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/ArduinoT41-main board-V012
K0RGI
100 × 100 mm95 parts4LGPL-3.01
AVR/ArduinoLineinterrupter
iduwhux
74.4 × 99.3 mm85 parts2LNo license1
AVR/ArduinoCelaeno
formicidae-tracker
80 × 45 mm69 parts2LNo license1
AVR/ArduinoErgoDoxTW
semicontinuity
200 × 200 mm69 partsNo license1
AVR/ArduinoKeyboard
WilliamLim781
100 × 123.8 mm57 parts2LNo license1
AVR/ArduinoSmartRGB
wyolum
243.8 × 15.2 mm53 partsNo license1
AVR/ArduinoProyecto V2 nico
NicolasSchkurko
82.2 × 83.8 mm44 parts2LNo license1
AVR/ArduinoPCB D
dragondgold
47 × 47 mm39 parts2LGPL-3.01
AVR/ArduinoDoor if
zam-haus
65 × 56.5 mm38 parts2LGPL-3.01
AVR/ArduinoAmur leopard
KingMalur
104.1 × 39.7 mm32 parts2LNo license1
AVR/ArduinoAtmega32 Robot
odobot
75.9 × 67.9 mm28 parts2LNo license1
AVR/ArduinoCPU TESTER
nandgate
161.3 × 101.6 mm27 parts2LMIT1
AVR/ArduinoPsu smart v1.0
lukas-pastva
100 × 24.2 mm26 parts2LApache-2.01
AVR/ArduinoDaqBoard
uvmaero
61 × 41.3 mm25 parts2LNo license1
AVR/ArduinoRF Detector
himanshu40304
68 × 53 mm21 parts4LNo license1
AVR/ArduinoUserInterface
LOEWE-emergenCITY
100 × 100 mm19 parts2LNo license1
AVR/ArduinoKineses Board
sparkerBCI
27.6 × 67.3 mm15 parts2LNo license1
AVR/ArduinoSequencer Back
yry-dev
38.1 × 65.4 mm14 parts2LMIT1
AVR/ArduinoUsbPowerControl v1
ntchris
45.1 × 47 mm13 parts2LGPL-3.01
AVR/ArduinoArduino Mega
axello
36.1 × 53.3 mm13 parts2LNo license1
AVR/ArduinoArduinoDriverSheild
RobertPHeller
68.6 × 53.3 mm11 parts2LGPL-2.01
AVR/ArduinoAdvent candles
pmacik
9.1 × 27.4 mm10 parts2LNo license1- schematic only · 6 partsAVR/Arduino
Atmega32u4
lhondareyte
6 parts2LCC-BY-4.01 
AVR/ArduinoRobust io.before j20silk
lusher00
160 × 100 mm259 parts4LCustom license0
AVR/ArduinoDynamicBrakeGrid
datacrystals
350 × 150 mm151 parts4LNo license0
AVR/ArduinoCharger
HKUST-Red-Bird-Racing-EVRT
100 × 100 mm126 parts2LNo license0
AVR/ArduinoTG4xhotswap
IndianBoy42
244.8 × 72.8 mm93 parts2LNo license0
AVR/ArduinoAsym Keyboard Left Half
esouthren
162.2 × 126.5 mm77 parts2LGPL-3.00
AVR/ArduinoNO2C-W-STEPPER
MIsfitMatty
99.4 × 53.7 mm72 parts2LGPL-2.00
AVR/ArduinoVizitka usb Michal pruhledna
Meteopresscz
90 × 50 mm69 parts2LNo license0
AVR/ArduinoRMK-left
KarlPeter5039
160 × 127 mm65 parts2LNo license0
AVR/ArduinoMain 3.1
eesakiii
206 × 197.4 mm65 parts2LNo license0
AVR/ArduinoPoc
nikital
100 × 100 mm63 parts2LNo license0
AVR/ArduinoORA ControlBoard main Rev2
oaklandrobotics
100 × 52.5 mm60 parts2LNo license0
AVR/ArduinoTriad center
cozykeys
57.2 × 127.7 mm59 parts2LNo license0
AVR/ArduinoPneumatic ctrl
adarwoo
60 × 86 mm58 parts2LNo license0
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