ring D-flip flop

Discussion in 'Homework Help' started by mohsen, Nov 28, 2010.

  1. mohsen

    Thread Starter Active Member

    Oct 24, 2008
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    0
    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
     
  2. Georacer

    Moderator

    Nov 25, 2009
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    1,266
    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'.
     
  3. mohsen

    Thread Starter Active Member

    Oct 24, 2008
    37
    0
    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
     
  4. mohsen

    Thread Starter Active Member

    Oct 24, 2008
    37
    0
    is there any solution for my problem!!!!
    please help me
     
  5. Georacer

    Moderator

    Nov 25, 2009
    5,142
    1,266
    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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