Introduction
Digital logic is the way computers process inputs from a binary system. Binary simply means there are two possible values. The values are determined by the presence of either high voltage or low voltage. In most logic and control circuitry, high voltage can be 3.3V, 5V, 12V, or 24V being common as the high value. Low voltage is 0V to usually but not always less than 2V. The value range is dependent on the part.
