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/ArduinoAMR Krabbler
maxikuehn
38 × 47 mm16 parts2LMIT0
AVR/ArduinoCamp
notazizelse
80 × 80 mm16 parts2LNo license0
AVR/ArduinoArduino ISP Shield
DennisSchulmeister
68.6 × 53.3 mm16 parts2LCC-BY-4.00
AVR/ArduinoRGB LED controller
42CrMo4
35.5 × 15 mm16 parts2LNo license0
AVR/ArduinoOdoconv
movatica
51 × 27.9 mm16 parts2LNo license0
AVR/ArduinoArduino temperature controlled fan
marknkan
262.8 × 161.9 mm16 parts2LMIT0
AVR/ArduinoInf microcontroladores
gumadeiras
64.4 × 51 mm16 parts2LMIT0
AVR/ArduinoTeensy20TestBoard
codingbychanche
68 × 51 mm16 parts2LNo license0
AVR/ArduinoBinaryClock
JaredWright
28.5 × 41.7 mm16 parts2LNo license0
AVR/Arduino2020 2021-Demo4all
MOSH-Insa-Toulouse
68.6 × 53.3 mm16 parts2LMIT0
AVR/ArduinoArduinoisp attiny-8-pin
Cosmin2106
31.5 × 52.8 mm16 parts2LApache-2.00
AVR/ArduinoAutoWire-Cutter-Stripper
dnatov
59.7 × 38.1 mm16 parts2LNo license0
AVR/ArduinoMicro wwvb
chgenly
42.6 × 40.6 mm16 parts2LMIT0
AVR/ArduinoNRF24L01-Wireless-Communication
rajsandeep2410-maker
116.9 × 90.7 mm16 parts2LNo license0
AVR/ArduinoTimrrr
johnowhitaker
32 × 32 mm16 parts2LNo license0
AVR/ArduinoBadge ICA2026
natpoor
19.5 × 4.1 mm16 parts2LNo license0
AVR/ArduinoEV-Battery-Level-Indicator-Using-ATtiny85-7-Segment-Display
manoj-karna17
136 × 60 mm15 parts2LNo license0
AVR/ArduinoATtiny85-Breakout
Abhi90808
35 × 30 mm15 parts2LNo license0
AVR/ArduinoAVR ATmega328P PCB Task01
DhruvBalsara
112.5 × 70 mm15 parts2LNo license0
AVR/ArduinoXUM-1541
Beaupre-Circuit-Design
60 × 60 mm15 parts2LMIT0
AVR/ArduinoSdvx
bass9030
42 × 65 mm15 parts2LNo license0
AVR/ArduinoCmote
Person-0
21.2 × 30.6 mm15 parts4LNo license0
AVR/ArduinoRaindrop
ARTS-Laboratory
30.5 × 67.3 mm15 parts2LCC-BY-SA-4.00
AVR/ArduinoBadge blob
HeyPCB
63.2 × 85 mm15 parts2LCERN-OHL-S-2.00
AVR/ArduinoSmartHeater-CTRLModule
ghostking2802
71 × 62 mm15 parts2LNo license0
AVR/ArduinoMotorcin bien temperado
granjero
79.4 × 43.6 mm15 parts2LNo license0
AVR/ArduinoArduCore-Custom-Arduino-Board
urjadoshi2024etc-creator
52 × 57.5 mm15 parts2LCustom license0
AVR/ArduinoResettableI2CHubForM5Stack
asukiaaa
50 × 50 mm15 parts2LNo license0
AVR/ArduinoAttiny led circle
alejandrogallo
43.2 × 68.9 mm15 parts2LNo license0
AVR/ArduinoV1
34.9 × 53.3 mm15 parts2LCC-BY-SA-4.00
AVR/ArduinoLED-Keychain
yansha2903-bot
138.9 × 99.4 mm15 parts2LNo license0
AVR/ArduinoAmd flash programmer
bazsimarkus
60 × 90 mm15 parts2LNo license0
AVR/ArduinoVoltage monitor
lwa-project
95.3 × 78.7 mm15 parts2LGPL-2.00
AVR/ArduinoAutomatic-Chessboard
RONITERVO
200 × 52.2 mm14 parts2LCC-BY-NC-4.00
AVR/ArduinoTinyWatch
Peer202
50.5 × 47.5 mm14 parts2LNo license0
AVR/ArduinoLED-Pong
lmtreser
69.1 × 53.9 mm14 parts2LMIT0
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