REFERENCE DESIGNS

Open hardware, with the files to prove it.

912 published boards whose schematic and layout source is public — KiCad, EAGLE, Altium and EasyEDA projects you can read, fork and build on. Every entry links to the original repository and names its licence.

Boards indexed

912

With a design page

912

KiCad projects

419

Display

by openhp

This device allows you to control the Valden Heat Pump via remote display. Display can be used with a signal cable up to a few hundred meters long. As well as the controller this display is an also open product with available gerber and source code.

8 5GPL-3.0

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Every project listed here belongs to its author and is linked to its original repository. Licences are read from the repository metadata and summarised for convenience — check the licence file in the project itself before you manufacture or redistribute a design. ProtoFlow does not host, mirror or verify these files. Index last rebuilt 2026-09-21.

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