REFERENCE DESIGNS

Open hardware, with the files to prove it.

612 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

612

With a design page

612

KiCad projects

275

Samoklava

by soundmonster

Generated keyboard

389 201MIT

pc Kharon 386 board, published by UzixLS

KiCad source

Audio & music

pc Kharon 386

by UzixLS

Tiny IBM PC compatible machine with 386 CPU, integrated VGA and sound.

109 14CC-BY-SA-4.0

rc2014 ym2149 board, published by electrified

KiCad source

Retro computing

rc2014 ym2149

by electrified

KiCad schematics and gerbers for a YM sound card for the RC2014. See it in action here: https://www.youtube.com/watch?v=-iLwi9FagFE

78 17Custom

KiCad source

Retro computing

RealSIDShield

by atbrask

An Arduino shield that makes it easy to use a MOS Technology 6581/8580 SID chip (the famous C64 sound chip)

51 11No license

Audio & music

ES688 ISA8

by hkzlab

Sound Card for the ISA (8bit) bus sporting Sound Blaster / Sound Blaster PRO emulation via ES688F chip, and a real Yamaha OPL3 FM Synth. It's also completely jumper configurable.

46 8Custom

EAGLE source

Retro computing

MUS 1099

by gemedetpaps

ISA sound card based on the SAA1099 sound generator

40 4GPL-3.0

zx Multisound board, published by UzixLS

KiCad source

Audio & music

zx Multisound

by UzixLS

ZX Spectrum soundcard for NEMOBUS/ZXBUS

37 19MIT

Audio & music

OPL2LPT Replica

by zjuyzj

A re-designed, simplified version of OPL2LPT Adlib-Compatible sound card working on printer port.

32 7MIT

KiCad source

Audio & music

picogus104

by UzixLS

PicoGUS sound card for PC/104 interface

23 2No license

KiCad source

Retro computing

zx Tsid

by UzixLS

MOS SID sound card for ZX Spectrum

22 5MIT

Retro computing

DSBClone

by Rolel

A replacement PCB for the SEGA Digital Sound Boardscused on several SEGA arcade games

13 6GPL-3.0

Retro computing

LENINGRAD 2 48k

by Alex-2-Graf

Leningrad-2. Russian ZX Spectrum clone (2025 Revision). Modernized schematic & PCB with onboard RGB2VGA/HDMI converter, AY-3-8910 sound, and expansion bus adapters.

11 4MIT

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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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