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.
ESP32Open-ESPilot
Tomas-Kuchta-FPV
50.6 × 71.1 mm98 parts2LCERN-OHL-W-2.018
ESP32Cinread-IT8951 S3 HAT
martinberlin
83.2 × 42.1 mm54 parts2LCERN-OHL-W-2.012
ESP32Chatgpt astra test2
fredriknk
100 × 80 mm90 parts4LMIT3
ESP32Esp32Tap - ESP32-S3 Precor serial bus tap
scottmsilver
95 × 58 mm76 parts4LNo license2
ESP32Esp32s3-plant monitor
MuffinByteLabs
62.5 × 44.5 mm51 parts4LCERN-OHL-P-2.02- schematic only · 40 partsESP32
Moto Audio
bacnbit
40 partsNo license2 
ESP32SnakeTank
vpolda
80.8 × 37.1 mm46 parts4LNo license1
ESP32Nescart
Keitark
99.7 × 63.9 mm84 parts6LMIT0
ESP32Quake sensor
ismailcelik-tr
65 × 58 mm54 parts2LNo license0
ESP32Race tracker
jonaschramm
56.1 × 65.5 mm49 parts4LNo license0
ESP32GlucoBit
jdharcourt
55 × 30.4 mm43 parts4LNo license0
ESP32SmartWateringFlowerPot
Chrissyuh
61.9 × 80.9 mm25 parts2LMIT0
ESP32PiZeroHat
65 × 45 mm9 parts2LNo license2
ESP32SnakeTank 4 sig pwr gnd sig
80.5 × 42.7 mm46 parts4LNo license1
ESP32Nescart fc Rev A-FC
90 × 66.8 mm80 parts6LMIT0
ESP32Sensor data logger
mrcha033
70 × 50 mm16 parts2LApache-2.02
ESP32Bench sensor logger usb 5eab0a5d
70 × 50 mm14 parts2LApache-2.02
ESP32Bench sensor logger usb b204035a
70 × 50 mm14 parts2LApache-2.02
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.