In this issue of Hackaday Dictionary, we cover the multiplexer and demultiplexer (also called mux and demux). They are essentially opposites but they work on the same principle. There are three parts: ...

It’s possible to use an 8:1 multiplexer to implement any 3-input logical function, but can we use it to implement a 4-input function? On the one hand, some logic problems never seem to go away. On the ...

In this article, we will clarify how to build a bidirectional 2-bit mux circuit that can be used with I 2 C lines. The circuit also has the extra functionality of operating as a level shifter, if ...