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/ArduinoDriver 32mm atmega v0p2
floesche
32 × 32 mm17 partsCC-BY-4.01
AVR/ArduinoUSB Timer Prototype
Stevemwa
35.9 × 45.4 mm16 parts2LNo license1
AVR/ArduinoIowa rover kiosk main
scimusmn
76.8 × 79.9 mm13 parts2LNo license1
AVR/ArduinoPami superstar
clubrobot
60 × 60 mm10 parts2LMIT1
AVR/ArduinoATtiny85-Smart Diya
tejashviraj19
57.1 × 57.1 mm9 parts2LNo license1
AVR/ArduinoCrw-005
caitlynrw
15.2 × 10.2 mm4 parts2LNo license1- schematic only · 6 partsAVR/Arduino
Arduino nano
lhondareyte
6 parts2LCC-BY-4.01 
AVR/ArduinoRobust io.before fix4
lusher00
160 × 100 mm259 parts4LCustom license0
AVR/ArduinoHMI
datacrystals
250 × 150 mm158 parts4LNo license0
AVR/ArduinoVCU V3.3
HKUST-Red-Bird-Racing-EVRT
114 × 95 mm145 parts2LNo license0
AVR/ArduinoSystem.refined.routed
MadsRudolph
202.1 × 150 mm131 parts2LNo license0
AVR/ArduinoAsymRightwonky
esouthren
290.2 × 126.1 mm115 parts2LGPL-3.00
AVR/ArduinoTemperature board append
nEDM-TUM
65 × 137 mm97 parts2LNo license0
AVR/ArduinoCorne Light
IndianBoy42
275.5 × 105.6 mm93 parts2LNo license0
AVR/ArduinoVizitka usb Zuza
Meteopresscz
90 × 50 mm77 parts2LNo license0
AVR/ArduinoNO2C.EVO
MIsfitMatty
99.4 × 53.7 mm73 parts2LGPL-2.00
AVR/ArduinoDDS Modul 2
apxco
100 × 84 mm68 parts2LNo license0
AVR/ArduinoEurorack hagiwo euclidean
rhinocerose
90.4 × 127.3 mm67 parts2LNo license0
AVR/ArduinoKeeb rev1-mirror
celcius-plus-273
142.2 × 99.7 mm65 parts2LNo license0
AVR/ArduinoRMK
KarlPeter5039
160 × 127 mm65 parts2LNo license0
AVR/ArduinoMain 3.1
hughminhphan
3.2 × 3.2 mm65 parts2LNo license0
AVR/ArduinoORA Control Board Rev 2.1
gtrupiano
100 × 52.5 mm60 parts2LNo license0
AVR/ArduinoORA Control Board Rev 2.1
oaklandrobotics
100 × 52.5 mm60 parts2LNo license0
AVR/ArduinoPower supply
kuellenberg
180.7 × 180.7 mm48 parts2LNo license0
AVR/ArduinoKeyboard MKI
hsaito18
79 × 102.5 mm48 parts2LNo license0
AVR/ArduinoMain board v1
arkonique
268 × 55.1 mm47 parts2LNo license0
AVR/ArduinoPlane8
greyltc
273 × 30 mm47 parts4LCERN-OHL-1.20
AVR/ArduinoKicad test
maxsterl666
179 × 68.3 mm46 parts4LNo license0
AVR/ArduinoPitotBoard2025
papurika37
27.1 × 42.7 mm46 parts2LNo license0
AVR/ArduinoInstruction registers
ostertag
100 × 60 mm43 parts2LGPL-2.00
AVR/ArduinoPcb-2
rek
147.9 × 86 mm43 parts2LNo license0
AVR/ArduinoXDuinoRail-Protoboard
chatelao
100 × 100 mm42 parts2LAGPL-3.00
AVR/ArduinoDigital clock
Amaza-Ronald
209.2 × 96 mm41 parts2LNo license0
AVR/ArduinoProofOfConceptBoardV1
MST-Robotics
86 × 45.2 mm40 parts2LNo license0
AVR/ArduinoLights-Shild
martinfantini
100.3 × 118.6 mm37 parts2LNo license0
AVR/ArduinoSucsess ehh
ANToNyS21
260 × 190 mm35 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