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/ArduinoSAP-Plus Loader / Debugger
TomNisbet
102 × 96 mm18 parts2LMIT10
AVR/ArduinoZulassungskarte
stonedDiscord
88.8 × 45.5 mm13 parts2LBSD-2-Clause4
AVR/ArduinoIN16 optoToMySensors
LudovicLemarinel
50 × 50 mm11 partsNo license4
AVR/ArduinoWeather minimal
pypilot
25.4 × 36.4 mm26 parts2LNo license3
AVR/ArduinoProgrammer
bask185
25 × 55 mm25 parts2LNo license3
AVR/ArduinoMIDI to CV
PancakeLegend
30 × 100 mm18 parts2LGPL-3.02
AVR/ArduinoH4n2rs485
mwwhited
38.1 × 44.5 mm17 parts2LMIT1
AVR/ArduinoRobust io.before footprint update
lusher00
159.1 × 101.4 mm254 parts4LCustom license0
AVR/ArduinoPulsegen
adarwoo
160 × 61 mm34 parts2LNo license0
AVR/Arduino600 to 12V dc
HKUST-Red-Bird-Racing-EVRT
66.8 × 60 mm26 parts2LNo license0
AVR/ArduinoStm32F103Board
danielvilas
104 × 77 mm26 parts2LMIT0
AVR/ArduinoXDuinoRail-Backplane-Arduino
chatelao
100 × 50 mm12 parts2LAGPL-3.00
AVR/ArduinoLivestock monitor
Amaza-Ronald
32 × 24 mm12 parts2LNo license0
AVR/ArduinoATtiny
Tert2
86 × 77 mm11 parts2LNo license0
AVR/ArduinoSSMezBoard
paulbuzzby
30 × 60 mm9 parts2LNo license0
AVR/ArduinoLamp remote mcu
ArgonautGit
29 × 19 mm9 parts2LNo license0
AVR/ArduinoArduino nano breakout board
baleshwarece-jpg
45 × 80 mm8 parts2LNo license0
AVR/ArduinoIDM-RoomSensor-Classic
Xerolux
38 × 28 mm6 parts2LCERN-OHL-S-2.00
AVR/ArduinoControl Panel Mega Shield bak 2
Enthusela
104.1 × 55.9 mm6 parts2LNo license0
AVR/ArduinoDual Atto320 breakout
gregdavill
45 × 70 mm8 parts4LNo license178
AVR/ArduinoEurorack Dual Envelope Module
Len42
40.3 × 108.2 mm57 parts2LNo license50
AVR/ArduinoRC1 Keypad to USB
tebl
72.4 × 45.1 mm8 parts2LCERN-OHL-1.225
AVR/ArduinoDron
zuiko21
84.2 × 84.2 mm7 parts2LMIT23
AVR/ArduinoShield kb1
tangybbq
65.5 × 53 mm18 parts2LNo license21
AVR/ArduinoNQSAP Output Display
102 × 96 mm18 parts2LMIT18
AVR/ArduinoEeprom burner
Velko
68.6 × 53.3 mm22 parts2LMIT16
AVR/ArduinoServoFrogSwitches
55.5 × 48.5 mm21 parts2LNo license3
AVR/ArduinoUseless box
ENACRobotique
43 × 31 mm8 parts2LNo license2
AVR/ArduinoSlider
lucanastasio
44 × 39 mm35 parts2LNo license1
AVR/ArduinoRobust io.before spi reroute
159.1 × 101.4 mm254 parts4LCustom license0
AVR/ArduinoBoardArduinos
95 × 53 mm14 parts2LMIT0
AVR/ArduinoPynq rpi ph adapter
mtguerreiro
167.8 × 102.7 mm9 parts2LBSD-3-Clause0
AVR/ArduinoArduino board
kapibaratomo
93.5 × 69 mm6 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