Open source PCB designs you can simulate
7,464 boards
Every public KiCad project we can find on GitHub, with its processor, full parts list and a render of the board. Any of them can be brought up in simulation: open one and run firmware on it before you order a single PCB.
ESP32Badge
atopile
56.3 × 39 mm239 parts4LMIT4.0k
ESP32SmartSPin2k
doudar
57.2 × 60.3 mm79 parts2LGPL-2.0283
ESP32Communicator
Hack-a-Day
148 × 81 mm47 parts2LMIT101
ESP32Nsec badge-2025
nsec
89 × 123.4 mm80 parts2LMIT61
ESP32Badge2017
cryptovillage
95.2 × 154.5 mm129 parts2LNo license31
ESP32Oniondao badge
OnionDAO-git
76.6 × 141.1 mm116 parts2LNo license16
ESP32WebScreen
HW-Lab-Hardware-Design-Agency
60.6 × 27.6 mm76 parts4LCERN-OHL-P-2.013
ESP32Defcon32 badge
thehackbat
60 × 100 mm36 parts2LGPL-3.013
ESP32Obsidian Boa
silvioviscuso
35.6 × 17.8 mm71 parts4LNo license10
ESP32Synchronisation-Wand
YuxuanHan0326
80 × 35 mm90 parts4LApache-2.06
ESP32WeatherV3-kernelcon2026
ZonkSec
66 × 143.3 mm82 parts2LNo license4
ESP32Wulpus pro max
Sergio5714
39 × 21 mm44 parts4LNo license4
ESP32Launch-Party-Badge-Software
poorawsanhsirk
178 × 110 mm404 parts4LNo license3
ESP32DC-34-Badge
Cyber-Professionals-Enthusiast-Club
145.2 × 203.4 mm87 parts2LNo license3
ESP32OSCD Demo
tmjnijssen
94.6 × 94.6 mm76 parts4LCERN-OHL-P-2.03
ESP32PCB Fallout
Pegoku
35.5 × 45.8 mm28 parts2LNo license3
ESP32Kompic Mk1b
porupski
44.5 × 50.6 mm121 parts4LGPL-3.02
ESP32Solana badge
spacemandev-git
77.6 × 116.3 mm81 parts2LNo license2
ESP32Hardware-TUDCTF2025
Emway79
49.5 × 57.7 mm56 parts2LCC-BY-SA-4.02
ESP32Aegis hack the badge
dkuaegis
84 × 100 mm29 parts2LNo license2
ESP32Why2025
ranzbak
114.9 × 129.9 mm327 parts4LNo license1
ESP32Edge-AI-Badge Main
LyndLabs
78 × 78 mm111 parts2LNo license1
ESP32Mood-Display
Axe-1st
70.2 × 70.2 mm54 parts2LNo license1
ESP32Cyberwatch
ttankbuster
37.5 × 45.5 mm32 parts2LMIT1
ESP32Smart-Gloves
Adnanosman9
38.5 × 34.5 mm16 parts2LMIT1
ESP32Signal compass
kaizenapps
65 × 65 mm8 parts4LGPL-3.01
ESP32XIAO ESP32S3 V1.5
ArticunoFruna
17.8 × 21.1 mm70 parts4LNo license0
ESP32NeuralCard
Brillar0101
85.6 × 54 mm66 parts2LCERN-OHL-P-2.00
ESP32Kicad agent suite
11cookies11
196 × 182 mm62 parts2LMIT0
ESP32Goofy ahh epaper watch
haohaohaoyan
66 × 36 mm50 parts2LNo license0
ESP32Communicator
grinchdubs
148 × 81 mm47 parts2LNo license0
ESP32Communicator
hexan86
148 × 81 mm47 parts2LMIT0
ESP32WebShooter
8aChristian
38 × 38 mm6 parts2LMIT0
ESP32SmartSPin2k
189.5 × 204.9 mm79 parts2LGPL-2.0283
ESP32Front
148 × 81 mm7 parts2LMIT101
ESP32Nsec badge-2025-panel
197 × 249.7 mm80 parts2LMIT61
About these open source PCB designs
Every board here is a published hardware project: a public GitHub repository with KiCad design files and a bill of materials. HardLabs reads those files directly — the board outline for its size, the copper layers, every footprint for the parts list — and draws the render from the layout itself, so what you see is the design as committed rather than a product photo.
Boards are indexed by the microcontroller they are built around, by what they are for, and by every IC and module on them. That makes the gallery a quick way to find a reference design: look up a part number to see how other engineers power, decouple and connect it.
Using an open source board as a reference design
- Find boards built on your chip or with the part you are designing around.
- Compare their size, layer count and bill of materials, and open the KiCad files on GitHub.
- Check the license before reusing any of the design.
- Simulate the firmware on HardLabs to test your changes before you order a PCB.
Open source PCB designs: common questions
What is an open source PCB?
A printed circuit board whose design files — schematic, layout and bill of materials — are published for anyone to study and, depending on the license, to modify and manufacture.
Are these PCB designs free to use?
It depends on each project's license. Open hardware licenses such as CERN-OHL and CC BY-SA, and software licenses such as MIT, allow reuse on their terms; a repository with no license keeps all rights with its author. Every board page shows its license.
What design files do the boards come with?
They are KiCad projects: the .kicad_pcb layout and the schematic (or a netlist from older KiCad versions), plus a bill of materials, usually a CSV. Each board page links to those files in the original GitHub repository.
How do I find boards that use a specific part?
Search for the part number, or open the part's page from the list of parts. It shows every board built with that part and the parts most often used alongside it.
How many boards are there, and how often is the list updated?
7,464 boards from 3,597 repositories today. New projects are found and added every night.
Can I test a board's firmware before ordering the PCB?
Yes. HardLabs builds a simulation of a board from its netlist and BOM, so you can boot and debug firmware against it with no hardware on your desk.