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.
Nice60
Nicell
285 × 94.6 mm140 parts2LMIT28
RP2040/RP2350RD56
lhm0
120 × 118.5 mm263 parts4LCC-BY-NC-4.025
ESP32WebScreen
HW-Lab-Hardware-Design-Agency
60.6 × 27.6 mm76 parts4LCERN-OHL-P-2.013
STM32ED060SC4-Driver-Board-Hardware
Mael-Le-Garrec
71.3 × 44.5 mm73 parts4LNo license9
STM32RF-to-USB
RemiFM
50 × 20 mm52 parts4LMIT4
ESP32Launch-Party-Badge-Software
poorawsanhsirk
178 × 110 mm404 parts4LNo license3
ESP32Pilot 6 axis
X-Lemon-X
171 × 83.9 mm125 parts2LMIT2
ESP32ESP32 E-Reader
IS7V4N
62.5 × 96.2 mm85 parts4LNo license2
ESP32Bramble
justinlindh
96 × 50 mm84 parts2LMIT2- schematic only · 82 partsSTM32
Filament-Guillotine
Zephino
82 partsCC-BY-SA-4.02 
ESP32Wooden Clock - main board
tibm
110 × 110 mm183 parts4LNo license1
ESP32Security-Alarm-Panel
Matyas604
100 × 73.9 mm113 parts2LGPL-3.01
STM32CustomDisplay-Hardware-F7
svcguy
76.2 × 68.6 mm92 parts4LGPL-3.01
Nordic nRFMacro-Keyboard v4
NikolasKelava
81 × 112.2 mm65 parts4LMIT1
STM32Nocta-One-Hardware
NoctaLabs-Sh
45 × 69 mm55 parts4LCERN-OHL-S-2.01
Equinox-V1
ishantmahatopro
464.5 × 129.1 mm246 parts2LNo license0
STM32Tachi-Ninja
CreatorPoints
308.5 × 129 mm201 parts2LMIT0
ESP32Waypoint
M-Mrk
140 × 80 mm129 parts4LNo license0
RP2040/RP2350Trinketcore
alph4345
40 × 60 mm106 parts4LNo license0
ESP32Goofy ahh epaper watch
haohaohaoyan
66 × 36 mm50 parts2LNo license0
ESP32Rubber-Ducky
33 × 90.3 mm49 parts2LNo license0
ESP32GlucoBit
jdharcourt
55 × 30.4 mm43 parts4LNo license0
RP2040/RP2350Misterydev20k
MiSTle-Dev
90 × 67 mm162 parts2LNo license17
ESP32DevKitTell
25.5 × 62.8 mm26 parts4LMIT1
ESP32Esp32tux mini
tux-friend
26 × 26 mm55 parts2LGPL-3.018
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.