An elementary electronic circuit in the arithmetic logic unit (ALU) of the CPU that adds one bit to another. The output of the half-adder is a result of 0 or 1 and a carry of 0 or 1. Additional ...
In order to answer these questions a bit more and start learning programming, [Nakazoto] built a 10-bit binary adder with relays ... a carry register board and a 1-bit ALU board.