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/ArduinoAlpha29 pmw3360
Skycode22
301 × 77 mm14 parts2LNo license132
AVR/ArduinoNO2C-W-STEPPER
turboedge
99.4 × 53.7 mm72 parts2LGPL-2.0107
AVR/ArduinoHB-UNI-SEN-WEA
alexreinert
45.7 × 45.7 mm17 parts2LCC-BY-NC-4.0104
AVR/ArduinoArduino Micro
sabogalc
48.3 × 17.8 mm44 parts4LWTFPL93
AVR/ArduinoPanelizing
thebiguno
41.9 × 20.3 mm33 parts2LNo license75
AVR/ArduinoMalenki nanox
MarkR42
19 × 24.1 mm25 parts2LGPL-3.072
AVR/ArduinoHihat
bread-modular
30.5 × 68.6 mm52 parts2LMIT65
AVR/ArduinoUsb joystick routed
rjwalters
80 × 60 mm38 parts4LMIT63
AVR/ArduinoGrooveboard choc atmel mu
ianklug
118.1 × 22.9 mm24 parts2LCC-BY-SA-4.058
AVR/ArduinoUTILITY TIME MODULE
CodapopKSP
13 × 14 mm53 parts2LGPL-3.037
AVR/ArduinoTransistor matcher
rabidaudio
14 parts2LMIT31
AVR/ArduinoGreaseweazle F1 3.5 Rev 2B
solarmon
170.2 × 100 mm66 parts2LNo license21
AVR/ArduinoBurgerDisk-SMD-Angled
colinleroy
65.1 × 97 mm18 parts2LMIT20
AVR/ArduinoTOOL-Cart
NaokiS28
98 × 85.6 mm9 parts2LNo license16
AVR/ArduinoLPKF Test
AravinthPanch
30.5 × 30.5 mm7 parts2LApache-2.016
AVR/ArduinoFirmware tester board
olin-electric-motorsports
49.9 × 75.4 mm58 parts2LNo license14
AVR/ArduinoMega nRF feedthrough
michaelshiloh
99.3 × 53.6 mm7 parts2LAGPL-3.014
AVR/ArduinoPre current source usb keepout repair v1
mehrantsi
300 × 248.8 mm520 parts6LMIT13
AVR/ArduinoPsu monitor
dragonlock2
67 × 28 mm94 parts2LApache-2.013
AVR/ArduinoTIMPS2KeyMini
Board-Folk
27.5 × 64.6 mm17 parts2LNo license8
AVR/ArduinoAT28C64B-circuit second sol
lorenzonotaro
90 × 78 mm11 parts2LNo license8
AVR/Arduino5to12Boostconverter
hwreverse
29 × 25 mm17 parts2LBSD-3-Clause7
AVR/ArduinoArduino hat
AronAyub
57.1 × 33.9 mm17 parts4LNo license6
AVR/ArduinoSPECIES receiver
ARTS-Laboratory
117.6 × 56.1 mm10 parts2LCC-BY-SA-4.06
AVR/ArduinoArmPowerBoardV3
UofSSpaceTeam
148.3 × 98.6 mm32 parts2LNo license5
AVR/ArduinoMycelium pcb micro
microresearch
74.5 × 83.7 mm28 parts2LGPL-3.05
AVR/ArduinoFilter shield
OE9SAU
101.6 × 53.4 mm27 parts2LNo license4
AVR/ArduinoMySensors Gateway
LudovicLemarinel
64 × 34 mm15 parts2LNo license4
AVR/ArduinoPi HAT V4 Simple
danielwilczak101
78.1 × 71.3 mm8 parts2LNo license4
AVR/ArduinoPypilot tinypilot
pypilot
76.1 × 51.2 mm58 parts4LNo license3
AVR/ArduinoB-Sides 2026
OklahomaOpenSourceHardware
64.6 × 50.8 mm23 parts2LNo license3
AVR/ArduinoDemo board
uvmaero
37.5 × 27.3 mm14 parts2LCC-BY-SA-4.03
AVR/ArduinoDMM Feather Redux
oihdesigns
85.5 × 47.4 mm60 parts4LNo license2
AVR/ArduinoOtit
Elektroniikkakerho
48.8 × 75.1 mm40 parts2LGPL-3.02
AVR/ArduinoGeneric USBAsp
mekatronik-achmadi
47.3 × 25 mm23 parts2LNo license2
AVR/ArduinoTimer
PurkkaKoodari
100 × 100 mm18 parts2LMIT2
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