dividing frequency from d flipflop

Discussion in 'The Projects Forum' started by brandonb, Nov 27, 2010.

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  1. brandonb

    Thread Starter New Member

    Nov 14, 2010
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    how you guys doing(first post) i have a hcf4013be d-flipflop that i bought 15 from digikey- im trying to make a frequency divider out of it, when i hook it up like i've seen on the web to do the above it only gives me battery voltage, is my frequency too low at 5-50hz or am i not using the correct dflop....if i read the datasheet correctly it says that its possible- so tell me what you think? HOOK UP-dc 12v 25% duty frequency signal input to clock pin- d jumped to qnot- clear and reset not connected- q output always batt voltage for somereason....12v supply hooked up to chip,
     
  2. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
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    They're static so they work from DC to whatever their rated speed is.
    Post the schematic you used.
     
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  3. beenthere

    Retired Moderator

    Apr 20, 2004
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    Not only the schematic, but the kind of logic you are using. Only 4000 series CMOS will take +12 VDC without blowing up.
     
    Last edited: Nov 27, 2010
  4. Wendy

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    Mar 24, 2008
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    Last edited: Nov 27, 2010
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  5. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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    Datasheet for HCF4013
    Static Dual D FF
    It is rated for up to 15V Max speed of 16Mhz. For a multi stage frequency divider, I'd suggest a CD4040 or similar, I made a thread on that just a few days ago (kid project).
     
  6. Wendy

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    Mar 24, 2008
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    Which I'm currently helping on, between peeks at the board.
     
  7. beenthere

    Retired Moderator

    Apr 20, 2004
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    This turned out to be a circuit to affect fuel injection in an automotive engine.
     
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