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.
ESP32Open motorcycle intercom
d3vv3
100 × 50 mm116 parts4LMIT49
ESP32WebScreen
HW-Lab-Hardware-Design-Agency
60.6 × 27.6 mm76 parts4LCERN-OHL-P-2.013
ESP32Launch-Party-Badge-Software
poorawsanhsirk
178 × 110 mm404 parts4LNo license3
ESP32OSCD Demo
tmjnijssen
94.6 × 94.6 mm76 parts4LCERN-OHL-P-2.03
ESP32Pilot 6 axis
X-Lemon-X
171 × 83.9 mm125 parts2LMIT2
ESP32Moskill
telagod
30 × 100 mm90 parts2LNo license2
ESP32Hardware-TUDCTF2025
Emway79
49.5 × 57.7 mm56 parts2LCC-BY-SA-4.02
ESP32Esp32s3-plant monitor
MuffinByteLabs
62.5 × 44.5 mm51 parts4LCERN-OHL-P-2.02- schematic only · 9 partsESP32
Kicad iot sensor board
bradleybeatz1313
9 partsNo license2 
ESP32Corne Cherry
mornepousse
340.8 × 104.7 mm275 parts4LMIT1
ESP32HolyGrail
whbCool
157 × 73 mm195 parts6LNo license1
ESP32BeeFASYER SPARROW
beewarden
64.1 × 72.8 mm121 parts4LCERN-OHL-S-2.01
ESP32Security-Alarm-Panel
Matyas604
100 × 73.9 mm113 parts2LGPL-3.01
ESP32WellD
kinggh0stee
100 × 55 mm99 parts2LMIT1
ESP32Msxnano dock
Papipapito
120 × 70 mm85 parts2LNo license1
ESP32Luma
notaroomba
40 × 58 mm78 parts2LNo license1
ESP32Helix vape
stevensun369
30 × 97 mm77 parts2LNo license1
ESP32ESP32-RS485-Lipo Battery
SushantSaroch13
75.1 × 60 mm63 parts4LNo license1
ESP32Pocket lightning detector
99.7 × 35 mm56 parts2LGPL-3.01
ESP32ENV Sensor - Variant A (Compact)
marcelpetrick
30 × 34 mm43 parts4LGPL-3.01
ESP32DroneMagNav2.0
ajisrawi
128 × 84 mm218 parts4LCustom license0
ESP32SAVITAR-V2
alexandru-mot
54.9 × 46.3 mm135 parts4LNo license0
ESP32ESP32-S3-4Layer-CoreBoard
gorkemguven
102.9 × 43.7 mm101 parts4LGPL-3.00
ESP32Poket
kaorii-ako
80 × 54 mm100 parts4LMIT0
ESP32Esp32-sensor board
marwantm
99.6 × 55.9 mm80 parts4LNo license0
ESP32ESP32-IoT-Sensor-Hub-Manufacturing-Ready-
Asaf66
79.5 × 61.4 mm80 parts4LNo license0
ESP32OakBridge MkI
HighCarlSagan
91.9 × 72 mm78 parts2LCustom license0
ESP32Quake sensor
ismailcelik-tr
65 × 58 mm54 parts2LNo license0
ESP32Goofy ahh epaper watch
haohaohaoyan
66 × 36 mm50 parts2LNo license0
ESP32GlucoBit
jdharcourt
55 × 30.4 mm43 parts4LNo license0
ESP32C3-pico
FrancoSpitale
28.4 × 51.5 mm21 parts2LMIT0
ESP32VENDETTAFC
Caped-Crussader
43.6 × 43 mm129 parts6LCERN-OHL-S-2.028
ESP32Moskill backup
30 × 100 mm90 parts2LNo license2
ESP32Corne Cherry
169.3 × 198.4 mm275 parts4LMIT1
ESP32ENV Sensor - Variant B (Thermally isolated)
28 × 51 mm43 parts4LGPL-3.01
ESP32DevKitTell
NikolasKelava
25.5 × 62.8 mm26 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.