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.
ESP32Ei O T
mayermakes
44.6 × 105.4 mm14 parts2LGPL-3.08
RP2040/RP2350Pi pico shield
Infecta
55 × 80 mm13 parts2LNo license8
STM32Nrf24stm8l
TG9541
17.8 × 29.2 mm11 parts2LMIT8
Pcb cc26x2r1-hat
klein0r
59.7 × 52.3 mm6 parts2LMIT8
FeatherWing
jenschr
50.8 × 22.9 mm2 parts2LMIT8
STM32Stm32mp1-custom devboard
voloviq
120 × 80.6 mm194 parts4LNo license7
Temp
ka6s
170.2 × 135.1 mm146 parts4LCustom license7
Pocket bob
mwelling
104.1 × 58.4 mm127 parts2LNo license7
Nordic nRFTympan Rev F
Tympan
38 × 74 mm86 parts4LCERN-OHL-P-2.07
STM32Hackboard
AdamTuraj
101 × 53.3 mm60 parts4LGPL-3.07
Rx02-emulator mega shield
djtersteegc
99.1 × 71.1 mm57 parts2LMIT7
RPi pHat-Thermocouple
mikelawrence
65 × 30 mm54 parts2LMIT7
AVR/ArduinoMyTrackr
SukkoPera
50 × 50 mm39 parts2LNo license7
STM32Infrared gun
souptik-samanta
36 × 40 mm38 parts2LNo license7
AVR/ArduinoUsbkbdshield vt100
ryu10
68.6 × 53.2 mm29 parts2LNo license7
ESP32Esp32stack
asukiaaa
3.2 × 3.2 mm27 parts2LNo license7
UsbaCarrierMM8108
JeffersonSchostakovich
31 × 17 mm23 parts2LNo license7
ESP32ESP32 Dev Board
ProZSolutions
50 × 35 mm13 parts2LGPL-3.07
Air quality sensor-MQ135-breakout hardware design
SolderedElectronics
22 × 38 mm12 parts2LTAPR-OHL-1.07
W25Q-BRD
red-scorp
16 × 23 mm9 parts2LNo license7
Cd changer emulator
akreager
22 × 80 mm5 parts2LMIT7
SideBBForM5Stack
100 × 50 mm4 parts2LNo license7
USB-C breakout
22 × 22 mm4 parts2LTAPR-OHL-1.07
Kicad template arduino nano shield
joustava
45.7 × 18 mm2 parts2LMIT7
EcholinkPi
antonjan
85 × 56 mm2 parts2LNo license7
Rfid breakout
StarGate01
39 × 39 mm2 parts2LMIT7- schematic only · 1 parts
Knot hardware pcbs
CESARBR
1 partsBSD-2-Clause7 
AVR/ArduinoLargeWordClock
LikeClockwork
398.2 × 398.2 mm579 parts2LMIT6
RP2040/RP2350Z80DevBoard
gianluca-rainis
219 × 108.5 mm179 parts4LCERN-OHL-S-2.06
FPGAIcepool board
jkiv
140 × 58 mm116 parts4LCC-BY-NC-4.06
STM32Usb proto
brainsmoke
77 × 47 mm80 parts2LCC-BY-4.06
MC5000 DevKit
RickP
100 × 97.5 mm77 parts2LGPL-3.06
Thumbee
fifteenhex
38 × 38 mm65 parts2LGPL-3.06
Klipper-Fan-Hat
mikepthomas
65 × 56.5 mm59 parts2LGPL-3.06
QSFP Breakout
mwrnd
70 × 47.5 mm54 parts4LBSD-2-Clause6
Voctoknopf1
benjaminwand
161.3 × 88.5 mm44 parts2LNo license6
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