2,160 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.
NXPTeensy40 Minimalist USB Host
dmadison
17.8 × 45.7 mm9 parts2LNo license23
Paw3222
badjeff
7.8 × 12.5 mm7 parts2LNo license23
Hc245t bypass esd panel
cyber-murmel
466 × 8 mm405 parts2LMIT22
Spark inducer
30350n
233.3 × 128.5 mm104 parts2LCERN-OHL-W-2.022
ESP32Fujinet devkit shield
djtersteegc
99.1 × 55.9 mm40 parts2LCERN-OHL-S-2.022
Nordic nRFByrandev
byrantech
35.9 × 41.8 mm55 parts2LMIT21
ESP32ESP32-Development-Board
jminjares4
28.5 × 53.7 mm36 parts2LNo license21
TI MSP430/CCMSP430 Breadstick - Apple Sauce
upsidedownlabs
18.5 × 65.8 mm31 parts2LCERN-OHL-S-2.021
FPGAPi5-Artix-FPGA-Hat
m1geo
65 × 56 mm153 parts4LMIT20
AVR/ArduinoZmk uno
zmkfirmware
68.6 × 53.3 mm74 parts2LCERN-OHL-W-2.020
ESP32HomeKey-ESP32
lollokara
41.6 × 47.3 mm69 parts2LNo license20
STM32Stm32....c breakout
electroniceel
25.4 × 50.8 mm59 parts2LCC-BY-4.020
SC14CVMDECT DEVBOARD
funkeleinhorn
80 × 90 mm29 parts4LCERN-OHL-S-2.020
SFP Plug Breakout
mwrnd
79.3 × 17 mm16 parts4LBSD-2-Clause20
ESP32ESP32-C3-DevBoard
21km43
25.4 × 26 mm15 parts2LNo license20
MiSTer SNAC2IEC
venice1200
50 × 36 mm10 parts2LGPL-3.020
STM32Barebones
nzevh
354 × 150 mm1026 parts8LCERN-OHL-S-2.019
PiPLC-Mainboard
Chrismettal
158 × 85 mm144 parts2LCC-BY-SA-4.019
AVR/ArduinoI2S-Hat
raptorlightning
65 × 56 mm94 parts4LGPL-3.019
Breadboard 830
tebl
165.1 × 53.3 mm91 parts2LCERN-OHL-1.219
STM32Perdican
Gabouin
37.1 × 39.5 mm35 parts2LMIT19
AcCCS
IdahoLabResearch
172.1 × 143.5 mm106 parts2LMIT18
ESP32Open-ESPilot
Tomas-Kuchta-FPV
50.6 × 71.1 mm98 parts2LCERN-OHL-W-2.018
NQSAP-PCB Program Counter and Stack Pointer
TomNisbet
102 × 96 mm65 parts2LMIT18
AVR/ArduinoM644/M1284 breakout (Eagle 6.5 exported)
maxxir
54.9 × 45 mm62 partsNo license18
BreadBin
c0pperdragon
320 × 134.6 mm45 parts2LNo license18
STM32Sduino uno
roybaer
68.6 × 53.3 mm45 parts2LNo license18
ESP32ESP32Marauder NetNinja
bpmcircuits
78.5 × 20.1 mm45 parts2LMIT18
STM32Iceskate
icerink
23.6 × 57.7 mm37 parts2LCERN-OHL-1.218
STM32Stm32-devboard
devnithw
37 × 32.8 mm28 parts2LNo license18
WCH CH32/CH55xCh552g dev board
blueOkiris
55.9 × 50.8 mm9 parts2LGPL-3.018
STM32Kup lulz
azonenberg
154.5 × 137 mm376 parts4LBSD-3-Clause17
Spartan6Dev
jonthomasson
89 × 61 mm180 parts4LNo license17
RP2040/RP2350MiSTle - GW3A LV20 LQ144 Development Board
MiSTle-Dev
110 × 67 mm167 parts2LNo license17
STM32ASPECT2
xboxoneresearch
60 × 60 mm116 parts4LNo license17
DB2.x-Hardware
Plastic-Scanner
40 × 40 mm49 parts2LCERN-OHL-S-2.017
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