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.
STM32STM32 Breakout
queens-satellite-team
95 × 95 mm108 parts4LNo license1
ESP32ESP32-WROOM-32E + CC1101 Multiband
bdini13
90 × 36 mm105 parts4LCustom license1
STM32Mini v0.3
northernpaws
20 × 40 mm94 parts8LCERN-OHL-S-2.01
Caravel Nucleo
chipfoundry
68.1 × 92.5 mm89 parts2LNo license1
Sky130nm NFC
morzack
50 × 52 mm83 parts4LNo license1
8 Relay Board panelized
sparkfunX
189.5 × 184.4 mm76 parts4LMIT1
ESP32HoloCade Universal Shield
scifiuiguy
118 × 84.5 mm71 parts2LMIT1
NXPNuclone LPC845M301BD48 small
Squantor
50 × 50 mm67 parts2LMIT1
RP2040/RP2350ADC and amplifier pico breakout board
Jolt8
55 × 80.5 mm66 parts4LNo license1
Pi hat ups
Doenec
65 × 56 mm62 parts4LMIT1
Giga shield v04 manualseed
ajokela
155 × 90 mm60 parts2LBSD-3-Clause1
STM32TITAN Board
hpvdt
65 × 56 mm58 parts2LNo license1
AVR/ArduinoShield
ksmonkey123
52.7 × 53.3 mm57 parts2LMIT1
Softgalaxy Pi HAT 2v0
hsclouds
69.1 × 60.8 mm57 parts2LNo license1
Asservissement Shield
robotronik
84 × 68.4 mm49 parts2LNo license1
PICBreakable Board
ElektroNeo
76.2 × 99.1 mm45 parts2LNo license1
KakuteHAT v2
stephendade
65 × 56 mm44 parts2LGPL-3.01
Nordic nRFNrf52 rev1
xil-se
48.3 × 48.3 mm42 parts2LNo license1
Ethernet HAT
andrew153d
42 × 42 mm40 parts4LNo license1
RP2040/RP2350Msxnano board8020
Papipapito
85 × 56 mm39 parts4LNo license1
Es8388-breakout
yry-dev
24.5 × 25 mm36 parts2LMIT1
Control panel
jevans3142
69.9 × 67.3 mm35 parts2LNo license1
AVR/ArduinoGNSS GPS L86-M33 breakout with easyC panel
SolderedElectronics
162 × 164 mm31 parts2LTAPR-OHL-1.01
Accelerometer & Gyroscope & Magnetometer LSM9DS1TR breakout
22 × 38 mm30 parts2LTAPR-OHL-1.01
SPI Unit
oberrow
96 × 70 mm29 parts4LMIT1
NXPIsmd fc sensortest
EmmardFr
102.7 × 40 mm28 parts2LMIT1
Microchip SAMSAMD21E18 LilyPad Sticker: Enjoy Hack Club
Hugoyhu
73.2 × 38.8 mm27 parts2LMIT1
AVR/ArduinoLocoNet Shield
acwright
55 × 55 mm26 parts2LMIT1
LED Bar - 16P
michaelkamprath
12.5 × 47.5 mm19 parts2LCC0-1.01
Esp32-c6-carrier
paulmikael02
68 × 51 mm18 parts2LNo license1
ESP32Devboard
Soraxem
26.4 × 41.7 mm18 parts2LCERN-OHL-P-2.01
LVDS SMA Adapter
oxidecomputer
53.3 × 31.8 mm15 parts4LMPL-2.01
Rs485-breakout
shinyblink
76.2 × 50.8 mm14 parts2LISC1
AVR/ArduinoHall effect sensor analog easyC
22 × 22 mm12 parts2LTAPR-OHL-1.01
AVR/ArduinoHall effect sensor digital easyC
22 × 22 mm12 parts2LTAPR-OHL-1.01
MQ Breakout
CaptainOrangeSparrow
22 × 38 mm12 parts2LNo license1
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