Below is a 2-bit decade counter which outputs 00, 01, 02... up to 99. I have done that in the breadboard but I still haven't done the circuit that will change the timing increment into 2 (once the SPDT switch connected to the output terminal of the 555 timer is pressed) - meaning the output will become 00, 02, 04... up to 98.
I have tried designing a 1-bit even number counter using J K flip-flops. I did the state tables and derived the flip-flop input expressions but all I get when I build the circuit in the breadboard is 0, 1, 2, 3. And from what my friend told me, J K flip-flop circuits are highly unstable so I thought about using D flip-flops. But I'm running out of time and I still can't build the proper circuit. I desperately need your help, sirs and ma'ams. Thank you very much.
I have tried designing a 1-bit even number counter using J K flip-flops. I did the state tables and derived the flip-flop input expressions but all I get when I build the circuit in the breadboard is 0, 1, 2, 3. And from what my friend told me, J K flip-flop circuits are highly unstable so I thought about using D flip-flops. But I'm running out of time and I still can't build the proper circuit. I desperately need your help, sirs and ma'ams. Thank you very much.