(This article is only for education purposes about Factory and Industrial Automation engineering. All references are shown below at the end of the article.) A multiplexer is a device that chooses amongst several input signals; it is frequently just called a "mux." It will have one output, one input control, and two signal inputs in its most basic configuration. According to another definition, a multiplexer is a combinational circuit that relies on control or select inputs and has numerous data inputs and a single output. There are different types of mux but the major types of mux are: 1. 2:1 Mux 2. 4:1 Mux But in here i only show you how 2:1 Mux works because 4:1 Mux has similar function but more inputs than 2:1 Mux. Nevertheless, i will explain about that. 2:1 Mux A basic circuit called a 2-to-1 multiplexer, or 2×1, is used to select one signal from two inputs and send it to the output. The output of the 2×1 Mux will depend on the selection line S, -When S is 0(lo...