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.
STM32Ferris
pierrechevalier83
208.8 × 86.8 mm102 parts2LSHL-2.11.3k
AVR/ArduinoQEZ
str-dst
194.3 × 79 mm78 parts2LCC-BY-NC-4.0110
STM32E80-1800-pcb universal
ebastler
382 × 160 mm200 parts2LBSD-2-Clause85
Nordic nRFFusion
crides
125.8 × 91.8 mm100 parts2LNo license82
STM32Bonsai C4
customMK
17.8 × 51.6 mm48 parts4LCERN-OHL-P-2.071
RP2040/RP2350Sweep
waffle87
216.9 × 86.9 mm208 parts2LSHL-2.157
AVR/ArduinoTwelvekey
75.2 × 62.6 mm52 parts2LCC-BY-NC-4.048
RP2040/RP2350Buran-Ortho
ScatteredDrifter
224.4 × 97.8 mm100 parts2LCERN-OHL-P-2.046
Nordic nRFHotswap ble
271.8 × 103.9 mm134 parts2LCC-BY-NC-4.036
RP2040/RP2350Slime88
zykrah
344.7 × 123.6 mm225 parts2LCERN-OHL-S-2.029
RP2040/RP2350Memoria
shinkaimayano
242.9 × 96.8 mm145 parts2LMIT19
Cirrus40
schuay
133.2 × 91.7 mm53 parts2LCC-BY-4.019
AVR/ArduinoISOlation
27.5 × 40.3 mm20 parts2LNo license18
AVR/ArduinoC-13X
ramonimbao
216.7 × 89.7 mm134 parts2LGPL-3.016
AVR/ArduinoSuperLyra
Malevolti
391.1 × 134.8 mm199 parts2LGPL-3.012
AVR/ArduinoEliza
259 × 88.3 mm79 parts2LNo license9
RP2040/RP2350Clacky40
229 × 80 mm128 parts2LNo license7
AVR/ArduinoBakeneko40
HorseyMask
266.7 × 76.2 mm115 parts2LMIT6
RP2040/RP2350T80-5000-right
nearestexit
210.4 × 161.9 mm115 parts2LNo license5
A side
spdidle
100 × 70 mm52 parts2LNo license2
STM32EC Pro2 Mainboard
4pplet
284.7 × 100 mm49 parts4LMIT2
Nordic nRFOrthus
Hob-dev
133.7 × 95.6 mm318 parts2LCC-BY-NC-4.01
ESP32Corne Cherry
mornepousse
340.8 × 104.7 mm275 parts4LMIT1
USB-A-Daughterboard
96.1 × 29.3 mm52 parts2LMIT36
AVR/ArduinoSuperLyra
391.1 × 134.8 mm199 parts2LGPL-3.012
RP2040/RP2350T80-5000-left
167.6 × 148.2 mm77 parts2LNo license5
EC Pro2 Controller Normal
141.5 × 36 mm48 parts2LMIT2
ESP32Corne Cherry
169.3 × 198.4 mm275 parts4LMIT1
STM32Hermod right
modern-hobbyist
3.6 × 3.3 mm212 parts2LMIT25
RP2040/RP2350T80-5700
81 × 130.6 mm56 parts2LNo license5
STM32Hermod left
3.6 × 3.3 mm196 parts2LMIT25
T80-5000-daughterboard
132.4 × 36.8 mm6 parts2LNo license5
USBHubV3
64.3 × 22 mm31 parts2LMIT36
Numpad Daughterboard
24 × 16 mm6 parts2LMIT36
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.