[time-nuts] Sidereal timekeeping
Brooke Clarke
brooke at pacific.net
Sun May 15 21:39:57 UTC 2011
Hi Antonio:
Another way to do it is to use any common crystal (10 MHz would have
advantages) and a small PIC micro controller to generate the sidereal *
2^15 frequency.
Note this can be done to very high precision.
http://www.prc68.com/I/PIC16F88.shtml#PIT
Have Fun,
Brooke Clarke
http://www.PRC68.com
iovane at inwind.it wrote:
> Hi all,
> does anybody out there have any ideas as where to find a 32859Hz crystal (1/2
> that value would be better) to be used to replace 32768 crystals in ordinary
> clocks? I think that 32768 crystals cannot be dragged that much. I've already
> read the JimLux article somewhere on the web, but I would be pleased finding a
> simpler solution. Also, I already have computer programs that show sidereal
> time.
> Thanks,
> Antonio I8IOV
>
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