I need to design a circuit with D Flip-Flops which counts 1-6-0-5 for 3 times and 2-3-7-4 for 2 times. Can anyone help? I've never seen any example like this one . I tried Module counter but couldn't control the 3 times and 2 times. How can I solve it?

 

The first thing to do is to describe what this Counter is supposed to do.
The next thing is to provide us with a Schematic-Diagram so
that we can see how You are attempting to accomplish this end result.
( there may be other solutions )
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Is this an exercise in designing an FSM (Finite-State Machine)?
If it is, then the approach is to write out a table of all possible states. If you don't know how to do this we can assist you.

 

Is this an exercise in designing an FSM (Finite-State Machine)?
If it is, then the approach is to write out a table of all possible states. If you don't know how to do this we can assist you.

Actually I don't know, the question was just the exam question of the past years. I'm writing down the whole question :
The MN flip flop truth table is given. If the control variable X, including ABC flip-flop names and outputs, is 0 (X=0), then 4-5-6-0-4-5-... ; If the control variable X is 1 (X=1), then 1-2-3-7-1-2-... if the state changes in the form and decimal AB <= 1 (binary, AB <= 01), the output variable Y is Y=0, if not Y=1
design a sequential logic circuit that takes value as. When the X switch changes state, the counting process should start from the initial value of the corresponding series. In the table, Q' shows the inverse of Q.

Question = Design a circuit that moves 4-5-6-0 for 2 times; 1-2-3-7 for 3 times. The truth table is here :

 

You will have to write out the total sequence:

4-5-6-0-4-5-6-0-1-2-3-7-1-2-3-7-1-2-3-7

Hence, in total there are twenty unique states. You will need, at minimum, a 5-bit counter.

 

You will have to write out the total sequence:

4-5-6-0-4-5-6-0-1-2-3-7-1-2-3-7-1-2-3-7

Hence, in total there are twenty unique states. You will need, at minimum, a 5-bit counter.

I mustn't use 5-bit counter. There should be any other control. that's what they want in the question