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/ArduinoUG56-attiny13a pwm controller
universalgeek56
25 × 31.5 mm21 parts2LMIT1
AVR/ArduinoDecorative-PCB-Amaia
CrimsonFire1
100 × 80 mm20 parts2LNo license1
AVR/ArduinoArduino uno pet puller
sh123
75.4 × 53.9 mm20 parts2LGPL-2.01
AVR/ArduinoSyzygy breakout flash-1V8
adamcritchley
44.6 × 90 mm20 parts4LMIT1
AVR/ArduinoEeprom programmer
jkreucher
80 × 80 mm19 parts2LMIT1
AVR/ArduinoHumidifier
priyanshu643
127.8 × 66.8 mm19 parts2LNo license1
AVR/ArduinoHid relay
JPEWdev
45.7 × 30 mm19 parts2LGPL-2.01
AVR/ArduinoRelay
anno73
65.5 × 22 mm19 parts2LNo license1
AVR/ArduinoCreactif electroLAB
Vincent-Stragier
57.6 × 53.9 mm18 parts2LMIT1
AVR/ArduinoAgnosticbox
chihauccisoilconte
83.7 × 74.4 mm18 parts2LNo license1
AVR/ArduinoEx-Chapter07
Sofianopoulou
59.7 × 38.1 mm18 parts2LMIT1
AVR/ArduinoPUFA
sergio-isidoro
37 × 37 mm18 parts2LNo license1
AVR/ArduinoKeystrokeInjectionTool
Tonikiller10000
30.8 × 14.5 mm18 parts2LNo license1
AVR/ArduinoStation-Meteo-ATmega328P
Jordan-eng
66 × 78.7 mm17 parts2LNo license1
AVR/ArduinoMicrocontroller Open Source Hardware
JulienChvt
68.6 × 53.3 mm17 parts2LNo license1
AVR/ArduinoRunning-Tracker-Widget
Ziegen-EE
91.5 × 51.5 mm17 parts2LMIT1
AVR/ArduinoSlice PRTO THT S2L
feastorg
70 × 100 mm17 parts2LGPL-3.01
AVR/ArduinoDebugWireProgrammerSchield
joustava
57.7 × 20.1 mm16 parts2LNo license1
AVR/ArduinoAttiny85-usb hid
69series
33.7 × 12 mm16 parts2LMIT1
AVR/ArduinoRGB Blinky Keychain
rhitvik
50.8 × 49.5 mm16 parts2LMIT1
AVR/ArduinoLEDMusicVisualizer
VinayBhagavath
61.5 × 50.3 mm16 parts2LNo license1
AVR/ArduinoElectrical-Engineering-Portfolio
SyedIhteshamuddin
46.5 × 65 mm16 parts2LNo license1
AVR/ArduinoVoidLens-DIY-VR-Headset-Prototype1
scattercat-123
88.2 × 45.5 mm15 parts2LNo license1
AVR/ArduinoSlider potentiometer breakout qwiic hardware design
SolderedElectronics
86 × 22 mm15 parts2LTAPR-OHL-1.01
AVR/ArduinoSlider potentiometer breakout with easyC-hardware design
86 × 22 mm15 parts2LTAPR-OHL-1.01
AVR/ArduinoManette drone Robotech
Tomnwol
164.2 × 95 mm14 parts2LNo license1
AVR/ArduinoTmv7displaymod
phastmike
70.9 × 33.8 mm14 parts2LNo license1
AVR/ArduinoATtiny85UNOProgrammer
Hengy2016
58.4 × 22.9 mm14 parts2LNo license1
AVR/ArduinoFlipperInfinity
kylecmathias
70 × 100 mm14 parts2LNo license1
AVR/ArduinoPcb business card
namberino
70.5 × 44.7 mm14 parts2LApache-2.01
AVR/ArduinoDiypgs
1r3n33
130 × 78 mm14 parts2LNo license1
AVR/ArduinoHandbrake
StarGate01
31.8 × 36.8 mm12 parts2LGPL-2.01
AVR/ArduinoHall effect sensor easyC
22 × 22 mm12 parts2LTAPR-OHL-1.01
AVR/ArduinoLichtschranke-M-jack
REcassy
40 × 60 mm12 parts2LGPL-3.01
AVR/ArduinoHall effect sensor easyC
22 × 22 mm12 parts2LTAPR-OHL-1.01
AVR/Arduino4-axis arm
vinbot28
49.5 × 45.5 mm12 parts2LMIT1
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