5,776 open source PCB designs, indexed by the chip they’re built around
Real boards from 2,818 public GitHub repositories, read straight from their KiCad files: size, layers, the full parts list and a render of the PCB. Find one close to what you’re building, then simulate its firmware on HardLabs before you order anything.
AVR/ArduinoRam Tester
tops4u
39.8 × 59.4 mm35 parts2LGPL-3.0111
AVR/ArduinoAdbuino
akuker
30.5 × 63 mm43 parts2LGPL-2.060
AVR/ArduinoCard-Sized-Midi-Controller
sensai7
85.7 × 54 mm35 parts2LGPL-3.030
AVR/ArduinoISOlation
str-dst
27.5 × 40.3 mm20 parts2LNo license18
AVR/ArduinoGeneralPurposeAlarmDevice
PubInv
137.2 × 83.8 mm132 parts2LAGPL-3.07
AVR/ArduinoNoPour
plertvilai
45.7 × 66 mm68 parts2LMIT7
AVR/ArduinoOpenTRV-Arduino-V0p2
opentrv
65 × 56.5 mm38 partsApache-2.05
AVR/ArduinoRPM-counter
midasgossye
68.9 × 23 mm62 parts2LNo license3
AVR/ArduinoTail lights
chrskly
145 × 115 mm118 parts2LNo license2
AVR/ArduinoDropbot-40-channel-HV-switching board.
sci-bots
84 × 92 mm204 partsCustom license1
AVR/ArduinoPi top Glimmer
uChip
65 × 56 mm102 parts4LNo license1
AVR/ArduinoControlBoard rev05a
44.5 × 57.8 mm64 parts2LMIT7
AVR/ArduinoData Logger
Shourya-x
50.8 × 40.6 mm25 parts2LNo license3
AVR/ArduinoUnrouted
44.5 × 57.8 mm63 parts2LMIT7
AVR/ArduinoSensored BLDC Controller
rjwalters
70 × 90 mm42 parts4LMIT63
AVR/ArduinoSensored BLDC Controller
70 × 90 mm42 parts4LMIT63
AVR/ArduinoPCB D
dragondgold
47 × 47 mm39 parts2LGPL-3.01
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?
5,776 boards from 2,818 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.