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/ArduinoSand-Plotter
tim-callinan
68.6 × 53.3 mm15 parts2LNo license2
AVR/ArduinoHeatsink
Supermagnum
111 × 61 mm15 parts2LNo license2
AVR/ArduinoRed sprite water monitor
kgolding
90.4 × 66.4 mm15 parts2LNo license2
AVR/ArduinoQC-Hack reDesign
Fab-Lab-Island
26.1 × 31.4 mm15 parts2LNo license2
AVR/ArduinoPcb Project
ODARI-CHARLES1
75.1 × 50.1 mm14 parts2LNo license2
AVR/ArduinoFade
konspyre
34.7 × 16.8 mm14 partsCustom license2
AVR/ArduinoSmoothBus-T2A
theHeathLee
31 × 31.8 mm14 parts2LNo license2
AVR/ArduinoHALLOWEEN-JACK-O-LANTERN-V2
AchimPieters
46.5 × 22.5 mm14 parts2LMIT2
AVR/ArduinoECE-411-Capstone-Practicum
GaryLazerFinz
47 × 20.3 mm13 parts2LNo license2
AVR/ArduinoMega nrf24 usb
douglaslyon
14.2 × 36 mm12 partsGPL-3.02
AVR/ArduinoAtmega32u4-minimal
marcbperez
43.2 × 33 mm12 parts2LApache-2.02
AVR/ArduinoWeather station
z0b1
37.3 × 36.5 mm11 parts4LNo license2
AVR/ArduinoPCB-Domestic-Vibration---Motion-Sensor
MbFredys
30.6 × 47 mm10 parts2LMIT2
AVR/ArduinoPro micro adb shield
cnorthway
18 × 43.5 mm9 parts2LBSD-2-Clause2- schematic only · 28 partsAVR/Arduino
7Driver
Broosky
28 partsNo license2 - schematic only · 27 partsAVR/Arduino
GE-Opal-Reverse-Engineering-Project
SomeAspy
27 partsGPL-3.02 - schematic only · 15 partsAVR/Arduino
Bcm3000
aschet
15 parts2LMIT2 - schematic only · 14 partsAVR/Arduino
Triggy
14 partsNo license2 - schematic only · 13 partsAVR/Arduino
Rus slam
danilka-revin
13 partsNo license2 - schematic only · 11 partsAVR/Arduino
VArm6
VJPatz
11 partsMIT2 
AVR/ArduinoMechanical keyboard v1
Ralle001
432 × 130.9 mm456 parts4LNo license1
AVR/ArduinoMacPad-Keyboard
ImNoahDev
500 × 137.8 mm350 parts2LCC-BY-NC-4.01
AVR/ArduinoMotorteiber002
Toberfra
200.7 × 279.4 mm303 parts2LGPL-3.01
AVR/ArduinoViper
isol33t
285 × 95.1 mm290 parts2LMIT1
AVR/ArduinoButterflynet
unit117
30 × 430 mm270 parts4LMIT1
AVR/ArduinoKeeBoard
scattercat-123
351.9 × 99.3 mm267 parts2LNo license1
AVR/ArduinoMso5k la-16ch
flesniak
90 × 46.2 mm232 parts4LNo license1
AVR/ArduinoMithril panneled
sanfeps
132.8 × 138.8 mm216 parts4LNo license1
AVR/ArduinoPlc-4u a
semicontinuity
64 × 84 mm215 parts2LNo license1
AVR/ArduinoSparkdog-PF-DI-V3
RabbitECUProject
104.1 × 98.9 mm212 parts4LBSD-2-Clause1
AVR/ArduinoCL70
Clein-KR
343.8 × 98.1 mm211 parts2LCC-BY-NC-4.01
AVR/ArduinoStepper driver
harp-tech
124.4 × 80.4 mm207 parts4LCustom license1
AVR/ArduinoDropbot-40-channel-HV-switching board.
sci-bots
84 × 92 mm204 partsCustom license1
AVR/ArduinoECU STM V1
mstevanin4
93 × 108 mm201 parts4LNo license1
AVR/ArduinoKeyboard usbC with lighting
Neil-de-grass-eating-Bisson
381 × 101.5 mm194 parts2LNo license1
AVR/ArduinoHighway-Keyboard
SomeonetookVeracles
364.6 × 139.2 mm193 parts2LApache-2.01
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