= Multiplexer =

Combines several signals into one

Consists of 
* An output
* _n_ inputs, 
* log,,2,,(_n_) selectors

This alone allows us using the selectors, to choose which input

This is best shown with a 2 input multiplexer, which only needs 1 selector

{{{
in0 |---|
----|   |Out
in1 |   |---
----|   |
    |---|
      |
 sel  |
}}}

| sel | output |
|-----|--------|
| 0   | in0    |
| 1   | in1    |

And thats all there is to it. This scales up with several inputs, 
several selectors, and one output

[[electronics]]