Before we investigate the multiplexer, let us first analyze a simple "decoder." If you imagine this component with 8 inputs, you could easily imagine it then having 256 outputs, which is a lot of transistors and lights just to put a number on the screen. Even worse if it were to be 16 inputs (65536 outputs). The bad news is, such things exist. The good news is, you only have to understand this simple one and figure out how you could expand it.



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