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/ArduinoPSU
ThomasVDD
50 × 100 mm116 parts2LCustom license16
AVR/ArduinoHotAirGun
raspibo
104.1 × 82.6 mm68 parts2LNo license16
AVR/ArduinoPowerBrigand
schenkzoola
90 × 100 mm42 parts2LCC-BY-NC-4.016
AVR/ArduinoMatrixclock gnm-19881-bsg
WiseLord
191.8 × 48.4 mm35 parts2LNo license16
AVR/ArduinoCode
evyd13
55.5 × 33 mm29 parts2LCC-BY-SA-4.016
AVR/ArduinoCanBus-Radio-VAG
AugustoS97
39.9 × 45 mm28 parts2LNo license16
AVR/ArduinoMZ2000 SD
yanataka60
100 × 100 mm26 parts2LMIT16
AVR/ArduinoBiasPro
ToneAlchemy
33.9 × 90 mm18 parts2LMIT16
AVR/ArduinoStringsVR-SheepyHat
StringsVR
145 × 83.5 mm17 parts2LNo license16
AVR/ArduinoSMOL
heyspacebuck
14.2 × 12.2 mm13 parts2LBSD-3-Clause16
AVR/ArduinoSwinsidNeat
jsanpe
17.5 × 36.6 mm13 parts2LMIT16
AVR/ArduinoSHARP FEATHER NANO
bitbank2
43.9 × 53.1 mm12 parts2LApache-2.016- schematic only · 54 partsAVR/Arduino
GoogleMusicRadio
DanNixon
54 partsApache-2.016 
AVR/ArduinoBkm-10rlternative
skumlos
210.8 × 74.9 mm244 parts4LNo license15
AVR/ArduinoPlayground 68030 Mk I
thorpej
259.9 × 154.9 mm227 parts6LNo license15
AVR/Arduino60pc
Connor-Devitt
306.5 × 116 mm153 parts2LNo license15
AVR/ArduinoKiCad Project
CatGirlGF
257.2 × 95.3 mm109 parts2LMIT15
AVR/ArduinoSkull badge
b1uN7
163.5 × 163.5 mm101 parts2LNo license15
AVR/ArduinoZesty25
Gtrx0
96.5 × 96.5 mm87 parts2LCERN-OHL-1.215
AVR/ArduinoUltrasonicSystem
Sonicators
145 × 110 mm81 parts2LNo license15
AVR/ArduinoC245-JBC-control
radioelf
95 × 54.4 mm75 parts2LNo license15
AVR/ArduinoStepcraft-GRBLizer
eflukx
68 × 54 mm69 parts2LNo license15
AVR/ArduinoBkm-129x scart vga
105 × 160 mm67 parts2LNo license15
AVR/ArduinoPhase
mjpauly
128 × 92.6 mm66 parts2LNo license15
AVR/ArduinoRti
cceh
100 × 80 mm54 parts2LNo license15
AVR/ArduinoEmurom
jtsiomb
90.6 × 77.8 mm48 parts2LCC-BY-SA-4.015
AVR/ArduinoArd ltc2499-test
IowaScaledEngineering
122.3 × 71.1 mm40 parts2LNo license15
AVR/ArduinoMisc file bin
GadgetReboot
100 × 99.7 mm38 parts2LNo license15
AVR/ArduinoUpdi-Key
Dlloydev
56.5 × 21.6 mm32 parts2LMIT15
AVR/ArduinoHexagon
kieraneglin
56.9 × 23.6 mm20 parts2LMIT15
AVR/ArduinoCatws
kliment
50 × 50 mm15 parts2LNo license15- schematic only · 33 partsAVR/Arduino
HHW HackConRD2024
jrgdiaz
33 partsNo license15 
AVR/ArduinoImu panelized
olin-electric-motorsports
94 × 94 mm639 parts4LNo license14
AVR/ArduinoProtocol seven
dotleon
405.1 × 166.8 mm259 parts2LNo license14
AVR/ArduinoArisutea pcb rgb
mattyams
339.1 × 121 mm210 parts2LGPL-3.014
AVR/ArduinoO
PubInv
140 × 190 mm199 parts2LAGPL-3.014
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