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/ArduinoOrch
htpkbs
313.6 × 83.8 mm155 parts2LBSD-2-Clause5
AVR/ArduinoMad hatter
raphaelfaria
337.2 × 122.6 mm154 parts2LCC-BY-NC-4.05
AVR/ArduinoVCO mki
DeMarco
98 × 135 mm147 parts2LNo license5
AVR/ArduinoKeyboard v1
augustt198
297 × 113 mm140 parts2LNo license5
AVR/ArduinoNicoEFI-ECU-Speeduino mega2561
NicoEFI
85 × 100 mm135 parts2LNo license5
AVR/ArduinoMycelium
microresearch
74.5 × 83.7 mm126 parts2LGPL-3.05
AVR/ArduinoEsr meter
vpatkov
66 × 99.1 mm101 parts2LNo license5
AVR/ArduinoDual h bridge
jayanta525
98.8 × 55.1 mm98 parts2LMIT5
AVR/ArduinoSnuadc
vitaldb
61.2 × 22.2 mm84 parts2LNo license5
AVR/ArduinoIntercom
ukmaker
100 × 100 mm82 parts2LMIT5
AVR/ArduinoMuddersMIMA
doppelhub
56 × 59 mm82 parts2LGPL-3.05
AVR/ArduinoTravis num2024
dieseltravis
85.2 × 137.8 mm81 parts2LCustom license5
AVR/ArduinoSPACEDOS01
UniversalScientificTechnologies
93.5 × 48.2 mm79 parts2LGPL-3.05
AVR/ArduinoAi03-macropad
Forge-Media
67.3 × 88.9 mm73 parts2LNo license5
AVR/ArduinoCosmoneer-Proto
cosmospioneering
70 × 50 mm71 parts4LNo license5
AVR/ArduinoPCB-Temperature-Controller
MbFredys
90.8 × 56.5 mm68 parts2LCERN-OHL-W-2.05
AVR/ArduinoMyfirstmacropad
eeble
139.7 × 69.9 mm61 parts2LCC-BY-SA-4.05
AVR/ArduinoCable Test Master
juniperlynx
50.8 × 61.6 mm59 parts2LMIT5
AVR/ArduinoArduino relay
bhaskar9980
128 × 47.4 mm58 parts2LMIT5
AVR/ArduinoOpenXstim
MonzurulAlam
69 × 53.7 mm55 parts2LNo license5
AVR/ArduinoProgrammable light
dilshan
52.2 × 79 mm50 parts2LMIT5
AVR/ArduinoDdr ps2-controller
kcuzner
100 × 40 mm46 parts2LNo license5
AVR/ArduinoBREAD Slice
FHafting
70 × 100 mm43 parts2LNo license5
AVR/ArduinoMainBoard
andresR8
55.6 × 64 mm41 parts2LNo license5
AVR/ArduinoOpenTRV-Arduino-V0p2
opentrv
65 × 56.5 mm38 partsApache-2.05
AVR/ArduinoZ80 YM2151
kuninet
100 × 75 mm36 parts2LMIT5
AVR/ArduinoMender shield
joelguittet
65 × 59 mm35 parts2LApache-2.05
AVR/ArduinoRGB LED TOY
madworm
43.4 × 43.4 mm33 partsNo license5
AVR/ArduinoDac shield
visgence
68.6 × 53.3 mm31 parts2LNo license5
AVR/ArduinoEasyPCB 10 nrf24l01p
sundberg84
50 × 49.9 mm30 parts2LNo license5
AVR/Arduino0xCB-micro
0xCB-dev
25 × 29.6 mm29 parts4LCustom license5
AVR/ArduinoPiFanIrHat
llegoff
65 × 56.5 mm28 parts2LCERN-OHL-1.25
AVR/ArduinoCBM-D9096
InsaneDruid
90.2 × 68.6 mm28 parts2LNo license5
AVR/ArduinoGenesis 6button
rfmerrill
61.7 × 36.8 mm26 parts2LMIT5
AVR/ArduinoNDriveShield
freetronics
68.6 × 53.3 mm22 parts2LNo license5
AVR/ArduinoTINYLED
adaand00
100 × 22 mm20 parts2LGPL-3.05
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