Contemporary logic circuits use MOSFETs as the elements to build gates, but there are many ways to implement them. Using relays is one of them, and you can literally see how they work.

The order of precedence is less well defined for logic circuits, like XOR or NAND, which are derived from the three basic circuits. It is best to use parenthesis to clarify the order of operations ...

A simple logic circuit that is used to connect complex logic circuits together. For example, an ASIC chip may contain large functions, such as a microprocessor, memory block or communications ...

See SoC. Circuits were originally designed by humans. Today, logic functions reside in electronic libraries, and designers pick and choose from a menu. However, new circuits have to be designed by ...