REFERENCE DESIGNS

Open hardware, with the files to prove it.

887 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

887

With a design page

887

KiCad projects

405

Elektrosluch 3 Plus

by LOM-instruments

Elektrosluch 3+ • electromagnetic listening device

73 12No license

EAGLE source

Audio & music

freeDSP CLASSIC

by freeDSP

The freeDSP CLASSIC is a digital signal processor module based on the ADAU1701 and mainly THT components.

43 21No license

EAGLE source

Audio & music

Thinks

by kweiwen

through hole version of mutable instruments links

35 8No license

Proto Pedal board, published by sparkfun

EAGLE source

Audio & music

Proto Pedal

by sparkfun

Prototyping board combined with the fundamental parts of a guitar stompbox.

31 6Custom

MinimumViableSynth board, published by kbob

EAGLE source

Audio & music

MinimumViableSynth

by kbob

A virtual analog synthesizer with lots of knobs and buttons.

28 0GPL-3.0

Preamp Passive board, published by FutureSharks

EAGLE source

Audio & music

Preamp Passive

by FutureSharks

This is the Arduino code, PCB layouts and 3D drawings for a HiFi passive preamplifier

14 5GPL-2.0

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Repository topics

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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