HardLabs

Inv

fread·visvitalis·new-parts/inv/inv.kicad_pcb

Inv PCB layout, top view — open source board by fread

About the Inv PCB

Inv is an open source PCB design by fread, published on GitHub. It is a 2-layer board measuring 59.7 × 108 mm, with 18 components from 3 distinct parts.

By type, the board carries 8 relays, 8 diodes and 2 connectors.

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…

Inv bill of materials (BOM)

18 components, 3 distinct parts.

QtyPartRefs
2
BHR-10-VUA
J1, J3
8
J104D2C12VDC.15S
K1, K2, K3, K4, K5, K6, K7, K8
8
SMAJ14CA
D3, D6, D9, D12, D15, D18, D21, D24

Inv design files

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

Inv: common questions

How big is the Inv PCB?

The Inv measures 59.7 × 108 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Inv?

18 components, from 3 distinct parts. The full bill of materials is listed on this page.

Where can I download the Inv 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 Inv 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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