4-bit Relay ALU (РЦВМ-1)

Relay numeric counting machine rev.1

Artem Kashkanov

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Description

Hello from 2009 year :)
I made this machine long time ago, using schematic from a book "Radioelectronic toys" wroted by Stanisław Wojciechowski

This device can Add and Substract two 4-bit numbers and Multiply 3-bit by 2-bit numbers.

USSR relay 27 x RES22 and 16 x REK23 were used

Details

Yep, it's looks like a piece of shit, but it work!

Build Instructions

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1

Schematic analysis

As we can see, default schematic is 3-bit wide, but we can easily change it to 4-bit mode
2

Adder assembly and checking
3

Control logic wiring