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/ArduinoDigitalTemperatureController
charlesbaynham
80 × 100 mm163 parts4LNo license14
AVR/ArduinoMatt3o-CA
agodinhost
286.1 × 96.2 mm156 partsNo license14
AVR/ArduinoSquid60
Alasofia
269.9 × 87.3 mm143 parts2LCC-BY-NC-4.014
AVR/ArduinoLeft Frame
FlightDeckDIY
29.3 × 187.1 mm120 parts4LCC-BY-NC-4.014
AVR/ArduinoChoc40
rainkeebs
216 × 70.8 mm98 parts2LUnlicense14
AVR/ArduinoTarbleming
MiguelDeTrool
71 × 128.5 mm91 parts2LCustom license14
AVR/ArduinoPQDB-Hardware
augustocrmattos
147.3 × 146.8 mm73 parts2LNo license14
AVR/ArduinoNumpad
str-dst
99.3 × 115.8 mm60 parts2LCC-BY-NC-4.014
AVR/ArduinoEssentials of PCB Design Track 1 Board
ieee-wpi
102 × 40 mm49 parts2LCC-BY-SA-4.014
AVR/ArduinoArduinoMegaServoShield
michaelshiloh
101.6 × 53.3 mm38 parts2LAGPL-3.014
AVR/ArduinoFM-7 SD
yanataka60
100 × 100 mm17 parts2LMIT14
AVR/ArduinoMSAP-2 rev.A
mehrantsi
240 × 1056 mm658 parts2LMIT13
AVR/ArduinoKeyboard
dragonlock2
200 × 100 mm225 parts2LApache-2.013
AVR/ArduinoJayK
josuegaleas
419.1 × 101.2 mm207 parts2LApache-2.013
AVR/ArduinoEndeavour-2
ScatteredDrifter
190.5 × 83.2 mm104 parts2LCERN-OHL-P-2.013
AVR/ArduinoAngel
jamessa
270.8 × 80.8 mm97 parts2LNo license13
AVR/ArduinoOpenHarrierUFC
OpenHarrier
144 × 158 mm91 parts2LGPL-3.013
AVR/ArduinoSplitty ergonomic keyboard
schodet
133.4 × 100.3 mm89 parts2LMIT13
AVR/ArduinoTtntrackernode
ttnmapper
48 × 75 mm82 parts2LNo license13
AVR/ArduinoBirthdayCakeKeyboard
JimGage
73 × 102.5 mm61 parts2LNo license13
AVR/ArduinoElectric Eel Wheel 5
mribble
62 × 48.9 mm59 parts2LNo license13
AVR/ArduinoPlipUltimate
tehKaiN
50 × 50 mm51 parts2LGPL-2.013
AVR/ArduinoNeuroBytes
zakqwy
56.4 × 30.9 mm50 parts2LGPL-3.013
AVR/ArduinoFRReceiverLVH
shaise
27.5 × 14.5 mm33 parts4LGPL-3.013
AVR/ArduinoController
Miceuz
130 × 60 mm33 parts2LApache-2.013
AVR/ArduinoBikepixel
kstopa
80 × 20.1 mm14 parts2LNo license13
AVR/ArduinoAttiny85-dev board
tomasr8
44.6 × 16.6 mm13 parts2LMIT13- schematic only · 244 partsAVR/Arduino
PhotonSaw
openspaceaarhus
244 partsApache-2.013 
AVR/ArduinoEc0board
digitalrane
348.1 × 120.9 mm368 parts2LNo license12
AVR/ArduinoHw openmower yardforce
xtech
180 × 170 mm275 parts4LCC-BY-4.012
AVR/ArduinoGh80-1800
retoid
381 × 148.2 mm246 parts2LNo license12
AVR/ArduinoJones
jpskenn
285 × 95.1 mm211 parts2LMIT12
AVR/ArduinoSuperLyra
Malevolti
391.1 × 134.8 mm199 parts2LGPL-3.012
AVR/Arduino6502 ACE Board
acwright
335 × 250 mm183 parts2LCERN-OHL-P-2.012
AVR/ArduinoPhoebe Keyboard
Maxr1998
229.9 × 97.8 mm153 parts2LNo license12
AVR/ArduinoCyclops
westfoxtrot
311.4 × 93.5 mm152 parts2LCC-BY-SA-4.012
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