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/ArduinoHAT CM4 DRC 1
ConnectBox
105.6 × 86.1 mm147 parts6LNo license0
AVR/ArduinoAtom47
IndianBoy42
242.2 × 72.1 mm139 parts2LNo license0
AVR/ArduinoSystem
MadsRudolph
203.1 × 152.4 mm131 parts2LNo license0
AVR/ArduinoNM27C512 Dumper
IlyaBOT
141.9 × 88.7 mm130 parts2LNo license0
AVR/ArduinoSteel form Dish washer PART 1
R-Mutura
185 × 95 mm127 parts4LNo license0
AVR/ArduinoSipm hv splitter
eshazen
63.5 × 33 mm127 parts6LNo license0
AVR/ArduinoLil-Cheat Staggered
kiiings
298.5 × 76.2 mm125 parts2LNo license0
AVR/ArduinoMain
mintexists
257.2 × 100 mm122 parts2LNo license0
AVR/ArduinoAsymRightExpandedNumpad
esouthren
250 × 126.1 mm117 parts2LGPL-3.00
AVR/ArduinoLightsensor
marc-cr1810
128 × 128 mm115 parts2LNo license0
AVR/ArduinoNrsk left
0x0c
187 × 120.3 mm114 parts2LNo license0
AVR/ArduinoSchakelbord
robbertvdzon
200 × 170 mm105 parts2LNo license0
AVR/Arduino3phaseDiverter rounded
FredM67
144.8 × 120.7 mm103 parts2LCC-BY-SA-4.00
AVR/ArduinoNote sequencer
gridbugs
159.4 × 184.3 mm101 parts2LMIT0
AVR/ArduinoChi Chi
hughminhphan
169 × 170 mm100 parts2LNo license0
AVR/ArduinoDigit
kuellenberg
107 × 213 mm98 parts2LNo license0
AVR/ArduinoNewOrder
nEDM-TUM
65 × 137 mm97 parts2LNo license0
AVR/ArduinoV2 board ecar
Jonny999999
160 × 100 mm95 parts2LNo license0
AVR/ArduinoLed matrix board
arkonique
117 × 58.5 mm95 parts4LNo license0
AVR/ArduinoNightGlow RevA
PrinceOfDuloc
160 × 160 mm91 parts2LNo license0
AVR/ArduinoSelkäsalama-64
Jan-Aarela
64.8 × 101.7 mm89 parts2LNo license0
AVR/ArduinoKeypad
Fabian0520
76.3 × 115.3 mm89 parts2LCustom license0
AVR/ArduinoFlySensei Stack RPi
denjos007
90 × 65 mm89 parts4LNo license0
AVR/ArduinoChessconnect uP
K-0hm
100 × 100 mm88 parts2LGPL-3.00
AVR/Arduino8bitdvco
eblade
100 × 100 mm87 parts2LNo license0
AVR/ArduinoAMC Template
kit-ipe
180.6 × 73.5 mm87 parts4LCERN-OHL-P-2.00
AVR/ArduinoRev2-left
celcius-plus-273
133.4 × 110.3 mm85 parts2LNo license0
AVR/ArduinoShield
apmarshall3
83.2 × 69.2 mm82 parts2LNo license0
AVR/ArduinoVizitka usb Michal modra
Meteopresscz
90 × 50 mm81 parts2LNo license0
AVR/ArduinoParticle array
ProgrammableMatter
42.4 × 42.7 mm80 parts2LNo license0
AVR/ArduinoLta logic module
kimballa
125 × 89.5 mm79 parts2LNo license0
AVR/ArduinoMotherboard23-24
RoanTractor
230 × 125 mm78 parts2LNo license0
AVR/ArduinoSuperClockController
silicagel777
139.7 × 48.3 mm77 parts2LMIT0
AVR/ArduinoUGrow3 Routed
Dhyan-M
70 × 45 mm77 parts2LNo license0
AVR/ArduinoRMK-complete LOWPRO
KarlPeter5039
341.3 × 127 mm77 parts2LNo license0
AVR/ArduinoModbus master
magnusbpt
104 × 129 mm77 parts2LNo license0
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