224 parts2LNo license0
AVR/ArduinoProyekKedaireka SHMS Bridge
farisalimmirzani365
100 × 100 mm221 parts2LNo license0
AVR/ArduinoPID Board
AaronDoubert
250 × 100 mm218 parts2LNo license0
AVR/ArduinoGalatea Old Type 6u
Clein-KR
344.5 × 123.3 mm218 parts2LCC-BY-NC-4.00
AVR/ArduinoController-Electrical-Schematics
mk4-dd
181.7 × 127.5 mm216 parts4LNo license0
AVR/ArduinoUA4C-vC5
MIsfitMatty
100 × 99.8 mm213 parts2LGPL-2.00
AVR/ArduinoMechanical keyboard mac
Avaviel
408.5 × 95 mm210 parts2LNo license0
AVR/ArduinoMysterium
eliaskountouris
347.7 × 146.6 mm206 parts2LNo license0
AVR/ArduinoThermocouple 8ch
mahmoud-elghamry
250 × 140 mm201 parts2LNo license0
AVR/ArduinoTruss
practable
114.3 × 102.9 mm198 parts2LAGPL-3.00
AVR/ArduinoChessconnect
K-0hm
396.3 × 336.1 mm196 parts2LGPL-3.00
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