These different implementations of a half-adder illustrate the trade-offs made during circuit design. Integrated circuits contain multiple gates of a type, say NAND gates.

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.

Most of us can do simple math in our heads, but some people just can’t seem to add two numbers between 0 and 3 without using paper, like [Aliaksei Zholner] does with his fluidic adder circuit ...

A full-adder circuit is used in digital electronics to process three input signals to produce the two output signals Sum and Carry according to a defined truth table.

A technical paper titled “Analysis of Logic-in-Memory Full Adder Circuit With Floating Gate Field Effect Transistor (FGFET)” was published by researchers at Konkuk University, Korea National ...