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BCD UP/DOWN COUNTER

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by D'COUNCILOR, Aug 10, 2002.

  1. D'COUNCILOR

    D'COUNCILOR New Member

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    Good day everybody!

    I'm building the digital up/down counter using CD4510 as the counter with CD4511 as the display driver (7 segment). My problem is, I only needs the counter to count from 6 to 0. In short I would like to shorten the count from 9 to 6. Can anybody give me an idea on how to shorten the counting of CD4510? I REALLY APPRECIATE ANY HELP THAT YOU MAY EXTEND TO ME.
    THANK YOU VERY MUCH IN ADVANCE.


    D'COUNCILOR
     
  2. Prof.Insane

    Prof.Insane New Member

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    Remove a bit

    I dont know which circuit you are using so this may not work. Disconnect bit 4 (the one representing an 8) from your display driver and connect this to the reset of your BCD. That should work.
     
  3. D'COUNCILOR

    D'COUNCILOR New Member

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    Hello!

    Thank you very much PROF. INSANE for your suggestion and I will try your suggestion. But for your reference and may be you can give me more accurate suggestion regarding my problem, I got the circuit from BOWDEN'S HOBBY CIRCUIT. The title of the circuit is "9 SECOND DIGITAL READOUT COUNT DOWN TIMER". The website is
    HTTP://OURWORLD.COMPUSERVE.COM

    I'll wait for your response again.

    Thank you and more power.

    D'COUNCILOR
     
  4. dave

    Dave New Member

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  5. Prof.Insane

    Prof.Insane New Member

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    Yup.

    Now ive seen the circuit, I can see how it works. Disconnect pins 3 and 4, and ground these. Connect pins 13, 12 and 4 to +12V, this tells the counter to start at 6 instead of 9.

    All done now.

    http://ourworld.compuserve.com/homepages/Bill_Bowden/page2.htm#delay10.gif

    Best of luck,

    -Chris.
     
  6. D'COUNCILOR

    D'COUNCILOR New Member

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    GOOD DAY CHRIS :)

    Thanks again for your response. I do really appreciate your help and I will try it later.

    More power!


    D'COUNCILOR
     

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