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/ArduinoRam Tester
tops4u
39.8 × 59.4 mm35 parts2LGPL-3.0111
AVR/ArduinoKeebcard
rsheldiii
61 × 36.8 mm14 parts2LNo license111
AVR/ArduinoQEZ
str-dst
194.3 × 79 mm78 parts2LCC-BY-NC-4.0110
AVR/ArduinoBgkeeb
sadekbaroudi
98.4 × 90.7 mm102 parts2LNo license108
AVR/ArduinoSdbox
jbilander
55 × 59 mm18 parts2LGPL-3.0108
AVR/ArduinoUA4C-vC5
turboedge
100 × 99.8 mm213 parts2LGPL-2.0107
AVR/ArduinoArduino Spot Welder V4
KaeptnBalu
50 × 77 mm55 parts2LGPL-3.0107
AVR/ArduinoArduino ads129x
OpenElectronicsLab
197 × 71 mm267 partsGPL-3.0102
AVR/ArduinoOpenTKL
ojthetiny
344 × 124 mm175 parts2LGPL-3.0102
AVR/ArduinoFor science
peej
92 × 92 mm53 parts2LMIT100
AVR/ArduinoChoctopus44
SlightHeadache
247.4 × 121.4 mm102 parts2LMIT99
AVR/ArduinoSmartSupply
ThomasVDD
169.3 × 128 mm131 parts2LCustom license96
AVR/ArduinoGamma split
ahtn
109 × 71 mm120 parts2LNo license96
AVR/ArduinoApple2Card
profdc9
160 × 78.2 mm77 parts2LNo license95
AVR/ArduinoTTY
KALTCHUK
99.7 × 69.9 mm43 parts2LNo license94
AVR/ArduinoFinalgrom99
endlos99
100.2 × 63.1 mm29 parts2LGPL-3.094
AVR/ArduinoModel-M-Type-C
ashpil
118.3 × 38.9 mm22 parts2LGPL-3.094
AVR/ArduinoArduino UNO R4 WiFi
sabogalc
68.6 × 53.3 mm217 parts4LWTFPL93
AVR/ArduinoRepeater v2
plusvic
30.7 × 76.1 mm16 parts2LCC0-1.093
AVR/ArduinoGenny
superjoebob
100 × 100 mm102 parts2LNo license92
AVR/ArduinoWren universal
oliviahanley
227.7 × 112.8 mm97 parts2LMIT92
AVR/ArduinoFreifunk open mppt
elektra42
61 parts2LCustom license89
AVR/ArduinoPCIce
ZoidTechnology
110 × 99.6 mm18 parts2LGPL-3.089
AVR/ArduinoCapacitive soil moisture sensor
RonMcKay
185.3 × 23 mm18 parts2LNo license88
AVR/ArduinoFlypi
amchagas
57.2 × 146.6 mm49 parts2LGPL-2.087
AVR/ArduinoGingham
yiancar
285.8 × 123.8 mm160 parts2LCC-BY-NC-4.085
AVR/ArduinoHumla
jimmerricks
210.2 × 94.3 mm77 parts2LMIT85
AVR/ArduinoPaperBack Converter
dqydj
76.2 × 76.2 mm75 parts2LMIT83
AVR/ArduinoOxygen concentrator
RepRapLtd
68.6 × 53.3 mm34 parts2LGPL-3.083
AVR/ArduinoMidiMood
silveirago
422.4 × 118.2 mm45 parts2LNo license81
AVR/ArduinoLight-Rail
nonik0
73.4 × 100.5 mm209 parts4LNo license80
AVR/ArduinoTG4x
MythosMann
243 × 72.7 mm105 parts2LGPL-3.080
AVR/ArduinoSportiduino
sportiduino
73 × 94 mm40 parts2LGPL-3.077
AVR/ArduinoPower Supply (plus UBBB 32u4 rev 1.2)
thebiguno
99.1 × 99.1 mm189 parts2LNo license75
AVR/ArduinoLitl keyboard
mohoyt
248.3 × 99.8 mm103 parts2LCC-BY-NC-4.075
AVR/ArduinoMicroBit328
StuckAtPrototype
17.7 × 12.1 mm23 parts2LNo license75
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