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/ArduinoUA AIAA Payload 2026
buttonbugs
60 × 60 mm12 parts2LNo license0
AVR/ArduinoRotaryDial2Serial
Qeteshpony
25 × 20 mm12 parts2LBSD-2-Clause0
AVR/ArduinoD1R32InterfaceShield
mpek29
68.6 × 53.3 mm12 parts2LNo license0
AVR/ArduinoChessRobotArm
BujoreanuVlad
40.3 × 82.5 mm12 parts2LNo license0
AVR/ArduinoMP3-Player
Mithra806
98.5 × 102.5 mm12 parts2LMIT0
AVR/ArduinoSpark-Night-Light
hollowmaster1496
45 × 40 mm12 parts2LNo license0
AVR/ArduinoPCBCard
kwame-y
89 × 51 mm12 parts2LMIT0
AVR/ArduinoBumWatch
choicebuilds
44 × 44 mm12 parts4LNo license0
AVR/ArduinoCE-PiicoDev-Potentiometer
CoreElectronics
25.4 × 25.4 mm12 parts2LMIT0
AVR/ArduinoHelioHydration
jaydenaleung
50 × 50 mm12 parts2LNo license0
AVR/ArduinoCE-PiicoDev-Ultrasonic-Rangefinder
25.4 × 25.4 mm12 parts2LMIT0
AVR/ArduinoDeeJ-Audio-Controller
McNik1997
73 × 100 mm12 parts2LNo license0
AVR/ArduinoRgb tube
cookiemonsternz
12.3 × 150 mm11 parts2LNo license0
AVR/ArduinoBitclock
dimka-rs
61 × 61 mm11 parts2LGPL-3.00
AVR/ArduinoAir quality sensors
ma-rapp
55 × 46 mm11 parts2LMIT0
AVR/ArduinoCuttlefish
Ezhkin-Kot
87.5 × 63 mm11 parts2LNo license0
AVR/ArduinoTurbimeter Citizen science
alexmanuel27
54.7 × 39.7 mm11 parts2LNo license0
AVR/ArduinoRcc
0x007E
25.4 × 25.4 mm11 parts2LCC-BY-NC-4.00
AVR/ArduinoFancyDMM
NikhilMotagi
30 × 30 mm11 parts2LNo license0
AVR/ArduinoArduinoLightsaber
BamdadKh
25 × 100 mm11 parts2LMIT0
AVR/ArduinoAudio shield
deniskokarev
52.1 × 54.6 mm11 parts2LNo license0
AVR/Arduino6-channel nrf24l01-transmitter
Aritra607
124.3 × 39.5 mm11 parts2LNo license0
AVR/ArduinoFridge owl
HeyPCB
42 × 53.2 mm10 parts2LCERN-OHL-S-2.00
AVR/ArduinoWord clock
fablab-imperia
59.7 × 87.4 mm10 parts2LGPL-3.00
AVR/ArduinoSvi728keyboardreset
arttu76
48 × 42 mm10 parts2LNo license0
AVR/ArduinoPhenakistiscope
jfraire
35.6 × 26.7 mm10 parts2LCC0-1.00
AVR/ArduinoCurrent Meter
LuizFernandoOliveira
23.5 × 50.8 mm10 parts2LNo license0
AVR/ArduinoDualBoard
JannesWendelken
73.5 × 30 mm10 parts2LNo license0
AVR/ArduinoAlteFabrik191126
25mmHg
27.9 × 15.2 mm10 parts2LBSD-3-Clause0
AVR/ArduinoArduino gameboy
fredriknk
100 × 100 mm10 parts2LMIT0
AVR/ArduinoServo tester
ironiron
39.6 × 23.9 mm10 parts2LUnlicense0
AVR/ArduinoHallowBadges-Bat
makeristic
98.5 × 89.1 mm10 parts2LNo license0
AVR/ArduinoHallowBadges-Ghost
88.1 × 99.1 mm10 parts2LNo license0
AVR/ArduinoHallowBadges-Pumpkin
99.6 × 94.1 mm10 parts2LNo license0
AVR/ArduinoKicad spo2-board
andreimatei03
80 × 50 mm10 parts4LNo license0
AVR/ArduinoMultisheet Schematic
Naman-Bothra
120 × 99 mm10 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