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.
AVR/ArduinoAlphabets V2 ATtiny1624 millable ring module
TheBeachLab
50 × 50 mm26 parts2LMIT133
AVR/ArduinoQron0b
qewer33
35 × 35 mm29 parts2LGPL-3.062
AVR/ArduinoDSKY
Apollo-Replica
169.9 × 190.9 mm116 parts2LCC-BY-NC-4.019
AVR/ArduinoMSAP-2 rev.A
mehrantsi
240 × 1056 mm658 parts2LMIT13
AVR/ArduinoKicad Smart Watch
AFLProjects
36.4 × 29.4 mm48 parts2LNo license12
AVR/Arduino2-digit-Turbo-Display
wiretap-retro
39.1 × 30 mm15 parts2LNo license12
AVR/ArduinoThe Bonkulator
shannon-greenlight
70.8 × 110 mm255 parts4LGPL-3.011
AVR/ArduinoDRAM-Tester x1x4-lcd
goriponsoft
100 × 100 mm42 parts2LGPL-3.09
AVR/ArduinoKoalafications
swiftrax
304.8 × 123 mm186 parts2LCC0-1.07
AVR/ArduinoTravis num2024
dieseltravis
85.2 × 137.8 mm81 parts2LCustom license5
AVR/ArduinoKOTH V2
Salted-Peanuts
100 × 100 mm41 parts4LMIT4
AVR/ArduinoNixiedisp
jtsiomb
140 × 76.1 mm224 parts2LGPL-3.03
AVR/ArduinoRPM-counter
midasgossye
68.9 × 23 mm62 parts2LNo license3
AVR/ArduinoMacropad
vlee6
58.5 × 80.9 mm52 parts2LNo license2
AVR/ArduinoMentor
F6ITU
50 × 100 mm48 parts2LNo license2
AVR/ArduinoMithril panneled
sanfeps
132.8 × 138.8 mm216 parts4LNo license1
AVR/ArduinoNamePlate
scottalmond
254 × 40.6 mm119 parts2LNo license1
AVR/ArduinoCamplight
codingkatty
76.1 × 25.4 mm36 parts4LMIT1
AVR/ArduinoHSOD-Home-Security-Of-DOOM
NattDocumented
94.6 × 120.6 mm35 parts2LNo license1
AVR/ArduinoNixie Clock
haXoru5
140 × 60 mm34 parts2LNo license1
AVR/ArduinoDiy shift indicator
Rav4s
99 × 68 mm27 parts2LGPL-3.01
AVR/ArduinoRunning-Tracker-Widget
Ziegen-EE
91.5 × 51.5 mm17 parts2LMIT1
AVR/ArduinoLEDMusicVisualizer
VinayBhagavath
61.5 × 50.3 mm16 parts2LNo license1
AVR/ArduinoElectrical-Engineering-Portfolio
SyedIhteshamuddin
46.5 × 65 mm16 parts2LNo license1
AVR/ArduinoQueue-Local-Display-ATmega328PB
ByNS-KARACA
340 × 100 mm188 parts2LNo license0
AVR/ArduinoPCB Business Card
Bumb1eris
85.6 × 54 mm73 parts2LMIT0
AVR/ArduinoPCB4 Noods
ahaimour2005
107 × 78 mm71 parts2LMIT0
AVR/ArduinoHeater controller rev a
manhoosbilli1
47.2 × 45.8 mm62 parts2LNo license0
AVR/ArduinoEngine monitor
alexanderenrique
50.8 × 38.1 mm60 parts2LNo license0
AVR/ArduinoHelios
kyriosaa
149.9 × 125.7 mm59 parts2LNo license0
AVR/ArduinoKM11 mainboard
fjalvingh
131.8 × 80 mm41 parts2LNo license0
AVR/ArduinoMeniscus controller
EdSmithe
76 × 91 mm10 parts2LNo license0- schematic only · 18 partsAVR/Arduino
Doppler speed detector
darksunnp
18 partsNo license0 
AVR/ArduinoAlphabets V2 ATtiny44 millable ring module
50 × 50 mm21 parts2LMIT133
AVR/ArduinoMSAP-2 rev.A SMD
178 × 711 mm658 parts2LMIT13
AVR/ArduinoKicad Smart Watch old
31.1 × 26 mm39 parts4LNo license12
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.