[time-nuts] 1Mhz to 1 PPS

[Rix Seacord]

Jeff
If you do a web search for frequency divider or standard, there are
several good home brew type projects that are relatively simple and
straight forward.
Below are some of the sites I have visited. The first 2 explain more on
the tech end and the last is a public domain schematic of a relatively
simple divider. 2 more dividers would have to be added to get 1pps with
a 1mhz input. I've seen the 390 chip used elsewhere and seems to work
without a bunch of external components.
Of course, all vcc lines to the chips should have capacitors to ground
on all the chips. These are not normally shown or maybe they didn't use
them.

http://www.play-hookey.com/digital/
www.techlib.com/files/dividers.pdf
http://www.g7ltt.com/10mhz/freqstd3.jpeg

Good Luck
Rix


-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of jshank
Sent: Tuesday, November 27, 2007 8:23 AM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] 1Mhz to 1 PPS

Hi,
I would like to convert a 1 MHz sine wave to a 1 pps TTL.  

Any suggestions?

Thanks,

Jeff
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