Open source PCB designs you can simulate
21,636 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.
Microchip SAMTiny LoRa Module v1 (TLM01)
azerimaker
14 × 16.5 mm54 partsCERN-OHL-S-2.061
Microchip SAMIMX6ULL tryout
cebrax
100 × 75 mm171 parts4LGPL-3.08
Microchip SAMBlinky Bowtie
joshajohnson
142.7 × 72 mm95 parts2LGPL-3.05
Microchip SAMWT-220 RPi Hat and Rear IO
tuna-f1sh
173.5 × 85 mm152 parts2LGPL-3.04
Microchip SAMSAMD21-breakout
atoomnetmarc
61.5 × 25 mm30 parts2LApache-2.02
Microchip SAMSamd21e breakout
mitsake
35.7 × 21.6 mm14 parts2LCC-BY-SA-4.02
Microchip SAMTsunamiPi
robertsonics
65 × 56 mm84 parts2LNo license1
Microchip SAMAtsamd20-breakout
elevendroids
24 × 50 mm33 parts2LCC-BY-SA-4.01
Microchip SAMSAMD21E18 LilyPad Sticker: NASA
Hugoyhu
0 × 0 mm28 parts2LMIT1
Microchip SAMMicrochip-ATSAME54-Development-Board
Albinjm72
44.7 × 76.6 mm44 parts2LCERN-OHL-S-2.00
Microchip SAMCam Hat Case Study
auxren
65 × 30 mm42 parts2LMIT0
Microchip SAMSAMD21E18 LilyPad Sticker: Enjoy Hack Club
73.2 × 38.8 mm27 parts2LMIT1
Microchip SAMAtsamd21e18a
jkiv
15.2 × 31.8 mm25 parts4LCC-BY-NC-4.05
Microchip SAMWLMS-v0 2 1-motherboard
miniscope
14 × 9.2 mm80 parts8LCERN-OHL-S-2.02
Microchip SAMWLMS-v0 2 1-motherboard panel
48 × 37.5 mm80 parts8LCERN-OHL-S-2.02
Microchip SAMSAMD51 dev board
BrownSpaceEngineering
98.9 × 130 mm58 parts4LNo license1
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?
21,636 boards from 10,868 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.