5,331 open source PCB designs, indexed by the chip they’re built around
Real boards from 2,584 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.
WCH CH32/CH55xTrhmsx
cristianoag
150.4 × 120.4 mm127 parts4LNo license29
FreeDSP-OCTAVIA
freeDSP
178 × 99 mm505 parts4LCC-BY-SA-4.019
FreeDSP-G
170 × 101 mm367 parts4LCC0-1.06
STM32Quad adsr
JordanAceto
71.1 × 99.1 mm197 parts2LNo license5
ESP8266Trhmsx
wagnertavares
150.4 × 120.4 mm120 parts4LNo license4
STM32Stm midi poc1
LispEngineer
100 × 100 mm111 parts4LCC-BY-SA-4.03
ESP32Kiki player
alaotach
86 × 109.7 mm42 parts2LNo license2- schematic only · 40 partsESP32
Moto Audio
bacnbit
40 partsNo license2 
NXPMdt chipdown
andykarpov
94 × 79.6 mm61 parts2LMIT1
ESP32GameBoy-Mp3-Plater
amkhan2009
52.8 × 68.5 mm40 parts2LMIT0
ESP32Tuyyo-Hackclub
andaniayan-jpg
99.9 × 99.9 mm28 parts2LNo license0
RP2040/RP2350Speek rx
JBlitzar
80 × 60 mm51 parts2LGPL-3.01
RP2040/RP2350Toepler plus
niektb
20 × 106 mm112 parts2LCC-BY-SA-4.034
RP2040/RP2350PI SCOPE
40 × 110 mm97 parts2LCC-BY-SA-4.034
Fv1 module
40 × 110 mm80 parts2LCC-BY-SA-4.034
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?
5,331 boards from 2,584 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.