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/ArduinoArduino Spot Welder V3
KaeptnBalu
50 × 60 mm58 parts2LGPL-3.0207
AVR/ArduinoInfidel sensor
drspangle
50 × 20 mm16 partsCC0-1.0207
AVR/ArduinoSmu main 1
jaromir-sukuba
130 × 80 mm206 parts2LNo license188
AVR/ArduinoSplitFlapDriverATtiny1616V4.kicad
adamgmakes
30 × 60 mm25 parts2LNo license182
AVR/ArduinoTorn Keyboard - Left
EanNewton
140.8 × 115.7 mm68 parts2LMIT178
AVR/ArduinoPCB-reflow solder heat plate
DerSpatz
100 × 100 mm47 parts2LMIT177
AVR/Arduino65C02 Computer
dbuchwald
203.2 × 149.9 mm62 parts2LMIT176
AVR/ArduinoSuper Sixteen v1
matthewcieplak
111.3 × 106.4 mm141 parts2LNo license172
AVR/ArduinoEV Charger
fotherja
118 × 103.5 mm53 parts2LMIT166
AVR/Arduino1002 EPROM EMU NG 2.2d
Kris-Sekula
99.1 × 88.9 mm42 parts2LApache-2.0161
AVR/ArduinoMiniscope v4-Rigid-Flex
Aharoni-Lab
30 × 57.3 mm109 parts6LGPL-3.0157
AVR/ArduinoZ-probe on smd resistors-2512
IvDm
15.3 × 19.3 mm17 parts2LGPL-3.0150
AVR/ArduinoSnopf
snopf
14 × 17.3 mm16 parts2LGPL-2.0145
AVR/ArduinoLagom
mohoyt
305.6 × 121.8 mm167 parts2LCC-BY-NC-4.0143
AVR/ArduinoSharpikeebo
ccadic
66 × 115.3 mm190 parts4LNo license142
AVR/ArduinoCHORD VCO
ijnekenamay
30 × 100 mm37 parts2LNo license142
AVR/ArduinoLofence
kiu
78 × 130 mm57 parts2LMIT141
AVR/ArduinoSmall paintbrush
artseyio
94 × 47 mm19 parts2LNo license135
AVR/ArduinoADX
WB2CBA
97.1 × 97 mm68 parts2LNo license133
AVR/ArduinoVGAtonic
dqydj
78.3 × 74.6 mm56 parts2LNo license133
AVR/ArduinoAlphabets V2 ATtiny1624 millable ring module
TheBeachLab
50 × 50 mm26 parts2LMIT133
AVR/ArduinoAdelheid Plus
Skycode22
339.1 × 143.2 mm322 parts2LNo license132
AVR/ArduinoFramework
stevennguyen
238.1 × 375.5 mm151 parts2LNo license131
AVR/ArduinoLHS Controller
dmcke5
26.5 × 26.5 mm61 parts2LCERN-OHL-S-2.0131
AVR/ArduinoMemtype
jim17
25.5 × 14.5 mm18 parts2LCC-BY-4.0131
AVR/ArduinoKyuu
Quantrik
303.6 × 96.2 mm153 parts2LCC-BY-NC-4.0126
AVR/ArduinoC64 Saver addon board
bwack
43.9 × 29 mm42 parts2LCERN-OHL-1.2123
AVR/ArduinoLICSTER
thainnos
68.6 × 53.3 mm72 parts2LMIT122
AVR/ArduinoTS65AVR
mohitg11
299.5 × 105.8 mm428 partsNo license119
AVR/ArduinoPrusa chain production
d-weber
55.9 × 76.2 mm18 parts2LCC-BY-NC-4.0119
AVR/ArduinoMegaMIDI
AidanHockey5
100 × 100 mm102 parts2LAGPL-3.0116
AVR/ArduinoScout
oskitone
145.3 × 44.5 mm38 parts2LCustom license114
AVR/ArduinoFranzininho diy board
Franzininho
51.1 × 30 mm19 partsCC-BY-SA-4.0114
AVR/ArduinoDogema48 cfx
ChrisChrisLoLo
204 × 69.4 mm117 parts2LGPL-3.0112
AVR/ArduinoC64-Switchless-Multi-Kernal-27C256-adapter
22.2 × 46.4 mm14 parts2LCERN-OHL-1.2112
AVR/ArduinoBanime40
190.5 × 76.2 mm88 parts2LCC-BY-SA-4.0111
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