ring D-flip flop

Thread Starter

mohsen

Joined Oct 24, 2008
37
how can i do Ring D-flip-flop that do the circle right to left and then do it left to right

i tried to to right to left first but the last indicator doesn't light at all cuz i rest it when it reach to the last flop? is there a solution please help
 

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Georacer

Joined Nov 25, 2009
5,182
You have connected all the Clear pins to the Q' pin of the last flip flop. Consequently, when the last FF goes high, that pin goes low and resets all the FFs.

Connect the Clear pins to Vcc, not Q'.
 

Thread Starter

mohsen

Joined Oct 24, 2008
37
well they never go clear when i connect them to vcc
also if anyone know how to do the ring move from the left to the right
 

Georacer

Joined Nov 25, 2009
5,182
Why do you discard an answer without at least reading it properly? I said they clear only when the last flip flop tries to go HIGH because it gives a LOW signal at its Q' ouput. Clear inputs are triggered by a LOW signal, as the dot in its pin implies.
 
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