Pulse without a 555 and a Counter issue.

Discussion in 'The Projects Forum' started by haxxx, Feb 28, 2009.

  1. haxxx

    Thread Starter Active Member

    Feb 14, 2009
    35
    0
    1.)When my counter IC (4029)counts from zero to one pin 7 Goes high (7.5v)
    I want to use that rising edge to pulse a second circuit. Is there any other way to get a pulse other than using the 555, if not is it okay to invert that pin 7 output and go straight to pin 2 Of the 555.
    2.) Also another little problem, A backward count from zero to nine also makes pin 7 go high. I understand y it happens based on the counters 4 outputs but is there any way around it, that is: “zero to one: yes” “zero to nine: no”.

    Thanks,
    Haxxx.
     
    Last edited: Feb 28, 2009
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Post your circuit's schematic, preferably in .PNG format.
     
  3. haxxx

    Thread Starter Active Member

    Feb 14, 2009
    35
    0
    I based it on the attached circuit but i want to use pin 7 on the 4029 to pulse a relay when the count moves from zero to one. and preferrably not
    when it counts backwards from zero to nine.
    Thanks.

    Haxxx
     
  4. SawabyPlus

    Member

    Feb 27, 2009
    14
    0
    u can AND pin 7 and the up/down' signal so that gate output doesn't go hi unless counting upwards
     
  5. haxxx

    Thread Starter Active Member

    Feb 14, 2009
    35
    0
    Thanks a lot man, any solutions for part one of the question.

    Haxxx
     
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