There are seven basic logic gates: AND, OR, XOR, NOT, NAND, NOR, and XNOR. Most logic gates have two inputs and one output. At any given moment, every terminal is in one of the two binary conditions low (0) or high (1), represented by different voltage levels such as 5V. The logic state of a terminal can, and generally does, change often, as the circuit processes data. In most logic gates, the low state is approximately zero volts (0V), while the high state is approximately five volts positive (+5V). I’ve arranged these different logic gates respectively to showcase their input/output differences. These examples could be used as a visual logic gate truth table for quick referencing purposes.
