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/Arduino85RF
danchouzhou
31.8 × 55.9 mm19 parts2LNo license0
AVR/ArduinoArduino cnc shield-2.02
HACManchester
50.3 × 51.3 mm19 parts2LNo license0
AVR/ArduinoTinyStep
sebastiangrus
26 × 54 mm19 parts2LNo license0
AVR/Arduino8-led output
pbrowne011
120.3 × 83.8 mm19 parts2LNo license0
AVR/ArduinoDIY Cyclecomputer
jucordero
87.6 × 50.8 mm18 parts2LNo license0
AVR/ArduinoKlask
motty-mio2
69.1 × 53.8 mm18 parts2LCC-BY-SA-4.00
AVR/ArduinoSpritely Bullfrog
jwkunz
50 × 100 mm18 parts2LMIT0
AVR/ArduinoOrnament2025
Chris-Johnston
90.1 × 90.1 mm18 parts2LNo license0
AVR/ArduinoFour cards
BooyahDev
80 × 50 mm18 parts2LUnlicense0
AVR/ArduinoMod emup usb
sharpdad
120 × 80 mm18 parts2LMIT0
AVR/Arduino0bCLK
Jvlse
72.5 × 40 mm18 parts2LNo license0
AVR/ArduinoCat-Gate-Controller v1.0
bgmbzk
68 × 44.6 mm18 parts2LNo license0
AVR/ArduinoPrrplsattiny20
jimktrains
8.2 × 8.2 mm18 parts4LNo license0
AVR/ArduinoTechrom tray
niaid
30 × 70 mm18 parts2LMIT0
AVR/ArduinoControleurFilPiloteSMS
MathieuBahin
87 × 83.6 mm18 parts2LNo license0
AVR/ArduinoBaduino
Lopfi
30 × 17.2 mm18 parts2LMIT0
AVR/Arduino42outer bootcamp elec
Molasz
23.7 × 31.7 mm17 parts2LNo license0
AVR/ArduinoNguy n-Nh t-Khanh-2151097-ESD-E1
nguyennhutkhanhtom
68.6 × 53.3 mm17 parts2LNo license0
AVR/ArduinoArduinoIRstepperController
matt199394
45 × 94 mm17 parts2LNo license0
AVR/ArduinoCE-PiicoDev-Buzzer
CoreElectronics
25.4 × 25.4 mm17 parts2LMIT0
AVR/ArduinoEce411-group10
ajm27pdx
55.9 × 57.8 mm17 parts2LGPL-3.00
AVR/ArduinoCgranja-Pelec
Croco41
37 × 41 mm17 parts2LNo license0
AVR/ArduinoCgranja-Pelec
37 × 41 mm17 parts2LNo license0
AVR/ArduinoChouvet Laffosse Gas Sensor
MOSH-Insa-Toulouse
68.6 × 53.3 mm17 parts2LNo license0
AVR/ArduinoAutomatic-AC-Switch using-PIR-sensor
Manideep136
113.4 × 68.3 mm17 parts2LNo license0
AVR/ArduinoSender r3
p-keminer
165.5 × 125.5 mm17 parts2LMIT0
AVR/ArduinoSpaceInvaderPCBBadge
B1QUAD
110 × 80 mm17 parts2LCC0-1.00
AVR/ArduinoAudioSpectrumLEDGrid
MTRNord
41.9 × 72.4 mm17 parts2LAGPL-3.00
AVR/ArduinoGlassboard
YakshithK
85.6 × 54 mm17 parts2LNo license0
AVR/ArduinoAutomatic door
jessysiman
60.3 × 54.9 mm17 parts2LNo license0
AVR/ArduinoPSX64 Interface THT
Commodore-Bench
92.4 × 32.8 mm17 parts2LCC-BY-NC-4.00
AVR/ArduinoSurvivornode
aneeshlingala
56 × 75 mm16 parts2LNo license0
AVR/ArduinoProject luminescence
vindognz
70 × 70 mm16 parts2LNo license0
AVR/ArduinoProjet ee410
josedsneto
39.8 × 80.7 mm16 parts2LNo license0
AVR/ArduinoArduino ir relay
danshick
55.9 × 69.9 mm16 parts2LNo license0
AVR/ArduinoSnowflake ornament
79 × 86.5 mm16 parts2LMIT0
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