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Get a specific frequency from various crystals & divisors

by roboticus (Canon)
on Feb 16, 2013 at 18:29 UTC ( #1019055=CUFP: print w/ replies, xml ) Need Help??

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  1. or download this
    # Crystals, Oscillators & ceramic resonators.  All freq in MHz
    # TODO: find way to specify tolerance: currently just using stated fre
    +quency
    ...
    RES     7.37        # ? "737 Cm 219"
    RES     10.7
    RES     16.93
    
  2. or download this
    actualFreq (error) = startFreq / divisor "div =" factors
    
  3. or download this
    $ ./find_xtal.pl 175k k5
    
    ...
        174,536 (    464) =  16,930,000 /   97  div = 97              
        175,476 (    476) =   7,370,000 /   42  div = 2 * 3 * 7       
    
  4. or download this
    #!/usr/bin/perl
    my $usage = <<EOHDR;
    ...
    
        return @factors;
    }
    

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