Question

PROBLEM: Designing a traffic light using a D f/f state 0 (R/R) state

1 (G/R) state
2 (Y/R) state
3 (R/R) state
4 (R/G) → state
5 (R/Y);
6 states (000 - 101)

Answer 1

The traffic light design using a D flip-flop involves six states: 0 (R/R), 1 (G/R), 2 (Y/R), 3 (R/R), 4 (R/G), and 5 (R/Y). The binary representation of these states is 000, 001, 010, 011, 100, and 101, respectively.

Step-by-step explanation:

In this design, a D flip-flop is utilized to represent the different states of the traffic light. Each state corresponds to a specific combination of the Red (R), Green (G), and Yellow (Y) lights. The binary representation of these states is used to determine the inputs to the D flip-flop.

State 0 (000 - R/R): This is the initial state where only the Red light is illuminated.

State 1 (001 - G/R): Transition to the Green light.

State 2 (010 - Y/R): Transition to the Yellow light.

State 3 (011 - R/R): Return to the initial state with the Red light.

State 4 (100 - R/G): Transition to Red/Green, allowing traffic from the opposite direction.

State 5 (101 - R/Y): Transition to Red/Yellow, preparing for a return to the initial state.

This sequential state transition ensures a proper traffic light operation. The binary representation simplifies the control logic, making it more manageable and efficient. The use of a D flip-flop facilitates the sequential switching of lights based on the binary encoding of the states, creating a reliable and straightforward traffic light design.