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.
STM32Bldc motor cntroller
azmat-bilal
58 × 50 mm130 parts4LMIT111
STM32PER|FORMER eurorack sequencer
westlicht
171.5 × 106.7 mm304 parts2LCC-BY-NC-4.0109
STM32F405 pill
davidmolony
54.1 × 19.4 mm46 parts4LBSD-3-Clause21
STM32Driva x2
owennewo
100 × 67 mm147 parts4LNo license9
STM32Wagyu
mmalex
25.4 × 106.7 mm95 parts4LCC0-1.09
STM32OpenDrone HW FC F405
phonght32
34 × 34 mm79 parts2LMIT7
STM32OpenSTM32F4 LQFP64
54 × 68 mm77 parts2LMIT7
STM32Custom BMS
SCFormulaElectric
104.2 × 59.7 mm192 parts4LNo license6
STM32Alturia
rckTom
45 × 24 mm96 parts4LCC-BY-NC-4.06
STM32Quad adsr
JordanAceto
71.1 × 99.1 mm197 parts2LNo license5
STM32Faderbay
vonmartins
360 × 140 mm174 parts4LNo license4
STM32Dragonfly
Broccoliux
66 × 58.8 mm226 parts4LMIT2
STM32Hackydrone
0xmanidev
51.4 × 51.4 mm64 parts2LMIT0
STM32Stm32-flight controller
bachaaymene
59 × 59 mm58 parts4LNo license0
STM32Enepaq TempSensor Board
68.9 × 129.2 mm157 parts4LNo license6
STM32Fc
cookiemonsternz
28.3 × 28.3 mm72 parts6LNo license5
STM32BMS
buglalis
103 × 57 mm192 parts4LNo license0- schematic only · 94 partsSTM32
Project Title
Choaib-ELMADI
94 parts2LNo license9 
STM32ETS Board Copy
68.9 × 129.2 mm157 parts4LNo license6
STM32LoRA board
61.2 × 38.9 mm52 parts4LNo license6
STM32UpdatedPrecharge
96.8 × 40.6 mm51 parts2LNo license6
STM32BSPD 5
40.1 × 54.3 mm24 parts2LNo license6
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.