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.
STM32Cheap-FOCer-2
shamansystems
59.1 × 99.9 mm165 partsNo license405
STM32Explorer
anyshake
100 × 100 mm244 parts2LCustom license95
STM32OTTO-Beta-Main
bitfieldaudio
288.5 × 95 mm303 parts4LCC-BY-NC-4.037
STM32Overnumpad controller 1xb
purdeaandrei
69.6 × 37.3 mm65 parts2LCERN-OHL-P-2.027
STM32Bms hardware
jsphuebner
64.5 × 85.1 mm68 parts4LGPL-3.014
STM32Fsk energymeter
luftaquila
90 × 74 mm79 parts2LCustom license13
STM32CMM2-JLC
Manawyrm
130 × 102 mm110 parts2LGPL-3.010
STM32Raccoon
mickabrig7
60 × 90 mm57 parts2LMIT9- schematic only · 9 partsSTM32
MetaForge
FidelOdok
9 partsCustom license8 
STM32OpenSTM32F4 LQFP64
phonght32
54 × 68 mm77 parts2LMIT7
STM32Infrared gun
souptik-samanta
36 × 40 mm38 parts2LNo license7
STM32Custom BMS
SCFormulaElectric
104.2 × 59.7 mm192 parts4LNo license6
STM32Quad adsr
JordanAceto
71.1 × 99.1 mm197 parts2LNo license5
STM32FOC KING
b264
75.2 × 99.5 mm238 parts4LNo license3
STM32Stm midi poc1
LispEngineer
100 × 100 mm111 parts4LCC-BY-SA-4.03
STM32ProPrj Project Ignis 2026-06-03
Shourya-x
123.2 × 67.9 mm71 parts2LNo license3
STM32PDU
OpenSkyHawk
96.6 × 63.9 mm67 parts2LCC-BY-NC-4.03
STM32Stm32-nrf24-wireless node
denysderihlazov
46 × 75.9 mm46 parts2LMIT3
STM32Dragonfly
Broccoliux
66 × 58.8 mm226 parts4LMIT2
STM32Dual Slope Generator
99.1 × 99.1 mm163 parts2LCC-BY-4.02
STM32Neptune toolboard
LoicGRENON
70 × 80 mm110 parts4LGPL-3.02
STM32UltraHawk
InSynchronous
50 × 87 mm76 parts2LMIT2
STM32KHATAF-F411
xXsenseiXx
51.9 × 52.8 mm67 parts4LNo license2
STM32619-J Stepper
jawher-Mansour
42 × 42 mm63 parts4LNo license2
STM32Relacon-HW
fjenner
85.7 × 54 mm48 parts2LNo license2
STM32Opy1
EvanDesR
33.2 × 31.4 mm29 parts2LNo license2- schematic only · 82 partsSTM32
Filament-Guillotine
Zephino
82 partsCC-BY-SA-4.02 
STM32Sampling mesh monitor
jaseg
100 × 100 mm229 parts6LCC-BY-SA-4.01
STM32PCB DRONE C8
ArduProject
102 × 49 mm140 parts4LMIT1
STM32Dev Board STM32F769
MarvinBrth
52 × 52 mm138 parts6LNo license1
STM32CNTRL
Arav0001
78 × 78 mm126 parts4LMIT1
STM32Atc roip gateway
ajisrawi
125 × 95 mm99 parts4LCustom license1
STM32CustomDisplay-Hardware-F7
svcguy
76.2 × 68.6 mm92 parts4LGPL-3.01
STM32Kicad rfm95-breakout board
Bamelink
69.2 × 67 mm60 parts2LNo license1
STM32Stm32-can do dev board
kurtjd
54 × 78 mm49 parts2LMIT1
STM32STM32F103 dev board
christophmeyer
50 × 57 mm32 parts4LMIT1
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.