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/ArduinoUkiha draft
e3w2q
200 × 88 mm128 parts2LMIT29
AVR/ArduinoVwcdpic with BT
tomaskovacik
68.1 × 49.8 mm102 parts2LGPL-2.029
AVR/ArduinoProject OAK MAIN BRD V0.1
0101shift
42.6 × 42.6 mm99 parts6LMIT29
AVR/ArduinoAcoustic beamforming
CGrassin
68.6 × 81.3 mm51 parts2LMIT29
AVR/ArduinoBeebSCSI
Domesday86
65.5 × 50.8 mm47 parts2LNo license29
AVR/ArduinoSD2IEC Pluggable
hackup
50 × 49.4 mm44 parts2LNo license29
AVR/ArduinoAvBadge 2020
AerospaceVillage
134.3 × 140 mm20 parts2LNo license29
AVR/ArduinoMini4wdchrono
Pimentoso
34.5 × 45.8 mm5 parts2LMIT29
AVR/ArduinoOpenkey cps2
jwestfall69
27.5 × 28.3 mm2 parts2LUnlicense29- schematic only · 56 partsAVR/Arduino
GranulArduino
benjiaomodular
56 partsMIT29 
AVR/ArduinoLimeRFE
myriadrf
141.1 × 178.5 mm1325 partsNo license28
AVR/ArduinoAdelheid plus
dcpedit
339.1 × 143.2 mm322 parts2LMIT28
AVR/ArduinoMain
johannesstrueber
30 × 110.5 mm49 parts2LCC-BY-NC-4.028
AVR/ArduinoSidewinderToUSBV2
Kreeblah
41.9 × 39.6 mm27 parts2LCC-BY-SA-4.028
AVR/ArduinoPC-8001 SD
yanataka60
100 × 100 mm19 parts2LMIT28
AVR/Arduino88RPI
ccadic
231.3 × 162 mm160 parts2LNo license27
AVR/ArduinoC128SX MX Keyboard
sjgray
404.4 × 137.6 mm136 parts2LNo license27
AVR/ArduinoDiymetro
tomarus
162.8 × 100 mm115 parts2LNo license27
AVR/ArduinoArduino mega all pins
101.6 × 53.3 mm76 parts2LCustom license27
AVR/ArduinoGNBoard (Shield for Arduino Mega)
CarlosGS
80.8 × 55.4 mm56 partsNo license27
AVR/ArduinoMa panelized
T3nk4I
50 × 30 mm35 parts2LGPL-2.027
AVR/ArduinoMZ80K SD
100 × 100 mm21 parts2LMIT27
AVR/ArduinoArduino Mega
metacollin
101.6 × 53.3 mm13 parts2LMIT27
AVR/ArduinoWii-BVM-Card
Shank-Mods
105 × 160 mm106 parts2LNo license26
AVR/ArduinoOffshoots
MiguelDeTrool
30 × 128.3 mm49 parts2LGPL-3.026
AVR/ArduinoSmartEffector
Duet3D
84.1 × 72.8 mm45 parts2LCERN-OHL-1.226
AVR/Arduino2d xmas tree
designer2k2
97.2 × 99.7 mm32 parts2LMIT26- schematic only · 15 partsAVR/Arduino
Kicad firmware generation
DLR-RY
15 partsMIT26 
AVR/ArduinoSAMPad
mohitg11
73.2 × 116 mm149 parts2LNo license25
AVR/ArduinoMain board
m0xpd
108 × 88 mm124 parts2LCC-BY-SA-4.025
AVR/ArduinoRetroARDUInput
RetroFuturisticEngineer
148.3 × 116.6 mm37 parts2LLGPL-2.125
AVR/ArduinoPsxControllerShield
SukkoPera
68.6 × 53.3 mm26 parts2LCustom license25
AVR/ArduinoZXEVO.1010
UzixLS
100 × 100 mm242 parts2LNo license24
AVR/ArduinoDynamis
bbrfkr
9.1 × 18.3 mm198 parts2LMIT24
AVR/ArduinoBonsai
Retne01
348.5 × 165.6 mm191 parts2LNo license24
AVR/ArduinoLyra alpha
PiKeeb
322.3 × 82.1 mm165 parts2LCustom license24
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