966 open source PCB designs, indexed by the chip they’re built around
Real boards from 323 public GitHub repositories, read straight from their KiCad files: size, layers, the full parts list and a render of the PCB. Find one close to what you’re building, then simulate its firmware on HardLabs before you order anything.
STM32Quantum control
embeddedos-org
280 × 200 mm740 parts16LMIT8
STM32Bioelectronics
160 × 120 mm641 parts12LMIT8
STM32Inference servers
420 × 300 mm637 parts16LMIT8
STM32Sigint systems
280 × 200 mm631 parts16LMIT8
STM32Rad tolerant electronics
233 × 220 mm547 parts16LMIT8
STM32Sonar systems
233 × 160 mm538 parts12LMIT8
STM32C4isr
260 × 200 mm525 parts14LMIT8
STM32Hardware security modules
300 × 200 mm510 parts16LMIT8
STM32Telemetry systems
160 × 100 mm503 parts12LMIT8
STM32Electronic warfare
233 × 160 mm502 parts14LMIT8
STM32Npu subsystems
120 × 90 mm460 parts14LMIT8
STM32Rural connectivity
260 × 200 mm446 parts14LMIT8
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?
966 boards from 323 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.