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10-Bit Relay Adder
4-bit relay adder
Relay Computer ep. 2 - Building the 16-bit adder (part 1)
8-Bit Adder built from 152 Transistors
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Last Updated: June 17, 2026
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Overview of Relay Adder

In this video we learn about the basic theory of binary adders and I build and test the PCB for my 16-bit NOTE: The schematics incorrectly show the NPN transistors in reverse, with collector / emitter swapped. This is my first attempt at ... Thank for washing EDIT: I submitted this project to Hackaday and they wrote an article about it! Read that here: ... In this video I go into detail about how to make all the logic gates using Sumador de 4 bits utilizando 16 relés DPDT (8 contactos). Al final se muestra el esquema en el que está basado el cableado. In this video I go into a little more depth on what each individual board does and try to break down the crazy person web in my ...
First test of my implementation of the ridiculously cool Zuse
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