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32 khz clock signal

Discussion in 'General Electronics Discussion' started by parkie, Apr 23, 2010.

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  1. parkie

    parkie

    1
    0
    Apr 23, 2010
    Hello, i am wanting to know how to clock down a 32 khz clock to 16khz?

    I am not sure if there is a quick and simple way to do this

    reason is i have an amega328 running arudiuno and i am taking it off the prototyping board and putting it into a final product, but i only have a 32 khz or 8 khz clock here with me

    So is there a way to clock down the 32 or clock up the 8?
    or does it matter if i run the amega328 at a faster clock?
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,298
    2,736
    Jan 21, 2010
    If the amega328 (and the software on it) can handle the higher clock rate, then there is no problem.

    Dividing the clock by 2 is the easiest and can be done with a single flip flop.

    Check out this and this.

    There are simple devices that consist of a single D type flipflop that you could use in a minimum of board space. A NC7SZ74K8X is one option (I suggest this only because I have some of them) -- there are many other options.

    edit: OK, 32kHz, not 32MHz. It would be no problem for the amega328, the issue would be if the software was designed specifically for the slower clock speed.
     
    Last edited: Apr 23, 2010
  3. vk5ajl

    vk5ajl

    8
    0
    Feb 1, 2010
    As mentioned above, a D flipflop makes it easy to divide by 2. One commonly available chip is a half of a 74hc74. Connect the inverting output (Q bar), to the D input, the clock to 32kHz or whatever then take the output from either the Q or Q bar output. Perfect divide by 2 and by two again with the other half of the chip if you want.
     
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