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/ArduinoReverseCEWB
aJax-EXE
76.8 × 60.8 mm10 parts2LGPL-3.00
AVR/ArduinoTaller de control-Brischetto-Cavicchioli
Icavicchioli
44.8 × 55 mm10 parts2LNo license0
AVR/ArduinoMeniscus controller
EdSmithe
76 × 91 mm10 parts2LNo license0
AVR/ArduinoTinyfan
neoden
26.5 × 18 mm10 parts2LNo license0
AVR/ArduinoSmart Heart Rate Monitor
aleksanry
85.4 × 48.4 mm10 parts4LNo license0
AVR/ArduinoElectroWEAR
Vijeta-Garg
115.5 × 79 mm10 parts2LNo license0
AVR/Arduino14segment score counter
RaZerTeC
80 × 70 mm10 parts2LGPL-3.00
AVR/ArduinoPcb journey
hardikrawat910-byte
82 × 49 mm10 parts2LNo license0
AVR/ArduinoDigistump ATtiny
Hasona57
37.8 × 12 mm10 parts2LNo license0
AVR/ArduinoAttiny oil lamp
ktauchathuranga
60 × 60 mm9 parts2LNo license0
AVR/ArduinoBreadboard-Business-Card
couchpotatoe1234
90 × 50 mm9 parts2LNo license0
AVR/ArduinoTech diya
ankurlearner1
61 × 61 mm9 parts2LMIT0
AVR/ArduinoPromini cc1101
13
17.8 × 60 mm9 parts2LNo license0
AVR/ArduinoConveyor project
jackstevens44
63 × 54.5 mm9 parts4LNo license0
AVR/ArduinoStandalone ATmega382
justfulofluck
33 × 58.4 mm9 parts2LNo license0
AVR/ArduinoPocketLight
yansha2903-bot
50.1 × 35.2 mm9 parts2LMIT0
AVR/ArduinoBoard eng
egoraura
53.3 × 68.6 mm9 parts2LNo license0
AVR/ArduinoVery-Simple-TZXDuino
r0b0t1cu
99.1 × 31.8 mm9 parts2LMIT0
AVR/ArduinoSmart parking-System
ahmed-salama7
128.5 × 112 mm8 parts2LNo license0
AVR/ArduinoRc car transmitter
rudranshgoel1
62.4 × 71.4 mm8 parts2LNo license0
AVR/ArduinoDryer Buzzer V3
97Cweb
47.7 × 50.8 mm8 parts2LNo license0
AVR/ArduinoAutostop killer
kubiq
33 × 34 mm8 parts2LMIT0
AVR/ArduinoAttendance-Reader
meerfahim
123.2 × 90.2 mm8 parts2LNo license0
AVR/ArduinoToilet monitoring system
alepnabil
81.5 × 128.8 mm8 parts2LNo license0
AVR/ArduinoNFC message switcher
Iceteavanill
85.6 × 54 mm8 parts2LNo license0
AVR/ArduinoReceiver
navneet-krishna
100 × 90 mm7 parts2LNo license0
AVR/ArduinoServer case fan regulator
benoit-lacroix
44.5 × 30.5 mm7 parts2LGPL-3.00
AVR/ArduinoLayout
harry123180
177.8 × 101.6 mm7 parts4LNo license0
AVR/ArduinoSaintcon-2026-minibadge
ZeroStack-Labs
25.4 × 25.4 mm7 parts2LMIT0
AVR/ArduinoMicrocontroller-Breakout-Board
Sia3136
59.5 × 44.5 mm7 parts2LNo license0
AVR/ArduinoFifa-World-Cup-Romance-Test
fanglin0
40 × 37.5 mm6 parts2LNo license0
AVR/ArduinoCapillary-Tube-Valve-Switch
cegly2444
65 × 95 mm6 parts2LNo license0
AVR/ArduinoThermal-Sensor-System
claraanhtran
152.4 × 40.6 mm6 parts2LMIT0
AVR/ArduinoTubePinchValve
kcsmith-uiuc
65 × 95 mm6 parts2LNo license0
AVR/ArduinoDeskPet-A-well being assistant
Cherish-everything
91.5 × 59.5 mm6 parts2LNo license0
AVR/ArduinoSimple counter rs
sephynox
68.8 × 53.6 mm6 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