How to get DS1302 time & date in ASCII toscratch pad on BS...
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I am leaning toward never using a ds1302 again. Too much ag with crystals. I
purchased a few of the 'high-priced' crystals from Parallax thinking they'd
do better than the $.05 parts I already had. */Not so, still a less than
100% yield - any thoughts on this Jon?/* Next I'll probably just use either
the 4060 method, or a PIC or TI MSP430 & crystal. I did have plans for the
trickle charge feature though.....Hmmmm....
What's the latest consensus on RTC's for use with Stamps? Perhaps a
different chip out of the DS/Max lineup?
Chris
Original Message
From: Beau Schwabe [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=OHFavJCj4ifZSfWK9u35gq2CjRKcghf_E9XjqodXVNPQqK7LbYEzMDBtpQD21M3T541cQ1ZAKjurhPuqfDEsyRw8]bschwabe@a...[/url
Sent: Tuesday, February 12, 2002 2:42 PM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Re: How to get DS1302 time & date in ASCII
toscratch pad on BS...
At 06:14 AM 2/12/02 +0000, you wrote:
>The subroutine works like a charm !
>Thank you,
>Michael
Something to keep in mind and consider, it may not be your code at all.
I found this in the Stamp archives of my own reply...
At 08:35 AM 12/4/98 +0100, you wrote:
>Hi,
>
> I have got a DS1302 , but could not find anywhere a 6pF crystal , and
got a
>12.5 pF one. Will this have any adverse effect on the DS1302 or is there
any way
>to get the capacitance from 12.5pF to 6pF ?
>
>Thanks,
>Kevin
>
Panasonic carries the proper crystal. ...I have a DS1302 also, and they are
VERY
sensitive to the load capacitance. Using an 8pF I had about a 50% yield of
whether
or not the clock would oscillate. Of those that worked I could expect to
loose 4
minutes a day. (2 Hours a month!) Using 12.5pF, about the only thing I
could do
was set the trickle charge, the clock would not oscillate at all.
Beau Schwabe Mask Designer IV - ATL
National Semiconductor Wired Communications Division
500 Pinnacle Court, Suite 525 Mail Stop GA1 Norcross, GA 30071
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the Subject and
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purchased a few of the 'high-priced' crystals from Parallax thinking they'd
do better than the $.05 parts I already had. */Not so, still a less than
100% yield - any thoughts on this Jon?/* Next I'll probably just use either
the 4060 method, or a PIC or TI MSP430 & crystal. I did have plans for the
trickle charge feature though.....Hmmmm....
What's the latest consensus on RTC's for use with Stamps? Perhaps a
different chip out of the DS/Max lineup?
Chris
Original Message
From: Beau Schwabe [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=OHFavJCj4ifZSfWK9u35gq2CjRKcghf_E9XjqodXVNPQqK7LbYEzMDBtpQD21M3T541cQ1ZAKjurhPuqfDEsyRw8]bschwabe@a...[/url
Sent: Tuesday, February 12, 2002 2:42 PM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Re: How to get DS1302 time & date in ASCII
toscratch pad on BS...
At 06:14 AM 2/12/02 +0000, you wrote:
>The subroutine works like a charm !
>Thank you,
>Michael
Something to keep in mind and consider, it may not be your code at all.
I found this in the Stamp archives of my own reply...
At 08:35 AM 12/4/98 +0100, you wrote:
>Hi,
>
> I have got a DS1302 , but could not find anywhere a 6pF crystal , and
got a
>12.5 pF one. Will this have any adverse effect on the DS1302 or is there
any way
>to get the capacitance from 12.5pF to 6pF ?
>
>Thanks,
>Kevin
>
Panasonic carries the proper crystal. ...I have a DS1302 also, and they are
VERY
sensitive to the load capacitance. Using an 8pF I had about a 50% yield of
whether
or not the clock would oscillate. Of those that worked I could expect to
loose 4
minutes a day. (2 Hours a month!) Using 12.5pF, about the only thing I
could do
was set the trickle charge, the clock would not oscillate at all.
Beau Schwabe Mask Designer IV - ATL
National Semiconductor Wired Communications Division
500 Pinnacle Court, Suite 525 Mail Stop GA1 Norcross, GA 30071
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/