counter frequency division

Discussion in 'General Electronics Chat' started by perscore, May 15, 2009.

  1. perscore

    Thread Starter New Member

    May 11, 2009
    7
    0
    wil my system work perfectly as i want 1Hz frequency from 1MHz frequency cystal oscillator if i use two dual decade counter(74390)?
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,645
    2,344
    Hello,

    If you want 1 Hz from the 1 MHz, you will have to divide by 1000000.
    This can be done by 3 X 74390.(each can divide by 100).

    Greetings,
    Bertus
     
  3. perscore

    Thread Starter New Member

    May 11, 2009
    7
    0
    thanx alot,be blessed
     
  4. perscore

    Thread Starter New Member

    May 11, 2009
    7
    0
    is there any other way round to do with that frequency division so as to reduce the hardware?
     
  5. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Why do you want it from 1 MHz crystal?
     
  6. DonQ

    Active Member

    May 6, 2009
    320
    11
    An 8-pin PIC, like the 12C508, and a trivial program, would be able to do this easily.

    It has the advantage of the only hardware being an 8-pin chip (I do not mean 8 pins on each side, 4-pins on each side, 8 total pins). It has the disadvantage of needing to be able to program the chip, but they are easy to program. Once you learn how, there are lots of things you will then be able to do.


    Another way to get a 1Hz signal is to use a 32.768kHz crystal (kilo-Hertz, not mega). Then use a binary divider to get 1Hz.
     
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