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Presettable CD4510 BCD up/down counter

Discussion in 'Electronic Basics' started by [email protected], Oct 19, 2006.

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  1. Guest

    Help needed on how to preset the CD4510 BCD up/down counter to any
    digits. I am looking
    for a 2 digits 7 segment count down timer circuit. Please help.
     
  2. Fred Bloggs

    Fred Bloggs Guest

    Pulse pin 1 high????
     
  3. default

    default Guest

    You would need two of them, and some dip switches or hardwired preset
    inputs to set the "count from" digit. Or if you want to get fancy -
    there are decimal thumb wheel switches that read the digit 0-9 and
    output the BCD code - or you can just get a ten position rotary switch
    and do it yourself with steering diodes.

    The outputs have to be sent to a decoder, driver (can be in a single
    package usually including a "latch" to hold the count input
    temporarily)

    http://www.play-hookey.com/digital/experiments/counter_display.html

    Gives the basics

    Your display driver would depend on whether you want Common Cathode or
    CA display LEDs or an LCD display.

    This stuff is really easy to do - just a few data sheets and some
    think time - and it has been presented in thousands of hobby articles.
    Search.
     
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