Vacuum tubes replaced relays as the main elements for computation. A simplified circuit that implements the NOR logic gate, which only outputs 1 when both inputs are o, is show at the right.

That! Gate!, a fun and educational toy that [BKriet] ultimately donated back to the class (that’s a hot move in our book). The objective of this game is to figure out which logic gate is being ...

A collection of transistors and resistors that implement Boolean logic operations in a digital circuit. Logic gates have one or two 0 or 1 inputs but only one 0 or 1 output as in the following ...

A single digital signal has only two states - on or off. However, if you use two inputs you can double the number of possible states, to four.