ds1302

Archiver

I'm using a bs2 with a ds1302 real time chip. I'm using a
32,7680KHZ crystal and it keeps perfect time. My question is:
Is there any way to determine a different size crystal so that the
time that is kept is approximately 4 minutes fast every 24 hours.

Archiver

> I'm using a bs2 with a ds1302 real time chip. I'm using a
>32,7680KHZ crystal and it keeps perfect time. My question is:
>Is there any way to determine a different size crystal so that the
>time that is kept is approximately 4 minutes fast every 24 hours.

Hi Charlie,

Sidereal time for your telescope? There are 1440 minutes in a 24 hour day.
32768*1444/1440 = 32859
You could certainly special order it, but I don't know where you
could find it off the shelf. A tuning capacitor will allow you to
adjust +/- only a few seconds per day.

-- Tracy

Archiver

Hello

Has anyone got any code for the DS1302 or anyother serial Dallas RTC?

I will be very grateful.

Regards

Ashfaq Juna

Archiver

In a message dated 08/28/2002 12:08:52 Eastern Daylight Time,
ashfaqjuna@y... writes:


> Has anyone got any code for the DS1302 or anyother serial Dallas RTC?
>
> I will be very grateful.
>
> Regards
>
> Ashfaq Juna
>
>
>

For Ashfaq

Go www.parallaxinc.com and download theier code for the DS1302 Application.
Everything is there.


Sid Weaver - W4EKQ

<> <> <> <>
Your assumptions are probably incorrect, unless, of course, they agree with
mine.


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Archiver

There is a bunch of code available for the DS1302. You can find code and
documentation on the Parallax web site and samples in my personal code folder:

http://members.aol.com/jonwms/stamps


-- Jon Williams
-- Parallax

In a message dated 8/28/02 11:08:32 AM Central Daylight Time,
ashfaqjuna@y... writes:


> Has anyone got any code for the DS1302 or anyother serial Dallas RTC?
>
>




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