Instead of going with silicon-based switching (ie: transistors) this 4-bit adder uses mechanical relays. We like it for its mess of wires (don’t miss the “assembly” page which is arguably ...

The Adder/Subtracter module can implement adders (A+B), subtracters (A–B), and dynamically configurable ... The Beyond BA22 32-bit processor offers the highest code density of any processor in its ...

[Phillip] wanted to play with the C preprocessor. He decided to do that by creating a 4 bit full adder. We know this is pretty useless in everyday life, but it was a great learning experience.