2,438 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.
Debug Adapter
Kononenko-K
39.5 × 56 mm25 parts2LCERN-OHL-P-2.039
Nunchuk breakout
Jana-Marie
39 × 18 mm11 parts2LGPL-3.039
ESP32LoRa-Gateway-E32
ezcGman
65.4 × 63 mm8 parts2LNo license39
RP2040/RP2350Mitayi Pico
CIRCUITSTATE
21 × 51 mm48 parts2LMIT36
FPGA2019-07-06 12:26:53 fpga hat
Wren6991
65 × 56.5 mm87 parts4LApache-2.031
LEDIO
Defdist
272.5 × 12 mm19 parts2LNo license29
HomeBus Breakout Board
gregdavill
30 × 30 mm45 parts2LNo license28
BM83 breadboard adapter
tomaskovacik
38.1 × 99.1 mm66 parts2LCustom license27
Teensy eurorack breakout
newdigate
64.8 × 109.2 mm31 parts2LMIT27
Led wing
joshajohnson
22.9 × 50 mm48 parts2LCC-BY-NC-4.026
ESP32ESP32-C6-EVB Rev A
OLIMEX
100 × 70 mm109 parts2LGPL-3.025
MAX2870/2871 Dev Board
48 × 48 mm46 parts4LGPL-3.025
FullInterlockingPlantCANPower
RobertPHeller
185.4 × 73.7 mm151 parts2LCC-BY-4.024
RP2040/RP2350Chubby hat
cyber-murmel
143.5 × 91.4 mm95 parts2LMIT22
Helper switch
30350n
15.5 × 25.8 mm7 parts2LCERN-OHL-W-2.022
TI MSP430/CCCheeseDip
upsidedownlabs
21.6 × 60 mm27 parts2LCERN-OHL-S-2.021
SC14CVMDECT Devboard Audio Header
funkeleinhorn
30 × 50 mm27 parts4LCERN-OHL-S-2.020
Battery
nzevh
222 × 24 mm47 parts4LCERN-OHL-S-2.019
AVR/ArduinoAtmega16 breakout
abzman
111.8 × 88.9 mm44 parts2LUnlicense19
Breadboard 400
tebl
81.3 × 53.3 mm44 parts2LCERN-OHL-1.219
PiPLC-HMI
Chrismettal
86.4 × 50 mm19 parts2LCC-BY-SA-4.019
Ab register
TomNisbet
102 × 96 mm60 parts2LMIT18
AVR/ArduinoM644/M1284 breakout board
maxxir
54.9 × 45 mm60 partsNo license18
STM32Fpga stm32-ifaces
azonenberg
90 × 94.5 mm267 parts6LBSD-3-Clause17
Facet breakout
xboxoneresearch
55 × 87.5 mm16 parts2LNo license17
Amiga A500 Keyboard Connector Breakout
solarmon
25.4 × 23 mm11 parts2LNo license17
SharpMemoryLcdBreakout
crehmann
14 × 42 mm9 parts2LCERN-OHL-S-2.017
Spartanmini shieldpower
jonthomasson
89 × 61 mm7 parts2LNo license17
STM32Mmdvm hs hat
taozhengbo
59.2 × 47.8 mm106 parts2LNo license16
LED Driver Board
MobiFlight
80 × 80 mm61 parts2LNo license16
TsuraraGB Programmer
rniwase
25.2 × 31 mm40 parts2LBSD-3-Clause16
AVR/ArduinoLCD HAT
bitbank2
45.7 × 53.4 mm11 parts2LApache-2.016
AVR/ArduinoArd ltc2499
IowaScaledEngineering
53.3 × 68.6 mm37 parts2LNo license15
Cartridge-Breakout-Board
Xenii1642
68 × 25 mm4 parts2LCERN-OHL-S-2.015
Raspberry PiRaspberry Pi Zero W
chukhanhhoang
65 × 30 mm52 parts2LNo license14
AVR/ArduinoArduino Shield RC Controller
michaelshiloh
135 × 100 mm21 parts2LAGPL-3.014
Browse boards by part
AMS1117-3.3 1196USBLC6-2SC6 983RP2040 699W25Q128JVS 421AP2112K-3.3 376TL072 339TL074 307ESP32-S3-WROOM-1 304CH340C 274L7805 271Pico 25174HC595 248USBLC6-2P6 248LM358 228AP2112K-3.3TRG1 205Arduino_Nano_v3.x 19774LS04 193LM7805_TO220 185ESP32-WROOM-32 18274LS245 171SRV05-4 169W25Q128JVSIQ 16974LS138 16274LS32 161