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.
915Mhz
brainstorm
45.7 × 47.5 mm14 parts2LNo license2
LIN-Transceiver-NCV7329-MASTER-breakout hardware design
SolderedElectronics
22 × 38 mm14 parts2LTAPR-OHL-1.02
24vModbusInterface
timshac
75.5 × 22.9 mm14 parts2LCERN-OHL-P-2.02
AVR/ArduinoFade
konspyre
34.7 × 16.8 mm14 partsCustom license2
SA818 DIL
galopago
36 × 48.3 mm13 parts2LMIT2
AVR/ArduinoMega nrf24 usb
douglaslyon
14.2 × 36 mm12 partsGPL-3.02
Raspberry PiSnappi zero
tylercrumpton
65 × 33 mm11 parts2LNo license2
LSM6DSV-Breakout
HackableElectronics
16.5 × 20.3 mm11 parts2LGPL-3.02
WCH CH32/CH55xDevelopment board ch552
ricelectric
32.5 × 15.8 mm10 parts2LMIT2
AS5047P-Board
Westly-Bouchard
28.8 × 27.8 mm10 parts2LCERN-OHL-W-2.02
AVR/ArduinoPro micro adb shield
cnorthway
18 × 43.5 mm9 parts2LBSD-2-Clause2
IP2721-USB-C-breakout
louiscklaw
100 × 100 mm9 parts2LNo license2
PCF2131-breakout
rroels
34.2 × 19 mm9 parts2LNo license2
I2c over rj45
rmingon
45 × 30 mm9 parts2LCERN-OHL-S-2.02
NYSM2 Evaluation CarrierBoard
BoltzRnD
90.3 × 24.8 mm8 parts2LGPL-3.02
Teensy4 usb host breakout
blackketter
24.1 × 15.2 mm8 parts2LNo license2
Bh1900nux breakout board
B48D81EFCC
7.8 × 22.2 mm8 parts2LNo license2
SDR-Carrier-Board
M2I-CySat
75 × 107 mm7 parts2LNo license2
Joystick 2-axis with pushbutton breakout
38 × 38 mm7 parts2LTAPR-OHL-1.02
LT3090 breakout
PatrickBaus
10.2 × 14.6 mm7 parts2LCERN-OHL-1.22
RP2040/RP2350PicoMKRAdapter
generationmake
51 × 28 mm5 parts2LCustom license2
Hall effect sensor
22 × 22 mm5 parts2LTAPR-OHL-1.02
ADXL343-Eval-Board
fatihdedeic
10.5 × 15.5 mm5 parts2LNo license2
FT2232HL-development board adapters
atoomnetmarc
37.6 × 51.3 mm4 parts2LApache-2.02
Thonkiconn breadboard adapter v3
joem
24.1 × 21 mm4 parts2LNo license2
Non standard type c breakout
minibois
7.6 × 4.8 mm3 parts2LNo license2
005 breadboard
brianredbeard
22.9 × 55.9 mm3 parts2LNo license2
A7139-Breakout
mcauser
17.8 × 22 mm2 parts2LMIT2
BreadShield
forrestbao
72.4 × 59.6 mm2 parts2LCC-BY-SA-4.02
StickMk2-connectors
AntonKrug
2 parts2LNo license2
3E-300015-32 (Female 90 Mini DIN 10)
KytorIndustries
29.1 × 18.9 mm2 parts2LNo license2
ESP32ARGB-WLED-PC-Controller
jwidess
1 parts2LAGPL-3.02
KoalaByte-Zero
greatwhitek9-lab
120 × 85 mm1 parts2LNo license2- schematic only · 12 parts
BME280-STEMMA-QT-Breakout
lilnetty43
12 partsCustom license2 
RP2040/RP2350Dev real
iamdarshg
105 × 105 mm310 parts4LNo license1
FPGAGLOWCOST-2v2-mppcInterface-
tharinduudu
65 × 56.5 mm194 parts6LNo license1
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