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.
Starboard
Asurant
38.5 × 48.5 mm22 parts4LNo license0
AVR/Arduino2021-2022 Viallaneix Sottas Noual
MOSH-Insa-Toulouse
76.2 × 61 mm22 parts2LNo license0
ESP32ESP32-Prototyping-Breakout
Nisarg-Vyas
87.6 × 70 mm21 parts2LMIT0
NXPGuepard one
IlyaasAitSimmou
85 × 85 mm21 parts4LNo license0
LED-RPi
AugustoS97
58.8 × 44.1 mm21 parts2LGPL-3.00
STM32STM32F103-dev board
Kraad25
38 × 38 mm21 parts2LNo license0
74HC18
baleshwarece-jpg
51.5 × 30 mm21 parts2LNo license0
Kicad board-2026-07-18-bluepill relay carrier
SimulatedFlow
80 × 70 mm21 parts4LCustom license0
Smart greenhouse controller-
asdaf77
68 × 53 mm21 parts2LNo license0
STM32 shield
mnk
52 × 53 mm21 parts2LNo license0
4GP-23 24-Briens Charnay
79.3 × 67.7 mm21 parts2LNo license0
AVR/ArduinoAlami Powar Gas Sensor Shield
68.6 × 53.3 mm21 parts2LNo license0
ESP32C3-pico
FrancoSpitale
28.4 × 51.5 mm21 parts2LMIT0
Pystem mini bot
ThriftyPiano
48 × 33 mm21 parts2LMIT0
Rpi-9v psu hat
ssosik
41.9 × 55.9 mm20 parts2LNo license0
ESP32NOVA-S3
fubiniricci
40 × 30 mm20 parts2LMIT0
Devkyt
Lattrex
141 × 93 mm20 parts4LNo license0
RP2040/RP2350Hackpad
sharkie-0000
115.5 × 73 mm20 parts2LNo license0
Phoque-PowerShield
Moddingear
50 × 50 mm20 parts2LUnlicense0
PICDspic30f devboard kit
Esdras2
95.5 × 57 mm20 parts2LMIT0
STM32Open pod
Leo-Nicolle
65 × 90 mm20 parts2LNo license0
STM32Bugboard mini
NeerajR18
20 × 25 mm20 parts2LNo license0
ESP32CNC ESP32
IagoAbreu-Core
63.8 × 95.8 mm19 parts2LNo license0
Boardoza MCP73831 Lithium Battery Charger Breakout Board
Boardoza
40 × 20 mm19 parts2LCC-BY-SA-4.00
ESP8266Iot sensor node
DestinyU7
68.6 × 53.3 mm19 parts2LNo license0
RP2040/RP2350Slice STPC
feastorg
100 × 145 mm19 parts4LGPL-3.00
Breadboard-Power-Supply-Module
kripamaurya
53.5 × 31 mm19 parts2LNo license0
MyTtiny
patriq128
29.7 × 17 mm19 parts2LMIT0
AVR/ArduinoKlask
motty-mio2
69.1 × 53.8 mm18 parts2LCC-BY-SA-4.00
ESP32Kbdrelay
mdthorpe
88 × 55 mm18 parts2LNo license0
Pwm breakout phat
asssaf
65 × 30 mm18 parts2LNo license0
ESP32Hidden Headphones Carrier Board v4
jrydin01
55 × 29.5 mm18 parts2LCC0-1.00
Can nano shield
50 × 18 mm18 parts2LGPL-3.00
RAK4630-Dev-Board
Tomas-Kuchta-FPV
50 × 52 mm18 parts2LCERN-OHL-W-2.00
Hex48
anachrocomputer
77.9 × 90 mm18 parts2LNo license0
Arduino icsp shield
mprosk
53.3 × 68.6 mm18 parts2LMIT0
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