In a message dated 21/07/2005, gcouger@.......... writes:

The 5  volt one Hz signal off a Rockwell Jupiter or many other GPS receivers 
makes an  ideal heart beat for a clock for an microcomputer. If you need finer 
 granularity a divider or phased locked loop on the 100 kHz output is a bit  
harder to build but 
is easier than a VLF radio.

Both your way with  WWV VLF and a GPS have their place. But with GPS 
receivers with one second  clock pins selling for 25 to 50 bucks new in the box it is 
hard to see why any  one would go to the effort to use VLF unless there were 
problems that  precluded using a GPS.
Hi Gordon,
 
    You need the timing pulses and the data stream to  set the system clock.
 
     Larry sells a 2nd hand GPS, aerial and  interface board for $140. You 
need all three. 
 
    Please DO tell me where I can get this  for $50, new, or even second hand?
 
    Regards,
 
    Chris Chapman

 





In a message dated 21/07/2005, gcouger@.......... writes:
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  volt one Hz signal off a Rockwell Jupiter or many other GPS receivers make=
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  ideal heart beat for a clock for an microcomputer. If you need finer=20
  granularity a divider or phased locked loop on the 100 kHz output is a bit=
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  harder to build but 
is easier than a VLF radio.

Both your way w=
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  WWV VLF and a GPS have their place. But with GPS receivers with one second=
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  clock pins selling for 25 to 50 bucks new in the box it is hard to see why=
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  one would go to the effort to use VLF unless there were problems that=20
  precluded using a GPS.
Hi Gordon,
 
    You need the timing pulses and the data stream=20=
to=20
set the system clock.
 
     Larry sells a 2nd hand GPS, aerial a=
nd=20
interface board for $140. You need all three. 
 
    Please DO tell me where I can get t=
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for $50, new, or even second hand?
 
    Regards,
 
    Chris Chapman