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.
Igloo64 Prototyping Board
anachrocomputer
96.5 × 90.2 mm28 parts2LNo license0
AVB-Eurorack
scrambletools
84.7 × 30 mm28 parts2LNo license0
Suzibot
coddingtonbear
74.5 × 51.6 mm27 partsNo license0
AVR/ArduinoOctoboard
hhhug000
45 × 74.5 mm27 parts2LApache-2.00
Tda2050-dev
gmazzucchi
81.3 × 80.6 mm27 parts2LNo license0
STM32Stm32f103-usb devboard
Wiki1998-dev
36.3 × 38.2 mm27 parts2LMIT0
STM32Fmc memory adapter
FlorianFrank
200.1 × 170.2 mm27 parts4LApache-2.00
STM32Stm32f103-usb devboard
Waqar-98
36.3 × 38.2 mm27 parts2LMIT0
I2c signal isolator
juarendra
48 × 32.4 mm27 parts2LNo license0
ESP32ESP32-S3-SMALL
AMIFEX-IT
45 × 45 mm27 parts4LMIT0
ESP32RubberESP32-S3
aviyanp
50 × 50 mm26 parts4LNo license0
Guitardawliteos
ArdChoille637
21 × 47.4 mm26 parts2LNo license0
AVR/ArduinoATmega328p microcontroller board
Abhi90808
50.7 × 21.5 mm26 parts2LNo license0
ESP32ESP32-Breadboard-Devboard
mgollapudi104
21 × 73 mm25 parts2LNo license0
Mcp breadboard
HarkonenBade
48.3 × 35.6 mm25 parts2LMIT0
Kicad board-2026-07-16-bluepill smartnode rs485
SimulatedFlow
100 × 80 mm25 parts4LCustom license0
AVR/ArduinoMcu datalogger
Iamshubham3
48.6 × 34.8 mm25 parts4LNo license0
HALPI2-HDMI-FPC
hatlabs
54 × 47.1 mm24 parts2LNo license0
AVR/ArduinoATmega328P-Minimal-Development-Board
moaazzz-h
82.9 × 62.9 mm24 parts2LMIT0
ESP32Custompcbwatch
AryanMP07
56 × 74.5 mm24 parts2LNo license0
RP2040/RP2350TRIO-Rp2040
shourya2007mittal-hub
26.4 × 23.6 mm24 parts2LNo license0
EQUALITY-BREADBOARD
aoishik
100 × 100 mm24 parts2LNo license0
Boardoza Analog To PWM Converter Breakout Board
Boardoza
40 × 20 mm24 parts2LCC-BY-SA-4.00
AVR/Arduino2020 2021 LIEW ZHOU
MOSH-Insa-Toulouse
68.6 × 53.3 mm24 parts2LMIT0
ESP32Smart projector remote
benceharomi
30 × 60 mm24 parts2LMIT0
Rv1106g2-breakout
tscircuit
100 × 72 mm24 parts4LNo license0
Rv1106g2
100 × 72 mm24 parts4LNo license0
Primercarrier
Jameswill-Winsock
93.2 × 57.7 mm24 parts2LGPL-3.00
AVR/ArduinoArduino music box
hschwar2
103.5 × 87 mm24 parts2LNo license0
Koyomi lvds hat
TensorFleet
65 × 28.3 mm23 parts4LCERN-OHL-S-2.00
Boardoza GP8403 Dual Channel I2C DAC Breakout Board
40 × 20 mm23 parts2LCC-BY-SA-4.00
RP2040/RP2350CM2040
Yarnemeuris
40 × 30 mm23 parts2LNo license0
AVR/ArduinoATTinyX14-development board
jenschr
39.4 × 16.2 mm23 parts2LMIT0
AVR/Arduino2021-2022 Viallaneix Sottas Noual
76.2 × 61 mm22 parts2LNo license0
Starboard
Asurant
38.5 × 48.5 mm22 parts4LNo license0
STM32Pcbdesign
enishyseni
55 × 40 mm22 parts4LNo license0
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