Open source PCB designs you can simulate
20,833 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.
PICNeptune
Board-Folk
191.2 × 190.9 mm372 parts4LNo license175
Z80-cmos nmos tester
djtersteegc
81.3 × 86.4 mm38 parts2LMIT61
MegaDrive
stonedDiscord
239.3 × 191 mm256 parts2LNo license47
Jupiter-II
ricaflops
164.5 × 89.5 mm122 partsMIT43
Zx2022
michalin
100 × 100 mm34 parts2LGPL-3.041
Mgh80
Kris-Sekula
100 × 100 mm32 parts2LNo license34
Sg1000
barbeque
162.2 × 134.6 mm71 parts2LCC-BY-NC-4.033
C128-z80-8mhz
ytmytm
31.5 × 75.7 mm11 parts2LNo license28
RetroZ SBC for S80
formix
127 × 73.7 mm48 parts2LApache-2.022
Main
ceteras
299.2 × 180 mm352 parts2LMIT11
Mainboard
mianderson2469
101.4 × 137.7 mm33 parts2LNo license3
JFF
herraa1
250 × 150 mm132 parts2LGPL-3.02
AVR/ArduinoUZ80
adzierzanowski
231.4 × 159.9 mm112 parts2LNo license2
Z80-cmos nmos tester
Vakon84
81.3 × 86.4 mm38 parts2LMIT2
Mgh80 1.0
100 × 100 mm29 parts2LNo license34
Pat80
penguin86
305.4 × 204.8 mm44 parts2LNo license3
Wz80 Mainboard
makesthingsxyz
83.8 × 85.1 mm11 parts2LMIT3
Uz8021-v2
124 × 126.5 mm50 parts2LNo license2
Z80 schematics
roberto314
100 × 100 mm62 parts2LNo license1
Z80 adapter
hoglet67
49 × 75.2 mm47 parts2LGPL-3.0109
Z80 adapter
49 × 75.2 mm47 parts2LNo license66
Z80 adapter
sharpie7
49 × 75.2 mm47 parts2LGPL-2.019
Z80 Cpu Board
obiwanjacobi
99.7 × 99.7 mm38 parts2LCustom license16
Z80 adapter
DopierRex
49 × 75.2 mm47 parts2LGPL-3.010
RackZ80 - Processor Board
jkreucher
160 × 100 mm39 parts2LGPL-3.02
CPU
KALTCHUK
99.7 × 69.9 mm29 parts2LNo license94
Z80blinken
jblang
101.6 × 53.3 mm27 parts2LMIT73
Z80Proto
transistorfet
59.7 × 99.7 mm22 parts2LGPL-3.069
Z80 adapter
49 × 75.2 mm47 parts2LGPL-3.017
Z80ram
99.8 × 49.9 mm19 parts2LMIT73
Z80
dennis9819
160 × 100.3 mm64 parts2LNo license2
NXPMCLZ8
MicroCoreLabs
37.1 × 61.5 mm6 parts4LNo license532
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?
20,833 boards from 10,409 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.