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/ArduinoHotBox
sundr007
100 × 100 mm29 parts2LGPL-2.01
AVR/ArduinoDna puzzle electronics
scimusmn
127 × 66 mm29 parts2LNo license1
AVR/ArduinoZ80-arduino
stefanberndtsson
94 × 75.6 mm28 parts2LNo license1
AVR/Arduino6-key-Macro-Pad
EriicLii
88.9 × 48.3 mm28 parts2LNo license1
AVR/ArduinoNSSL EFM Analog
LeemanGeophysicalLLC
44.5 × 31.8 mm27 parts4LMIT1
AVR/ArduinoDiy shift indicator
Rav4s
99 × 68 mm27 parts2LGPL-3.01
AVR/ArduinoTuner
dl9lj
81 × 55 mm26 parts2LMIT1
AVR/ArduinoOzone sensor-MQ131-breakout with easyC-hardware design
SolderedElectronics
22 × 54 mm26 parts2LTAPR-OHL-1.01
AVR/ArduinoCO-sensor-MQ7-breakout with easyC-hardware design
22 × 54 mm26 parts2LTAPR-OHL-1.01
AVR/ArduinoToadstool-Mega328
CrashBangProto
49.5 × 81.2 mm26 parts2LGPL-3.01
AVR/ArduinoSPEED GOVERNOR TRIAL 1
KaburaJ
61 × 57.8 mm26 parts2LNo license1
AVR/ArduinoHpil
gIzFer
49.9 × 78.1 mm26 parts2LAGPL-3.01
AVR/ArduinoNatural gas--LPG-sensor-MQ5-breakout with easyC-hardware design
22 × 54 mm26 parts2LTAPR-OHL-1.01
AVR/ArduinoBenzene--Toluene--Acetone--Formaldehyde sensor-MQ138-breakout with easyC-hardware design
22 × 54 mm26 parts2LTAPR-OHL-1.01
AVR/ArduinoShortywithdisplay
theflyingsquirrel88
86 × 96 mm25 parts2LGPL-3.01
AVR/ArduinoLoad cell ampfilier-HX711-board with easy-C-hardware design
38 × 22 mm25 parts2LTAPR-OHL-1.01
AVR/ArduinoMZ-700 SD-NiseRamFile
yanataka60
77 × 145 mm25 parts2LMIT1
AVR/ArduinoFram prototype
uw-madison-chem-shops
91.4 × 66 mm25 parts2LCERN-OHL-P-2.01
AVR/ArduinoArduino nano compatible shield
Aryan-git-byte
59 × 57.3 mm25 parts2LNo license1
AVR/ArduinoLuci sdk encoders
lucimobility
68.6 × 53.3 mm25 parts2LApache-2.01
AVR/ArduinoSlice PRTO THTA S2L
feastorg
70 × 100 mm25 parts2LGPL-3.01
AVR/ArduinoMCU-Data-Logger
VishwanathKambalyal
53 × 40.3 mm25 parts2LNo license1
AVR/ArduinoPs2 mouse to serial port adapter in a box
knightfox75
90 × 70 mm24 parts2LMIT1
AVR/ArduinoSenior design
alaza252
50 × 60 mm24 parts2LNo license1
AVR/ArduinoZ80P600
Flat-Labs
24.2 × 51.6 mm24 parts2LNo license1
AVR/ArduinoMqtt particle sensor
91.4 × 66 mm24 parts2LNo license1
AVR/ArduinoSoylent
kulp
17.8 × 22.9 mm24 parts2LNo license1
AVR/ArduinoKikad dsign
sarpharaj-09
114 × 84 mm24 parts2LNo license1
AVR/ArduinoOLnodeV05
ktt-ol
36.8 × 45 mm23 parts2LNo license1
AVR/ArduinoMaster thesis
anniberi
160 × 100 mm23 parts2LNo license1
AVR/ArduinoFireboxRebooter
Qeteshpony
40 × 40 mm23 parts4LMIT1
AVR/ArduinoAttiny85 charlie circle
rsedak
70 × 70 mm22 parts2LCustom license1
AVR/ArduinoDevBoard
Apishrana
36 × 70.5 mm22 parts2LNo license1
AVR/ArduinoUG56-attiny13a pwm controller
universalgeek56
25 × 31.5 mm21 parts2LMIT1
AVR/ArduinoLineFollower V2.0
Tonikiller10000
49.5 × 44.5 mm21 parts2LNo license1
AVR/ArduinoSsd
IanFeldman
102.3 × 33.8 mm21 parts2LNo license1
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