Asynchronous Counters

[rockienj]

Please help me to solve following question Asynchronous Counters with proteus
1. 0-1-2-3-4-5-6-7-8-9-10-11-12-13 (13 stop)
2. 0-1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-11-12-13-14-15-..

 

[FvM]

Presume you are intending simulation with DFF components. Asynchronous implementation of specific count sequence shall be performed by set/reset inputs?

 

[BradtheRad]

To stop at a given number, determine what is its binary pattern that appears at the BIT outputs. (Four bits are sufficient to count to 15.)

Then fashion a method to create this same bit pattern (using diode-and-resistor networks). Explect to need a 4-input AND-gate, possibly invert-gates.

Fashion a method to disconnect the incoming clock when your preferred number appears. The count stops at that number.