Binary counters

Discussion in 'Homework Help' started by ne5pats, Apr 25, 2011.

  1. ne5pats

    Thread Starter New Member

    Mar 5, 2011
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    Hello i need to add more gating to this binary counter i created to construct a decoder that will illuminate a LED when the binary equivalent of 12 is reached. any ideas?
     
  2. t_n_k

    AAC Fanatic!

    Mar 6, 2009
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    Probably a 4-input NAND with x0',x1',x2,x3 [LSB to MSB count bits] as input and the output sinking the LED from +5V
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
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    Think about what the counter outputs look like when the count is 12.
     
  4. ne5pats

    Thread Starter New Member

    Mar 5, 2011
    13
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    the output i get in multisim is like a lowercase u. :/
     
  5. Georacer

    Moderator

    Nov 25, 2009
    5,142
    1,266
    Which output? The NAND's output as proposed by t_n_k? Is that its behaviour during one clock cycle and a tad more? It seems natural to me since you want to get 0 on the count of 12, and the NAND gate does just that, with a bit of capacitive delay of course.

    If you feel you don't get the right result or don't understand the suggestions of the members, please describe your problem more thoroughly.
     
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