Open source PCB designs you can simulate
23,833 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.
AVR/ArduinoRedox keyboard
mattdibi
162.2 × 126.5 mm77 parts2LMIT2.0k
AVR/ArduinoSU120 Yakitori Keyboard
e3w2q
98.8 × 98 mm133 parts2LMIT393
AVR/ArduinoLagom
mohoyt
305.6 × 121.8 mm167 parts2LCC-BY-NC-4.0143
AVR/ArduinoSmall paintbrush
artseyio
94 × 47 mm19 parts2LNo license135
AVR/ArduinoBanime40
ChrisChrisLoLo
190.5 × 76.2 mm88 parts2LCC-BY-SA-4.0111
AVR/ArduinoHumla
jimmerricks
210.2 × 94.3 mm77 parts2LMIT85
AVR/ArduinoLitl keyboard
248.3 × 99.8 mm103 parts2LCC-BY-NC-4.075
AVR/ArduinoLergo modular
AxelVoitier
96.3 × 96 mm72 parts2LNo license70
AVR/ArduinoKbic65
b-karl
313.3 × 131.6 mm150 parts2LMIT67
AVR/ArduinoLittle Big Scroll 6
TweetyDaBird
59.2 × 87 mm21 parts2LCC-BY-SA-4.055
AVR/ArduinoQol56
eswai
272 × 86 mm171 parts2LNo license48
AVR/ArduinoQuefrency right-65
keebio
178.6 × 99.4 mm100 parts2LMIT45
AVR/ArduinoNeopad
ivndbt
99.2 × 88.3 mm19 parts2LGPL-2.021
AVR/ArduinoRight
csun
210.9 × 125.7 mm89 parts2LCustom license20
AVR/ArduinoObiwanstenobit
93.8 × 98.5 mm51 parts2LCERN-OHL-S-2.019
AVR/ArduinoKiCad Project
CatGirlGF
257.2 × 95.3 mm109 parts2LMIT15
AVR/ArduinoStorre
304.8 × 146.8 mm195 parts2LCC-BY-NC-4.011
AVR/ArduinoYouwu36
190.5 × 76.2 mm74 parts2LNo license11
AVR/ArduinoPcb arcade encoder
klein0r
56.6 × 38.7 mm3 parts2LMIT11
AVR/ArduinoCornel
hibiyasleep
268.5 × 110.5 mm182 parts2LNo license9
AVR/ArduinoKeaboard rev1
keawade
141.9 × 93.7 mm55 parts2LNo license7
AVR/ArduinoPcb knx busankoppler
42.2 × 37.3 mm3 parts2LMIT6
AVR/ArduinoOccitel mini
silicium-org
93.3 × 69.7 mm11 parts2LMIT5
AVR/ArduinoPalac
isavcic
139.6 × 113.5 mm71 parts2LMIT3
AVR/ArduinoHelp
rqcoon
173 × 57.2 mm27 parts2LMIT3
AVR/ArduinoKintsugi v2
apaydev
384.7 × 101.5 mm176 parts2LMIT1
AVR/ArduinoNeolexis
rhettjay
141 × 103.6 mm121 parts2LGPL-3.01
AVR/ArduinoKiCad Project
Hieupham0012
257.2 × 95.3 mm109 parts2LNo license1
AVR/ArduinoEgpad
ohkiba
111.1 × 133.4 mm59 parts2LMIT1
AVR/ArduinoMacro pad
jonathanwpaul
108 × 122 mm58 parts2LNo license1
AVR/ArduinoPcb mixer
anqueue
113 × 76 mm6 parts2LNo license1
AVR/ArduinoSmall paintbrush hotswap
94 × 50 mm17 parts2LNo license135
AVR/ArduinoQuefrency left macro
181 × 99.4 mm93 parts2LMIT45
AVR/ArduinoLeft
190.5 × 125.7 mm72 parts2LCustom license20
AVR/ArduinoWideZlant
Spaceboards
281 × 76.2 mm114 parts2LCERN-OHL-W-2.0144
AVR/ArduinoLittle Big Scroll 4
83.6 × 40 mm19 parts2LCC-BY-SA-4.055
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?
23,833 boards from 12,066 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.