Question

You have a 3-to-8 line decoder, an 8-to-3 priority encoder, an 8-channel multiplexer, and an 8-channel demultiplexer. Which would be most appropriate to use in each of the following situations.

1. A 6-position rotary dial provides an active signal on exactly one of its 6 outputs at a time. You want to use fewer wires to represent the switch position.

2. A digital signal from a microphone needs to be routed to one of seven classrooms so that you can make announcements to each room individually

3. A weigh station on a highway routes incoming trucks to one of five booths. They want to use a binary number 1-5 to light an indicator on the booth that should be used next.

Answer 1