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.
Kicad board-2026-07-29-rpi drone hat
SimulatedFlow
65 × 56 mm5 parts4LCustom license0
SBK NFET1
sbarabe
10.7 × 9.9 mm4 parts2LCERN-OHL-P-2.00
ESP8266Twomes co2-monitor hardware
energietransitie
28 × 33 mm4 parts2LCERN-OHL-P-2.00
ESP32Feather eyespi
mikeysklar
50.8 × 27.1 mm4 parts2LGPL-3.00
AS5600-adapter
n2048-creative-technology
23 × 23 mm3 parts2LMIT0
RPi hat breakout
manhoosbilli1
65 × 56 mm3 parts2LNo license0
ESP32Feather sdio
51 × 23.3 mm3 parts2LGPL-3.00
EEPROM programmer
Alireza2317
40.4 × 52.8 mm3 parts2LCC0-1.00
5mm08 2p for breadboard
asukiaaa
9.8 × 9.4 mm2 parts2LNo license0
RPi Hat Template
CameronBrooks11
65 × 56.5 mm2 parts2LMIT0
Raspberry pi hat gate control isolated
65 × 56 mm1 parts2LNo license0
Pi-Zero-2W-MANET-HAT
JCrossTX
65 × 30 mm0 parts2LNo license0
Asic reticulum
gmlewis
65 × 56 mm0 parts2LMIT0
Circular led breakout
184 × 184 mm0 parts2LNo license0- schematic only · 49 parts
4BitCPU
DylanMcKaige
49 partsNo license0 - schematic only · 46 partsESP32
Rgb led audio
matthieupoupin3704-alt
46 partsNo license0 - schematic only · 43 partsESP32
Adaptative-Traffic-System
djangmahprince
43 partsNo license0 - schematic only · 42 partsNordic nRF
ECG ble project
Bangminseok
42 partsNo license0 - schematic only · 36 partsAVR/Arduino
Breadboard-Power-Supply
leboeuf-dup
36 parts2LNo license0 - schematic only · 31 parts
Radar xm125
kanha2907
31 partsNo license0 - schematic only · 23 partsPIC
PIC16F1619-Custom-Development-Board
AKtronics
23 partsNo license0 - schematic only · 23 partsESP32
Drone-Controller
Hardy2008
23 partsNo license0 - schematic only · 22 parts
Overdrive-Guitar-Pedal
minjii1079
22 partsNo license0 - schematic only · 20 partsESP32
Desk balance
kurikennn
20 partsMIT0 - schematic only · 18 parts
Enhanced edr
kartiknagare33
18 partsMIT0 - schematic only · 12 parts
HandFanv1
Chronos-03
12 partsNo license0 - schematic only · 9 parts
KICAD onboarding devboard
jortmana
9 partsNo license0 - schematic only · 9 parts
Pcb crossing optimizer
ashergarland
9 partsNo license0 - schematic only · 5 partsESP32
Flappy-Bird on a-ESP32-Microcontroller
bubble34019
5 partsNo license0 - schematic only · 1 partsSTM32
Stm32g4-automotive devboard
phoenix-prog
1 partsMIT0 - schematic only · 1 partsESP32
Kicad mcp
tomyrese
1 partsNo license0 
AVR/ArduinoEasyduino Atmega
Hanqaqa
68.8 × 53.6 mm35 parts4LCERN-OHL-P-2.0746
Radioberry preamp
pa3gsb
65 × 56 mm137 parts2LNo license675
Breakout board
Luos-io
26.7 × 27.9 mm29 parts2LMIT547
ESP8266RatGDO-OpenSource-Bare-ESP8266
Kaldek
55 × 82.7 mm20 parts2LMIT506
ESP32
Chrismettal
66.4 × 48.1 mm20 parts2LCC-BY-SA-4.0446
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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