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/ArduinoFront dash unit
HKUST-Red-Bird-Racing-EVRT
101 × 63.3 mm90 parts2LNo license0
AVR/ArduinoCrkbd
IndianBoy42
133.8 × 92.2 mm86 parts2LNo license0
AVR/ArduinoTestbench
rcapaverde
274.3 × 124.5 mm68 parts2LNo license0
AVR/ArduinoVizitka usb ZuzaX
Meteopresscz
90 × 50 mm68 parts2LNo license0
AVR/ArduinoPattern sequencer
gridbugs
76 × 150.1 mm65 parts2LMIT0
AVR/ArduinoConsole left
adarwoo
55 × 84.5 mm55 parts2LNo license0
AVR/ArduinoEsclave OYA AT328
bpmine
77.6 × 30 mm49 parts2LNo license0
AVR/ArduinoEmbedduino
MAHESH-THILAK-K
67.5 × 82.7 mm46 parts2LApache-2.00
AVR/ArduinoControl and communication card
pozsarzs
160 × 100.3 mm45 parts2LEUPL-1.20
AVR/ArduinoButtonInterfaceBoard 0-2
Govish
36.8 × 47 mm36 parts2LMIT0
AVR/ArduinoTailBoard2025
papurika37
63 × 36.5 mm36 parts2LNo license0
AVR/ArduinoLoRa based pump reciever circuit
Amaza-Ronald
59.3 × 76.5 mm32 parts2LNo license0
AVR/ArduinoCarrier board arduino current driver
gkeiel
61.6 × 49.8 mm29 parts2LMIT0
AVR/ArduinoPokus o lepsi usporadani
ANToNyS21
245 × 153.3 mm28 parts2LNo license0
AVR/ArduinoGimble Goblin
MST-Robotics
44.5 × 36.6 mm28 parts2LNo license0
AVR/ArduinoProto ps2-gen2
MicroLind-Developers
49.5 × 76.2 mm27 parts2LCERN-OHL-P-2.00
AVR/ArduinoValhalla-MOD-CPU ATMEGA
csdexter
76.2 × 50.8 mm27 parts2LGPL-3.00
AVR/ArduinoP3
larsimmisch
86.4 × 45.7 mm26 parts2LNo license0
AVR/ArduinoStepper Motor
danielwilczak101
60 × 47.8 mm23 parts2LNo license0
AVR/ArduinoIv pulse motherboard
Brunner-neutrino-lab
140 × 140 mm18 parts2LNo license0
AVR/ArduinoTunnel-IR-barrier
atuleu
10 × 50 mm17 parts2LCERN-OHL-S-2.00
AVR/ArduinoBase 2layer stitched
Hemlock-white
100 × 98.9 mm16 parts2LNo license0
AVR/ArduinoUsb bracelet
NB6RULES
204 × 26.5 mm14 parts2LNo license0
AVR/ArduinoIOExpander-Mega-Schild
martinfantini
114.3 × 96.5 mm14 parts2LNo license0
AVR/ArduinoMotor redo
maxsterl666
156 × 78.5 mm13 parts2LNo license0
AVR/ArduinoMotorFaderBoard
8-Lambda-8
42 × 100 mm13 parts2LGPL-3.00
AVR/ArduinoM MUC
Kenkneeshio
43.2 × 38.1 mm11 parts2LNo license0
AVR/ArduinoMCU BREAKOUT
neatstranger
53.3 × 43.2 mm8 parts4LNo license0
AVR/ArduinoTraffic
George-Emad31
54.6 × 13 mm8 parts2LNo license0
AVR/ArduinoTracker shield
bendelathouwer
68.6 × 53.3 mm8 parts2LNo license0
AVR/ArduinoIR-endstop-04
sl1pkn07
20.5 × 8 mm8 parts2LNo license0
AVR/ArduinoLine Follower Robot 1782236633074
chestnutensign45875
200 × 130 mm5 parts2LNo license0
AVR/ArduinoStrip dimmer
dennisss
41 × 20 mm11 parts2LApache-2.0381
AVR/ArduinoMiniscope v4-MCU
Aharoni-Lab
7.5 × 8 mm12 parts6LGPL-3.0157
AVR/ArduinoMegaProgrammer
clydeshaffer
89 × 93 mm32 parts4LNo license146
AVR/ArduinoKICK
ijnekenamay
30 × 100 mm27 parts2LNo license142
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