MadeEasy Subject Test 2019: Digital Logic - Flip Flop

Question

A traffic signal cycles from RED to YELLOW, YELLOW to GREEN and GREEN to RED. In each cycle RED is turned for 100 seconds, YELLOW is turned for 40 seconds and GREEN is turned for 80 seconds. The traffic has to be implemented using FSM. The only input to this FSM is a clock of 10 second period. The minimum number of flip-flops required to implement this FSM is?

Comments

The one which @Shubhgupta  mentioned.

---

@Parth Shah, in question clock cycles are not given they have given how much amount of time yellow, red and green light can be turned on. So you need to find clock cycle for one complete cycle which I did in my approach.

---

Yes, I got your point and that's what I have done in my approach mentioned above. I have calculated the clock cycles and then I have calculated the minimum number of flip-flops required.