Level Trigger vs Edge Trigger

Question

Problem: Level Trigger vs Edge Trigger. Solve this hands-on electronics task on EWskills.

Accepted Answer

The fix is, replace the level trigger latches with edge trigger flip flops.

The issue occurs because the circuit uses a D latch, which is a level-triggered device.
The push button is connected to the Enable input of the D latch.
When the button is held down, the latch remains transparent.
During this time, the up-counter continues counting with every clock pulse.
Hence, the latch continuously stores the changing counter values instead of a single value.
The final stored number is the value present when the button is released, not when it was first pressed.
Modify only the D latch section of the circuit.
Replace the D latch with a positive edge-triggered D flip-flop. Flip Flops have ">" input instead of "IE".
The flip-flop captures the counter value only at the rising edge of the button signal.
Therefore, only one number is stored per button press, irrespective of how long the button is held.
Result: The game now correctly records a single random hex number for every button press.

63. Level Trigger vs Edge Trigger