An elementary electronic circuit in the arithmetic logic unit (ALU) of every CPU. The half-adder does nothing more than add one bit to another. GPUs have millions of half-adder equivalents. The output ...

Computers built using discrete logic chips? Seen it. Computers from individual transistors? Impressive, but it’s been done. A computer built out of electromechanical relays? Bring on the ozone! The ...

Does it have an "Overflow" output? I think that would be the same as "Carry Out," though it has been a few years since my cpu design class.

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 built ...