2,263 open source boards in Dev boards & breakouts
Development boards, breakouts, shields, HATs and carrier boards. 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.
Bb ledbar
qboards
15.8 × 21 mm34 parts2LCC-BY-SA-4.02
CR-150-R4b
CrematInc
58.4 × 94 mm33 parts2LMIT2
AVR/ArduinoLisa-Twiggy-Breakout-Board
DosFox1
198.1 × 50.8 mm32 parts2LGPL-3.02
AVR/ArduinoSyzygy breakout flash-LVL
adamcritchley
44.6 × 90 mm32 parts4LMIT2
AVR/ArduinoGNSS GPS L86-M33 breakout with easyC
SolderedElectronics
54 × 38 mm31 parts2LTAPR-OHL-1.02
Raspberry PiRaspberry-Pi-Hat for-AstroArch
FireNWater
86.5 × 56.5 mm31 parts2LNo license2
Microchip SAMSAMD21-breakout
atoomnetmarc
61.5 × 25 mm30 parts2LApache-2.02
STM32PCB-Design-STM32-Dev-Board
SurajSonawane2415
38.1 × 30.2 mm30 parts2LNo license2
ESP32MOSFEaTher
MartinWeigel
63.5 × 51.5 mm30 parts2LNo license2
KiCad-GD32F207RG-Pixel-8
vanvught
65.5 × 55 mm29 parts2LMIT2
RP2040/RP2350Jackco esp32-pico
huming2207
57.2 × 24.6 mm29 parts2LNo license2
AVR/ArduinoJeden board
Wojtekb30
62.5 × 61.5 mm29 parts2LCustom license2
6502 DEV Board
acwright
100 × 100 mm29 parts2LCERN-OHL-P-2.02
STM32Opy1
EvanDesR
33.2 × 31.4 mm29 parts2LNo license2
AVR/ArduinoMain
teostefan
65 × 30 mm28 parts2LNo license2
STM32Stm32 minimal dev
amrithHN
53.3 × 35.6 mm28 parts2LGPL-3.02
ESP32ESP-32-Dev-Board
Fred98246
25.4 × 62.7 mm27 parts4LMIT2
NXPLpc812-breakout
elevendroids
23 × 37.5 mm27 parts2LCC-BY-SA-4.02
Raspberry PiOpen-Geiger-Mueller
schwallsunk
128.1 × 79.6 mm27 parts2LGPL-3.02
Particle somduino
epietrowicz
68.6 × 53.3 mm26 parts2LNo license2
STM32STM32h743-devboard betaflight
CK20000
58.2 × 68.2 mm24 parts4LMIT2
ESP32ESP32-Dev-Kit-Clone
BrijModi
47 × 29.2 mm24 parts2LNo license2
Arduino eeprommer
tmssngr
61 × 54.6 mm23 parts2LNo license2
Din-6-breadboard
baldengineer
40.6 × 19.1 mm23 parts2LMIT2
AVR/ArduinoAtmega32
vedantjadhav304
66.8 × 46 mm23 parts2LNo license2
AVR/ArduinoRelay driver shield
njh
35.6 × 46.4 mm21 parts2LCC-BY-SA-4.02
Soldered-CAN-Transceiver-MCP2518-board hardware design
test-gh-syncer2
22 × 38 mm20 parts2LTAPR-OHL-1.02
ESP8266Curio
phybros
52.8 × 19.3 mm20 parts4LCC-BY-SA-4.02
Micromodem
kareiva
20.4 × 68.1 mm19 parts2LNo license2
STM32Bit32F042F6Px
FaizeenHoque
27 × 18.7 mm19 parts4LCERN-OHL-S-2.02
ESP32Wemos baseplate
Karijn
138.1 × 55 mm18 parts4LNo license2
SMPS-Board
AlecRossCS
38.1 × 63.5 mm18 parts2LMIT2
ADC-16-bit-ADS1115-4-channel with-PGA-breakout hardware design
22 × 22 mm17 parts2LTAPR-OHL-1.02
MicroSD-card reader breakout hardware design
22 × 38 mm16 parts2LTAPR-OHL-1.02
Nicerf lora
fadushin
39 × 27.3 mm15 parts2LBSD-3-Clause2
24vModbusInterface
timshac
75.5 × 22.9 mm14 parts2LCERN-OHL-P-2.02
Browse boards by part
AMS1117-3.3 1069USBLC6-2SC6 866RP2040 632W25Q128JVS 394TL072 319AP2112K-3.3 313TL074 281ESP32-S3-WROOM-1 268CH340C 249L7805 229Pico 22174HC595 218USBLC6-2P6 206LM358 20074LS04 180AP2112K-3.3TRG1 179ESP32-WROOM-32 169LM7805_TO220 167SRV05-4 165Arduino_Nano_v3.x 16474LS245 160W25Q128JVSIQ 15774LS138 15574LS32 152