Question

Write a documented program that will cause an output pilot light (PL) to be on when an on/off selector switch selector switch(SS) is in the on (Closed Position), a normally open pushbutton (PB) is depressed, and a normally open limit switch (LS) is closed.

Answer 1

As it is not mentioned which language needs to be used, I am writing a C program with few assumptions

Selector switch SS = 1 when on(Closed position)

Push button PB = 1 when depressed

Limit Switch LS = 1 when closed

Pilot Light PL = 1 when ON

This is simply an logic AND operation to check if all the variables are at logic 1 i.e. ON

If you are using any board, you can check respective input pins for logic 1 instead of the scanf function used here and setting the output pin to 1

If you need code in verilog or VHDL, then use AND gate with 3 inputs

#include<stdio.h>

main()

{

int SS, PB, LS;

int PL = 0;

printf("Enter the status of Selector Switch:");

scanf("%d", &SS);

printf("Enter the status of Push Button:");

scanf("%d", &PB);

printf("Enter the status of Limit Switch:");

scanf("%d", &LS);

if(SS == 1)

{

if(PB && LS)

{PL = 1}

}

}