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 ...

Provides 1 input & 4 output ports, each optically isolated RS232 or RS485, with status LEDs. Up to 16 DIGI*TRAC controllers per output port. Cascading supported (2 levels deep). Includes enclosure, ...