2,089 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.
C64-Pi1541-Module
tebl
65 × 56.5 mm18 parts2LNo license34
Uinio
uinika
64 × 39 mm4 parts2LNo license34- schematic only · 16 parts
Marble
BerkeleyLab
16 partsNo license34 
KS0835F Phone SLIC
GadgetReboot
71.7 × 27.7 mm14 parts2LNo license33
FPGA2019-07-06 11:52:16 fpga hat
Wren6991
65 × 56.5 mm87 parts4LApache-2.031
Teacup
HackerComputerCompany
86.2 × 56.2 mm76 parts4LGPL-2.031
Nordic nRFRoyalBlue54L-Feather
LordsBoards
58.4 × 22.9 mm48 parts8LCERN-OHL-P-2.031
ESP32USBee32-S2
dhairyashah1
28.1 × 68.3 mm47 parts2LMIT31
USB-C---MicroB
luni64
13.1 × 17.8 mm6 parts2LMIT31
Vecdec
svenscore
9.5 × 12.9 mm2 parts2LCC-BY-NC-4.031
AVR/ArduinoAvr hv2
dilshan
101.6 × 53.3 mm15 parts2LMIT30
Rfm9x breakout board
attexx
23.9 × 26 mm10 parts2LNo license30
AVR/ArduinoGrBLDC
Defdist
103.1 × 59.6 mm204 parts2LNo license29
STM32Shirley-FC-Dev-Board
Bare-Metal-Foundry
56 × 46 mm110 parts4LNo license29
TeensyFOC-Carrier
tthom289
39.2 × 52.3 mm11 parts2LMIT29
NXPTeensy eurorack
newdigate
64.8 × 109.2 mm52 parts2LMIT27
ESP8266Homeassistant automaic greenhouse
felixwittwer
162 × 60 mm20 parts2LCC-BY-NC-4.027
Pmw3610
badjeff
15.5 × 29.9 mm15 parts2LCERN-OHL-P-2.027
STM32Nuco v
dmitrystu
70 × 82.5 mm137 parts2LCERN-OHL-W-2.026
STM32MMDVM RPT Hat
mathisschmieder
65 × 56 mm103 parts2LNo license26
Lpddr4-testbed
antmicro
69.6 × 30 mm64 parts6LApache-2.026
FPGAICE40-fpga
joshajohnson
50 × 22.9 mm62 parts2LCC-BY-NC-4.026
CH330 Hardware
Jana-Marie
10 × 10 mm9 parts2LGPL-3.026
ESP32ESP32-C6-EVB DIMM Rev A
OLIMEX
100 × 70 mm109 parts2LGPL-3.025
STM32CC1200 HAT-hw
M17-Project
65.1 × 30.2 mm75 parts4LCC-BY-NC-4.025
STM32RPI5-CFE-Hat
will127534
65 × 56 mm44 parts4LMIT25
AVR/ArduinoPsxControllerShield
SukkoPera
68.6 × 53.3 mm26 parts2LCustom license25
ATF15xx-EVB
whitequark
25.4 × 50.8 mm14 parts2LCC0-1.025
FPGAM.2-FPGA-Accelerator
KaiPereira
22 × 80 mm276 parts6LNo license24
NXPLPC176x MultiFunction
RobertPHeller
156.2 × 168.9 mm223 parts2LCC-BY-4.024
Jiffy
jonasblixt
110 × 46 mm199 parts4LCC-BY-4.024
ESP32OkayCAN
jglim
64.8 × 41 mm32 parts2LMIT24
RP2040/RP2350RP2350B-Dev-Board
jvanderberg
77 × 20.8 mm99 parts4LNo license23
RP2040/RP2350Pico stretch
84.8 × 21 mm59 parts4LNo license23
ESP32Esp32-pico module
thingler
20.6 × 15.6 mm9 parts2LGPL-3.023
NXPTeensy40 Minimalist USB Host
dmadison
17.8 × 45.7 mm9 parts2LNo license23
Browse boards by part
AMS1117-3.3 899USBLC6-2SC6 763RP2040 566W25Q128JVS 345AP2112K-3.3 273TL072 269TL074 250ESP32-S3-WROOM-1 229CH340C 221L7805 208Pico 19274HC595 185USBLC6-2P6 174LM358 16874LS04 160SRV05-4 158AP2112K-3.3TRG1 154ESP32-WROOM-32 15374LS245 14474LS138 138W25Q128JVSIQ 135Arduino_Nano_v3.x 13474LS00 133TP4056 130