Simple XOR Gate.

Simple XOR Gate with LED. Shows the working of an XOR gate with a 5v source. I used 2 pulldown resistors to give the XOR gate the LOW input when the switches are open, otherwhise they would be floating and weird things can happen. Such as the XOR gate detecting a high input when floating, making the LED turn on even when the switches are open. The XOR gate OUTPUT turns HIGH when "only" 1 of the INPUTS is HIGH. When both INPUTS are HIGH. The OUTPUT turn LOW. ----------------------------------------------------- Please bare in mind (altough not showing here) that besides the INPUT and OUTPUT pins the XOR gate also has VDD (5Volt) and VSS (Ground) pins which need to be connected to 5 Volts and GROUND. This XOR gate would have 5 pins. 1) VDD (5volts) 2) VSS (Ground) 3) Input pin. 4) Input pin 5) Output pin. The XOR gates come in a variety of "packages" (IC'S). For example a XOR Gate with 3 or 4 INPUTS. There are also IC'S with 2 or more XOR Gates on 1 IC.

published 11 years ago