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/ArduinoHardware
DC423
58.4 × 118.1 mm34 parts2LNo license3
AVR/ArduinoFsghrth
frgrw
40 × 54 mm34 parts2LTAPR-OHL-1.03
AVR/ArduinoLockLoop
rmingon
37 × 49 mm34 parts2LCERN-OHL-P-2.03
AVR/ArduinoEmuprom
agkaminski
88.3 × 68.6 mm34 parts2LCC0-1.03
AVR/ArduinoArduino-MIDI-Floppy-Drive-Instrument
jzkmath
101.6 × 53.3 mm33 parts2LGPL-3.03
AVR/ArduinoWizardElectronicGame
hotkeysoft
60 × 125 mm32 parts2LMIT3
AVR/ArduinoKicad nmea2000 sensor
olliiiver
100 × 38 mm32 parts2LMIT3
AVR/ArduinoLED-cube programmable
Binary-Kitchen
50 × 50 mm31 parts2LNo license3
AVR/ArduinoRetroShield1802
tebl
99.7 × 53.3 mm28 parts2LLGPL-2.13
AVR/ArduinoHelp
rqcoon
173 × 57.2 mm27 parts2LMIT3
AVR/ArduinoFlight-Controller
RNA-IITPatna
40 × 100 mm27 parts2LNo license3
AVR/ArduinoMicro mouse v2
prashantbhandary
73 × 68.5 mm26 parts2LNo license3
AVR/ArduinoDataLogger-Board
DevMajed
50.8 × 35.6 mm25 parts4LNo license3
AVR/ArduinoMotorCape
GT-IEEE-Robotics
128.9 × 59.8 mm25 parts2LNo license3
AVR/ArduinoC64UserPortMidi
relic-se
62.5 × 47.5 mm25 parts2LGPL-3.03
AVR/ArduinoMagnetic Coupler V1.1
Ossairy
133 × 106.8 mm25 parts2LNo license3
AVR/ArduinoKombo nrf24 atmega8
MelexinVN
37.6 × 30.7 mm24 parts2LGPL-3.03
AVR/ArduinoMCore Mixtape
8BitMixtape
35.5 × 23.2 mm23 parts2LNo license3
AVR/ArduinoABBlind
UC3Music
99.1 × 53.3 mm23 parts2LNo license3
AVR/ArduinoBullion
coddingtonbear
38.8 × 27.3 mm21 parts2LNo license3
AVR/ArduinoNext micro
siderakb
17.8 × 33 mm21 parts2LMIT3
AVR/ArduinoWaterTankMonitor
ncolomer
35.4 × 39.4 mm19 parts2LUnlicense3
AVR/ArduinoTheroof
a-wai
60 × 53.6 mm18 parts2LCERN-OHL-1.23
AVR/Arduino3ch pwm sao badge
9a
28 × 15.8 mm18 parts2LNo license3
AVR/ArduinoSB Pixel Count
computergeek1507
53.5 × 26.5 mm18 parts2LNo license3
AVR/ArduinoArduino as-ISP-shield
atoomnetmarc
57.2 × 53.3 mm17 parts2LApache-2.03
AVR/ArduinoHigher lower
oskitone
63.5 × 38.1 mm14 parts2LCC-BY-SA-4.03
AVR/ArduinoAtmega328PB minimal board
jovan3
54 × 33.7 mm13 parts2LNo license3
AVR/ArduinoBlink Eras
kbob
27.9 × 20.3 mm12 parts2LCC-BY-4.03
AVR/ArduinoBSED
RCMgames
21.6 × 25.4 mm11 parts2LMIT3
AVR/ArduinoFan controller athena power
mike42
70 × 26.8 mm8 parts2LGPL-2.03
AVR/ArduinoWanptek encoder
igorzab-stud
56 × 51 mm7 parts4LMIT3- schematic only · 332 partsAVR/Arduino
Skayboard
Skaytacium
332 partsMIT3 - schematic only · 16 partsAVR/Arduino
MCP
unmateria
16 partsCustom license3 - schematic only · 8 partsAVR/Arduino
ArduinoClass
Mark-MDO47
8 partsGPL-3.03 - schematic only · 6 partsAVR/Arduino
Monopoly rfid
aluisioalves123
6 partsMIT3
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