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/ArduinoOc DevKit2
SuperMechaCow
35 × 43 mm39 parts2LMIT20
AVR/ArduinoMini-SMD
colinleroy
65.1 × 97 mm28 parts2LMIT20
AVR/ArduinoAtmega16 breakout
abzman
111.8 × 88.9 mm44 parts2LUnlicense19
AVR/Arduino1.3
OpenLogicEFI
100 × 100 mm156 partsNo license18
AVR/ArduinoRouting Board
Bad-Dog-Designs
229 × 96 mm131 parts2LNo license18
AVR/ArduinoMotherboard
bfrigon
99.1 × 39.4 mm76 parts2LCC-BY-SA-4.018
AVR/ArduinoM644/M1284 breakout board
maxxir
54.9 × 45 mm60 partsNo license18
AVR/ArduinoOpenkey cps1
jwestfall69
108.3 × 80.5 mm18 parts2LUnlicense17
AVR/ArduinoUdon
uw-x
68.6 × 53.3 mm8 parts2LCERN-OHL-W-2.017
AVR/ArduinoLights
telec16
50 × 200 mm115 parts2LNo license16
AVR/ArduinoMz-2000
yanataka60
115.8 × 142.8 mm25 parts2LMIT16
AVR/ArduinoAraBase atmega2560
AravinthPanch
100 × 100 mm21 parts2LApache-2.016
AVR/ArduinoWasdat
evyd13
55.5 × 33 mm20 parts2LCC-BY-SA-4.016
AVR/ArduinoLCD HAT
bitbank2
45.7 × 53.4 mm11 parts2LApache-2.016
AVR/ArduinoProgrammer
heyspacebuck
17.8 × 54 mm5 parts2LBSD-3-Clause16
AVR/Arduino60pc pcb.kicad v1.1
Connor-Devitt
306.8 × 98.5 mm153 parts2LNo license15
AVR/ArduinoSDR SSB
kholia
85.1 × 71.7 mm70 parts2LNo license15
AVR/ArduinoArd ltc2499
IowaScaledEngineering
53.3 × 68.6 mm37 parts2LNo license15
AVR/ArduinoMK7 Gripper
PlumPot55
129.5 × 58.5 mm37 parts2LNo license15
AVR/ArduinoAddon board
b1uN7
78.6 × 84.6 mm22 parts2LNo license15
AVR/ArduinoService Section Controller
olin-electric-motorsports
158.8 × 158.8 mm223 parts4LNo license14
AVR/ArduinoGH-MXAlps mini
agodinhost
294.5 × 133.2 mm106 parts2LNo license14
AVR/ArduinoFan I2C
PubInv
126.3 × 160 mm76 parts2LAGPL-3.014
AVR/ArduinoArduino Shield RC Controller
michaelshiloh
135 × 100 mm21 parts2LAGPL-3.014
AVR/ArduinoEssentials of PCB Design Starter Board
ieee-wpi
102 × 40 mm8 parts2LCC-BY-SA-4.014
AVR/ArduinoMSAP-2 rev.A SMD
mehrantsi
178 × 711 mm658 parts2LMIT13
AVR/ArduinoEndeavour-2-backup
ScatteredDrifter
190.5 × 84 mm94 parts2LCERN-OHL-P-2.013
AVR/ArduinoFRReceiverTiny
shaise
27.5 × 14.5 mm33 parts4LGPL-3.013
AVR/ArduinoAutoFlyer
mribble
35.6 × 17.8 mm18 parts2LNo license13
AVR/ArduinoSuperLyra
Malevolti
391.1 × 134.8 mm199 parts2LGPL-3.012
AVR/ArduinoPower board v1 krt experiment
misko
90 × 65 mm127 parts4LNo license12
AVR/ArduinoKicad Smart Watch old
AFLProjects
31.1 × 26 mm39 parts4LNo license12
AVR/ArduinoProject
aspro648
68.6 × 53.3 mm33 parts2LNo license12
AVR/ArduinoShieldArduino Displays7Segmentos
tidus747
68.6 × 53.3 mm19 parts2LGPL-3.012
AVR/ArduinoTt nano HAT b1
vektorious
35.6 × 49.5 mm17 parts2LCC-BY-SA-4.012
AVR/ArduinoKitt 0805
davedarko
50 × 30 mm21 parts2LNo license11
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