You are modeling the lights for a small northsouth road maki

You are modeling the lights for a small north/south road making a T junction with a larger east/west road. There are two sets of lights: Red, Yellow, Green for the East/West-bound traffic, and Red, Yellow, Green for the northbound traffic. The light normally stays green for the East/West street unless a northbound car activates a switch. Let\'s say, for simplicity, that red lights last for 4 seconds, green for 2 seconds, yellow for 1 second. The state diagram for this problem looks like this: Objective Your objective is to design and construct a digital circuit to control these traffic lights. Your circuit will have one input (is a northbound car waiting) and six outputs: on/off for each light on the two traffic signals.

Step 1: Truth Table Design a transition truth table for this traffic light controller. Your table should have 4 inputs (1 switch, 3-bit current state) and 9 outputs (3-bit next state, 6 lights).

Step 2: Equations Make the full Sum-of-Products logic equations. There should be nine of them.

Step 3 (optional but strongly encouraged): Simplify Simplify the equations as much as you can.

Solution

you are modeling the lights for a small north road making a t junxtion with a larger east road

tere are two sets of lights rea yellow green for the east bound traffic

east street nless a north bouds car activates a switch the states diagram for this problem

your circuit will have one input and six outputs on offfor each light on the two traffc signls