HardLabs

8mux

fread·visvitalis·new-parts/8mux/8mux.kicad_pcb

8mux PCB layout, top view — open source board by fread
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About the 8mux PCB

8mux is an open source PCB design by fread, published on GitHub. It is a 2-layer board measuring 68.6 × 73.7 mm, with 9 components from 4 distinct parts.

By type, the board carries 4 connectors, 4 relays and 1 diode.

From the project

A very simple modular relay computer

This project contains plans for PCB modules to build a relay processor, complete with assembler and emulator. While the actual processor is made out of relays (and the occasional diode), memory is emulated by ESP-based boards. Their firmware also provides for loading programs and monitoring memory contents via a USB-TTY connection.

Processors are, fundamentally, not that complicated. At any rate, you can build one out of much less than the billions of transistors required for a desktop CPU. And it's a worthwhile endeavour, too, being actually able to understand a whole processor, albeit a…

8mux bill of materials (BOM)

9 components, 4 distinct parts.

QtyPartRefs
3
BHR-10-VUA
J1, J2, J3
1
Conn_01x01
J4
4
J104D2C12VDC.15S
K1, K2, K3, K4
1
SMAJ14CA
D1

8mux design files

The KiCad project lives in the fread/visvitalis repository on GitHub; these links point at the commit this page was built from.

8mux: common questions

How big is the 8mux PCB?

The 8mux measures 68.6 × 73.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 8mux?

9 components, from 4 distinct parts. The full bill of materials is listed on this page.

Where can I download the 8mux design files?

From the fread/visvitalis repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the 8mux design in my own project?

The repository has no license, so all rights stay with fread. Use it as a reference, and ask the author before reusing the design.

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