With just one double relay, you can make an adder capable of performing 1bit additions:
0 + 0 = 0
0 + 1 = 1
1 + 0 = 1
1 + 1 = 0 ( with Carry = 1 )
The circuit design isn’t mine, I found it with a quick google search.
This is the complete schematic of the above circuit.
i don’t understand
that schematic is not clear to me i have a short of seven years of studying electronics as an hobby and i can’t get what is drawn
That is a double relay, A and B are inputs ( and as it is shown in the truth table, A and B can only have two values, “1” (V+) or “0” (GND), this is done by switches ), SUM and CARRY are outputs, therefore connected to some indicators ( light bulbs, LED, voltmeters, etc).
V+ is the operating voltage of the relay used.
I wonder if you could make a detailed schematics for your design , I have been trying to make my own copy but I could not manage to work B input , except that all functions are working.
what about full adder?
https://www.antimath.info/electro/4-bit-relay-computer/