how to reset a divide by 6 counter to 0000?

Discussion in 'Homework Help' started by perscore, May 26, 2009.

  1. perscore

    Thread Starter New Member

    May 11, 2009
    7
    0
    hi,i do have a problem in reseting my counter.i do configure 7490 to count 0-1-2-3-4-5 by connecting pin number 2 to pin 9,pin number 3 to pin 8,pin 6 and pin 7 to ground,pin number 1 to pin 12,and pin number 14 to external clock and it works perfectly,i do want to reset it to 0000 by put a switch in such away when i close a switch it resets to 0000 but when i open a switch it counts as normal,could anyone help me?thanks
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,535
    Schematic please? Verbals leave too much open, pictures are unambiguous.
     
  3. perscore

    Thread Starter New Member

    May 11, 2009
    7
    0
    below is my attachment,thanks for your help
     
  4. perscore

    Thread Starter New Member

    May 11, 2009
    7
    0
    how to reset the attached configured divide by 6 counter?
     
  5. gryskop

    Member

    Mar 1, 2008
    26
    0
    Have you tried reading the 74LS90 datasheet?

    Pins 2 and 3 are the reset pins. You'll need to OR gate them with a master reset input.
     
  6. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,535
    Dumb question time, why didn't you use a 7492, which is a divide by 6 or 12 counter?

    Have you trying switching pin 6 or 7 high? Those are the reset pins.
     
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