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.
Bread board power supply
stephen-j8
32.3 × 53.6 mm17 parts2LMIT0
Breadboard-Power-Supply
Tirthkush
28.5 × 54.5 mm17 parts2LNo license0
AVR/ArduinoChouvet Laffosse Gas Sensor
MOSH-Insa-Toulouse
68.6 × 53.3 mm17 parts2LNo license0
Breadboard power supply
Mithun-68
30.5 × 53.1 mm17 parts2LNo license0
Breadboard-Power-Supply
BrijModi
29.2 × 52.6 mm17 parts2LNo license0
Tr1ckler
3HMonkey
135 × 130 mm17 parts2LMIT0
Breadbord power supply
chopda15
35.1 × 52.5 mm17 parts2LNo license0
Breadboard-Power-Supply
Ziegen-EE
30.2 × 52.8 mm17 parts2LMIT0
Breadboard-Power-Supply
anasarif23
34.8 × 52.3 mm17 parts2LNo license0
CoreElectronics-GlowBit-Rainbow
CoreElectronics
76.2 × 42.7 mm17 parts2LMIT0
ESP8266DIY-Sonoff
LoZioo
59.2 × 42.9 mm16 parts2LMIT0
ESP32Esp32-sensor daq
EldinLz
73.5 × 65.5 mm16 parts2LNo license0
AVR/Arduino2020 2021-Demo4all
68.6 × 53.3 mm16 parts2LMIT0
Kicad board-2026-07-16-bluepill relay carrier-2ch
SimulatedFlow
100 × 80 mm16 parts4LCustom license0
PicoPowerManagement
Fortinbra
32.6 × 25 mm16 parts4LMIT0
Boardoza BMI088 6-Axis IMU Breakout Board
Boardoza
40 × 20 mm16 parts2LCC-BY-SA-4.00
Kicad board-2026-07-28-arduinounoprotoshield
68.6 × 53.3 mm15 parts4LCustom license0
AVR/ArduinoCmote
Person-0
21.2 × 30.6 mm15 parts4LNo license0
Tps63070-3v3-dev board
eshelton328
24.7 × 22.9 mm15 parts2LNo license0
AVR/ArduinoAVR ATmega328P PCB Task01
DhruvBalsara
112.5 × 70 mm15 parts2LNo license0
AVR/ArduinoArduCore-Custom-Arduino-Board
urjadoshi2024etc-creator
52 × 57.5 mm15 parts2LCustom license0
AVR/ArduinoGaz Sensor Arduino Shield
68.6 × 53.3 mm14 parts2LNo license0
Bibby
austingrossman
65 × 56 mm14 parts2LCustom license0
Pi zero weather hat circuit
irpl
65 × 30 mm14 parts2LNo license0
PICPIC32-Breakout-Board
finnhittson
15.6 × 31.3 mm14 parts4LNo license0
WCH CH32/CH55xMini devboard
FraI3mega
19 × 56.4 mm14 parts2LCERN-OHL-W-2.00
E80-900M2213S SE050 Breakout
cvaldess
68.9 × 51.8 mm14 parts2LGPL-3.00
SBK SP1
sbarabe
15.8 × 11.1 mm13 parts2LCERN-OHL-P-2.00
ESP32Devkit2
jacobjuneau6
40.8 × 80 mm13 parts2LMIT0
QuadMotorHAT
itsjeanxx12
65 × 56 mm13 parts2LMIT0
Raspberry PiDog dev
PT233
71 × 56 mm13 parts2LNo license0
RISC-VPlex-Console-Stage-1
itsThatCoderBoy
46.3 × 54 mm13 parts2LUnlicense0
Maze Solver Shield VSDSquadron
brijeshahirwar100
57.9 × 29.5 mm13 parts4LNo license0
BMI088-BOB
mwfraczek
30 × 30 mm13 parts2LNo license0
Gameboy camera printer shield
trickart
97.8 × 53.3 mm13 parts2LNo license0
Embedded assignment
Bharath-Kumar001
24.2 × 22.5 mm12 parts2LNo 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