reset for J-K flip flop bcd counter

Discussion in 'Homework Help' started by jepoy, Feb 23, 2011.

  1. jepoy

    jepoy Thread Starter New Member

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    I made a counter using this design and it works fine.[​IMG]
    and now Im planning to make a reset button for it but I don't know how to do it. I already looked at the j-k flip flop datasheet and read its truth table then tried changing the J or K input to "0" but it didnt reset.
    Need help here. ( ;
     
    #1
  2. Georacer

    Georacer Moderator

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    Pins 3 and 8 of the 7476 are clear pins activated on LOW. They work asynchronously. Try them out.
     
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  3. jepoy

    jepoy Thread Starter New Member

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    I tried but it only pause the counting.
    should I do it on all 7476 IC's?
     
    #3
  4. jepoy

    jepoy Thread Starter New Member

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    nvm...
    thanks for the help great man Geo. ( ;
     
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  5. Georacer

    Georacer Moderator

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    Yes, as I guess you found out, you must reset all 4 JK-FFs simultaneously for the counter to return to 0.
     
    #5
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