2,233 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.
AVR/ArduinoSii9022a Breakout
gregdavill
45 × 35 mm65 parts4LNo license9
SN65DSI86 hat
brendena
55.8 × 58.4 mm63 parts4LNo license9
FPGAIntel 10M02SCE144 Breakout Board
Otter-IO
82.6 × 53.3 mm61 parts2LGPL-3.09
FPGAEcp5 analog video
jboone
80 × 46 mm61 parts4LNo license9
RPi-HAT-RGBW-LED-Controller
mikelawrence
65 × 56 mm54 parts2LMIT9
STM32STM32F405RGT6 STUnoPlus
r-pv
42.3 × 55.8 mm53 parts2LGPL-3.09
Alchitry IO Shield
adsehgal
65 × 45 mm51 parts2LNo license9
STM32Picowalker-32
mamba2410
44.1 × 51 mm50 parts2LNo license9
ESP32ESP32Marauder
yyewolf
78.5 × 20.1 mm45 parts2LMIT9
RPi-Hat-Thermocouple
65 × 56 mm40 parts2LMIT9
AVR/ArduinoAtmega328p standalone board
BenRoe
47 × 88 mm29 parts2LNo license9
STM32Windnerd-Core
windnerd-labs
88 × 17.1 mm25 parts2LCERN-OHL-S-2.09
CAN-Transceiver-MCP2518-board hardware design
SolderedElectronics
38 × 22 mm20 parts2LTAPR-OHL-1.09
AVR/ArduinoArduino Battery Powered clone with extended EEPROM and clock
Ikarthikmb
42.2 × 30.5 mm17 parts2LNo license9
DRV8874-breakout board
szolotykh
27 × 40 mm13 parts2LMIT9
Kicad feather wing template
Bucknalla
50.8 × 22.9 mm2 parts2LMIT9
IMX8MP-SOM-EVB
OLIMEX
154.6 × 101.8 mm317 parts4LGPL-3.08
AVR/ArduinoOpenHardwareExG Shield
OpenElectronicsLab
125.1 × 59.7 mm195 parts4LCERN-OHL-1.28
Microchip SAMIMX6ULL tryout
cebrax
100 × 75 mm171 parts4LGPL-3.08
RK3328-SOM-EBV
99.1 × 78.7 mm128 parts4LGPL-3.08
STM32Led driver
Jana-Marie
41.6 × 32.6 mm112 parts4LCERN-OHL-S-2.08
ESP32LAN-Module-PoE-Castellated
jorticus
25.3 × 61 mm101 parts2LCERN-OHL-S-2.08
CNCHat
kajusK
85 × 56 mm98 parts2LNo license8
STM32Stm32f0-can mini breakout
NerdyProjects
91.4 × 53.7 mm98 parts2LNo license8
PiGarage
bryce-builds
65 × 56 mm77 parts2LCERN-OHL-S-2.08
ESP32ProtogenControllerV1
coelacant1
65 × 52 mm59 parts4LGPL-3.08
RP2040/RP2350Rpboard squared
euvalennn
31.3 × 67 mm56 parts2LNo license8
Gm proto e1
fm4dd
100 × 70 mm53 parts2LCERN-OHL-P-2.08
FPGAIce4pi
lightside-instruments
65 × 30 mm52 parts4LTAPR-OHL-1.08
ESP32ESP32-H2-MINI-1
74th
50.3 × 60.4 mm46 parts2LMIT8
Si5351BCBreakout
etherkit
42 × 60 mm41 parts2LNo license8
AVR/ArduinoBATS
brico-labs
68.9 × 53.6 mm28 parts2LNo license8
Sdl breakout
kir486680
136.5 × 31 mm27 parts2LNo license8
ESP32Smart plants breakout rev1
vektorious
48.3 × 48.3 mm23 parts2LMIT8
Load cell ampfilier-HX711-board hardware design
22 × 22 mm18 parts2LTAPR-OHL-1.08
Rasp latch button
aresta
22.1 × 20.3 mm15 parts2LNo license8
Browse boards by part
AMS1117-3.3 1034USBLC6-2SC6 836RP2040 609W25Q128JVS 388TL072 309AP2112K-3.3 308TL074 274ESP32-S3-WROOM-1 266CH340C 242L7805 224Pico 21874HC595 213USBLC6-2P6 200LM358 19074LS04 175AP2112K-3.3TRG1 173ESP32-WROOM-32 167SRV05-4 165Arduino_Nano_v3.x 15974LS245 156LM7805_TO220 15574LS138 152W25Q128JVSIQ 15174LS32 148