Open source PCB designs you can simulate
6,828 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.
ESP32Sra dev board 2026
SRA-VJTI
90.2 × 90 mm145 parts2LMIT80
ESP32Lumenlab
ericmcdaniel
99.9 × 80 mm72 parts4LMIT3
ESP32PCB Watersysteem
Vertical-Farming-IB3
89.3 × 100 mm88 parts2LNo license2
ESP32PGR
Projeto-Guarda-Rios
67.5 × 44.4 mm75 parts4LMIT2
ESP32Home weather station esp32
Norbixix
60 × 33.5 mm44 parts4LNo license2
ESP32OmniDrive
TLNKhanh
45 × 59.5 mm66 parts2LMIT1
ESP32Twomes p1-gateway hardware
energietransitie
35.6 × 79 mm33 parts2LCERN-OHL-P-2.01
ESP32Weather station
ismangoman
36 × 49.8 mm14 parts2LMIT1
ESP32Drone ESP32
Asaf66
102.9 × 103.7 mm73 parts2LNo license0
ESP32Isc motorbeep
ISC-HEI
70 × 50 mm69 parts4LNo license0
ESP32Esp32-bluetooth erm accel dongle faulty
manhoosbilli1
23.3 × 28.4 mm50 parts4LNo license0
ESP32Pcb cat toy
hari-ghatpande
65 × 66.9 mm43 parts2LNo license0
ESP32Fluxguard
lizuyi-6
52 × 29 mm34 parts4LNo license0
ESP32Teknofest-Drone-AramaKurtarma
alikerem120215
75 × 50 mm17 parts2LNo license0- schematic only · 11 partsESP32
LIM-Vario
loyermael
11 partsGPL-3.00 
ESP32Lsa
61.9 × 24.2 mm16 parts2LMIT80
ESP32TeamPlantenbak
49.9 × 72.7 mm60 parts2LNo license2
ESP32USB to Serial Converter
mauroxf
25 × 40 mm11 parts2LMIT1
ESP32ESP8266
agkaminski
20.3 × 25.7 mm18 parts2LCC-BY-NC-4.00
ESP32ESP8266
20.3 × 25.7 mm18 parts2LCC-BY-NC-4.00
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?
6,828 boards from 3,344 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.