Open source PCB designs you can simulate
13,323 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.
ESP8266Espway
espway
43 × 34.3 mm33 parts2LLGPL-3.0122
ESP8266PC-KHARON-386-MAIN
UzixLS
100 × 100 mm157 parts4LCC-BY-SA-4.0111
ESP8266Basicengine
uli
85 × 56 mm44 parts2LNo license48
ESP8266MIST.1010
100 × 100 mm259 parts2LMIT43
ESP8266Iot wifi uno hw
iotmakervn
68.5 × 53.3 mm48 parts2LNo license26
ESP8266Esp8266-led dimmer
stelioskat
36 × 31 mm10 parts2LMIT20
ESP8266Divtiesus maple
anarsoul
76.5 × 56.9 mm41 parts2LGPL-3.016- schematic only · 6 partsESP8266
Epaper
junglejim8
6 partsNo license16 
ESP8266ESP-Hiro
Chrismettal
100 × 50 mm79 parts2LGPL-3.015
ESP8266Phloppy 0
piotr-wiszowaty
110 × 55 mm83 parts4LGPL-3.012
ESP8266Seatalk wifi
atonizzo
31 × 22 mm32 parts2LApache-2.012
ESP8266Zx sizif-512-wifi
21.9 × 29.5 mm11 parts2LNo license12
ESP8266Wb2s to esp12
lsr1
24.1 × 20.1 mm8 parts2LNo license11
ESP8266UnlockOslo
jonnor
65 × 56 mm89 parts2LMIT10
ESP8266Aria
adamjvr
80 × 27 mm70 parts4LNo license7
ESP8266Esp8266 apa102 bulb
robertfoss
92.4 × 91.4 mm113 parts2LGPL-2.05
ESP8266PoolMonitor
tpanajott
54.4 × 31 mm28 parts4LNo license5
ESP8266Hw trials
forGGe
49.5 × 49.5 mm28 parts2LNo license3
ESP8266ZXEVO.1010 (TOP board)
100 × 100 mm208 parts2LNo license24
ESP8266Environment monitor-1.2
theopensourcerer
31.1 × 52.1 mm14 parts2LNo license8
ESP8266Wifi receiver transmitter
Eryk-Mozdzen
38 × 38 mm27 parts2LNo license9
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?
13,323 boards from 6,326 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.