Open source PCB designs you can simulate
21,636 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/ArduinoLimeRFE
myriadrf
141.1 × 178.5 mm1325 partsNo license28
AVR/ArduinoDigitalTemperatureController
charlesbaynham
80 × 100 mm163 parts4LNo license14
AVR/ArduinoGP22 RF Photon Correllation
100 × 100 mm116 parts4LNo license11
AVR/ArduinoMhi xy bus
iblue
91.4 × 40.6 mm66 parts2LNo license6
AVR/ArduinoTaggerMainboard
Infinitag
158 × 34 mm55 parts2LNo license6
AVR/ArduinoNicoEFI-ECU-Speeduino mega2561
NicoEFI
85 × 100 mm135 parts2LNo license5
AVR/ArduinoUZ80
adzierzanowski
231.4 × 159.9 mm112 parts2LNo license2
AVR/ArduinoJeden board
Wojtekb30
62.5 × 61.5 mm29 parts2LCustom license2
AVR/ArduinoIn Board Gnia
MbFredys
53 × 68 mm97 parts2LMIT1
AVR/ArduinoSegment Display Board
FRC-1721
58.4 × 141 mm90 parts2LNo license1
AVR/ArduinoSpot Welder Hardware
andrewvh4
263.7 × 182.9 mm150 parts2LNo license0
AVR/ArduinoDigital synth
giacomogramaglia
165 × 90.1 mm135 parts2LNo license0
AVR/ArduinoDigit Colon
kuellenberg
140.5 × 213 mm108 parts2LNo license0
AVR/ArduinoUDS-logger
rkhvrnen
120 × 60 mm82 parts2LMIT0
AVR/ArduinoAmiga Drawbridge
tebl
90 × 94 mm18 parts2LNo license51
AVR/ArduinoArduino nano with battery integration
Chirag-Vadrali
79.5 × 35.7 mm90 parts4LNo license1
AVR/ArduinoDigit
107 × 213 mm98 parts2LNo license0
AVR/ArduinoRr dev board
frep
100 × 80 mm100 parts2LNo license2
AVR/ArduinoComponent tester
kitspace
100.4 × 83 mm79 parts4LNo license1
AVR/ArduinoController
213 × 24 mm82 parts2LNo license0- schematic only · 6 partsAVR/Arduino
Arduino nano
lhondareyte
6 parts2LCC-BY-4.01 
AVR/ArduinoPower supply
180.7 × 180.7 mm48 parts2LNo license0
AVR/ArduinoTomo
kwan3217
35.6 × 55.9 mm57 parts2LGPL-2.02
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?
21,636 boards from 10,868 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.