It is required to design a two-way traffic light controller as shown in figure 1. The controller has the following specifications:

It will light green for 30 sec in the main street, and in the same time, red in the side street
Then, it will light red in the main street for 30 sec, and in the same time, green in the side street.
The system does not use a seven-segment display to show the count for the two states.
Rules:
- The system must be designed using logic circuits and gates NOT microcontrollers.

 

Welcome to AAC!

You didn't post the figure. Does it have any relevant details?

Since this is homework, what are you ideas for a solution?

 

Most traffic light problems include a yellow light; are you relieved of that requirement?

According to the problem statement, something needs to happen every 30 seconds. Is your clock source adjustable to make that happen, or do you need to generate the 30 second interval from some other clock frequency?

 

Design a synchronous counter counts the sequence of your ID number from left to right. Your full identification number (each number separately) is displayed on a seven-segment unit for a second, so that the first four numbers are displayed through the counter and then the rest of your number is displayed. During the display, the fourth number from the left will be recognized in your ID (to define the year you join the academy) by means of a decoder that gives an alarm (Buzzer tone) for 4 seconds and then completes the display of the rest of your number. Each number is displayed on a seven segments unit for a second, the clock must be designed to has a periodic time of 1 second The design recognizes if your number is odd (a green LED lights up) or even (a yellow LED lights up). The design decides if the year of joining the academy before 2018 (then lights up a blue LED), or if 2018 and beyond (then lights up a red LED).

 

Post your work and your ID number.