Open source PCB designs you can simulate
20,833 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.
ESP32Esp rust board
esp-rs
22.9 × 63.5 mm48 parts2LNo license647
ESP32Pcb designer ai agent
assalas
40 × 30 mm17 parts2LMIT127
ESP32ICE-V-Wireless
ICE-V-Wireless
81.7 × 31.8 mm78 parts4LMIT82
ESP32Blinkekatze
TobleMiner
83 × 83 mm106 parts4LNo license33
ESP32FunHomeSwitch
ZhiFun
27.5 × 32 mm42 parts2LMIT29
ESP32Esp32-recirc pump controller
pdw-mb
43.6 × 43.6 mm32 parts2LNo license17
ESP32Paperflux
albanpetit
33.5 × 50 mm43 parts4LNo license10
ESP32ESP32-C3-DevKit-RUST-1
swayerloren
22.9 × 63.5 mm48 parts2LMIT8
ESP32ESP32-H2-MINI-1
74th
50.3 × 60.4 mm46 parts2LMIT8
ESP32Esptemp8c
gcormier
56.6 × 57.7 mm38 parts2LNo license8
ESP32Mbadge25
Makerville
46 × 46 mm33 parts2LCERN-OHL-P-2.06
ESP32Plc board
denorath-sys
100 × 80 mm62 parts4LCERN-OHL-W-2.05
ESP32SlimeVR-Tracker-HW
xuan25
30 × 30 mm45 parts2LMIT5
ESP32ESP32-C3-DevKit-RUST-1
xutianq999
22.9 × 63.5 mm48 parts2LCERN-OHL-P-2.04
ESP32OSCD Demo
tmjnijssen
94.6 × 94.6 mm76 parts4LCERN-OHL-P-2.03
ESP32Network player
naguirre
30.1 × 66.6 mm72 parts4LMIT3- schematic only · 5 partsESP32
Schem
Raf3-Tech
5 partsNo license2 
ESP32Imu midi controller
fouiorqwe
25 × 40 mm19 parts2LMIT1
ESP32Rainbow music pegasus
adamm
151 × 31 mm96 parts2LApache-2.00
ESP32Digital-B-Card
AhmedMKAlzoubi
100 × 60 mm62 parts2LNo license0
ESP32ESP32-C3-DevKit-RUST-1
florentdenis
50.8 × 33 mm58 parts2LCustom license0
ESP32DC710 - The Radio Bomber
jeremylaratro
200 × 77.1 mm56 parts2LNo license0
ESP32Digital-ID-Card-V1
Malch2089
54 × 86 mm16 parts2LNo license0
ESP32ESP32-Writer
54.6 × 31.1 mm29 parts2LMIT8
ESP32MPPT 2420 HC
PawelSroczynski
100 × 100 mm140 partsGPL-3.00
ESP32Main Board
jayalcock
55.4 × 54.6 mm64 parts2LNo license0
ESP32Foxhunt badgecopy
200 × 80 mm56 parts2LNo license0
ESP32ESP32-Write-CH9102F
34.3 × 19.5 mm25 parts2LMIT8
ESP32Ozinverter
99.8 × 99.8 mm83 parts2LGPL-3.00
ESP32ESP32C3DevBoard
25.4 × 29.2 mm24 parts2LMIT8- schematic only · 29 partsESP32
LED chaser
29 parts2LCERN-OHL-P-2.03 
ESP32Integrated circuits
LilyTronics
70 × 79 mm35 parts2LGPL-3.02
ESP32ESP32-C3-MINI-1
20.3 × 46.4 mm22 parts2LMIT8
ESP32ESP32-C6-WROOM-1 Dev Board
25.4 × 36.8 mm22 parts2LMIT8
ESP32ESP32-C3-MINI-1-panelized
20.3 × 31.1 mm21 parts2LMIT8
ESP32ESP32-WROOM-32
25.4 × 34.3 mm21 parts2LMIT8
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?
20,833 boards from 10,409 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.