2 bits counter with JK ff

Discussion in 'Homework Help' started by zestyphoenix, Dec 9, 2015.

  1. zestyphoenix

    Thread Starter New Member

    Dec 9, 2015
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    Hey guys I need this circuit for my lab assignment tomorrow but I didn't get flip-flops really well. The circuit will count 00-01-10-11(in two seven segment display) when input is 1 and 11 to 00 when input is 0.
    Here is a list of items that I can use:
    ICs: 7400 (NAND gate) (x3), 74109 (KJ F-F) (x3), 7446 (BCD-Seven Segment Decoder) (x2)
     Switch (x3)
     Seven Segment Display (x2)
     470Ω (x8)

    Anybody can post me a circuit that will work?
     
  2. RBR1317

    Active Member

    Nov 13, 2010
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    So have you decided whether to make a synchronous counter or a ripple counter with the J-K FFs?
     
  3. WBahn

    Moderator

    Mar 31, 2012
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    So you don't want to put in any effort at all? You just want someone else to give you a circuit that will work?
     
  4. zestyphoenix

    Thread Starter New Member

    Dec 9, 2015
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    Synchronous counter.
     
  5. MrCarlos

    Active Member

    Jan 2, 2010
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    Hello zestyphoenix
    According to what I understand from what you say is that you were assigned to do an up-down counter 0-3, 3-0 with Flip-Flop's.
    But. . . There are not very well understandable things in your statement:
    Why two Display's ??.
    Are you going you use a switch to the clock pulse ??. You'll need a circuit called de-bounce.
    In the list of items that you can use:
    The numbers in parenthesis are the number of ships or the amount of NAND gates, Flip-Flip's, switches ??.
     
  6. WBahn

    Moderator

    Mar 31, 2012
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    I'm guessing that the two displays is because they want it displayed in binary (of course that can be done very easily without the use of a decoder (or, using a common anode display, without any logic at all provided the FF can sink enough current for four segments).
     
  7. RBR1317

    Active Member

    Nov 13, 2010
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  8. zestyphoenix

    Thread Starter New Member

    Dec 9, 2015
    3
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    Two display because it will be in binary and yes the numbers in parenthesis are the number of that gates.
     
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