Searching \ for '14000: weird or wonderful?(was: 14000 headaches)' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/index.htm?key=14000+headaches
Search entire site for: 'weird or wonderful?(was: 14000 headaches)'.

Truncated match.
PICList Thread
'14000: weird or wonderful?(was: 14000 headaches)'
1999\01\20@151912 by Dave Johnson

flavicon
face
I've heard from a few folks that the 14000 is "weird" (direct quote) and
not really recommended, but the specs make it look wonderful for the
kinds of things I like to do.

So what's the real deal? I guess to answer that fully I need to get one
and start whacking at it, but I'd be interested in other's opinions.
Private email encouraged, unless you think this is of general interest.

Dave Johnson

1999\01\20@155610 by William M. Smithers

flavicon
face
On Wed, 20 Jan 1999, Dave Johnson wrote:
> I've heard from a few folks that the 14000 is "weird" (direct quote) and
> not really recommended, but the specs make it look wonderful for the
> kinds of things I like to do.

Both weird and wonderful.  I chose it for the
high-res on-board A/D, and the on-board temperature reference,
which I figured would save hardware cost and real estate.  However,
there's a fair bit of code required just to calibrate and
operate the A/D.  If you pay some attention to controlling noise,
the A/D seems good to about 3 bits at 16-bit resolution.

I'm also currently seeing about 9 bits of
drift over a period of several hours.  This may be due to unstable
Vcc, I've got to check, but it doesn't appear to be temperature
related.

Then there's the clock issue, and the fact that they programmed the
calibration constants into EEPROM, rather than blowing fuses at
the factory, so you have to write down all the constants, label
each unit, then re-enter the constants each time you program a
chip - that's a total PITA.

If I had it to do over again, I would use another
PIC and just go with an off-board A/D and thermistor.

-Will

1999\01\20@160621 by paulb

flavicon
face
William M. Smithers wrote:

> If you pay some attention to controlling noise, the A/D seems good to
> about 3 bits at 16-bit resolution.

> I'm also currently seeing about 9 bits of drift over a period of
> several hours.

 Boy, I *really* hope you *don't* mean "bits" in those quotes.
(Counts)
--
 Cheers,
       Paul B.

1999\01\20@162321 by William M. Smithers

flavicon
face
On Thu, 21 Jan 1999, Paul B. Webster VK2BZC wrote:
> William M. Smithers wrote:
>
> > If you pay some attention to controlling noise, the A/D seems good to
> > about 3 bits at 16-bit resolution.
>
> > I'm also currently seeing about 9 bits of drift over a period of
> > several hours.
>
>   Boy, I *really* hope you *don't* mean "bits" in those quotes.
> (Counts)

Yep, bits is what I'm seeing, after averaging 16 samples.  That's
up to 8 counts per reading, and around 500 counts in the drift
department.  I'm fine with the effective 13-bit resolution, but
the drift has me more than a bit worried right now.  Like
I said, it very well may be Vcc related.  I'll post when I know
for sure.

-Will

1999\01\21@024623 by Jim Robertson

flavicon
face
At 15:48 20/01/99 -0500, you wrote:

>Then there's the clock issue, and the fact that they programmed the
>calibration constants into EEPROM, rather than blowing fuses at
>the factory, so you have to write down all the constants, label
>each unit, then re-enter the constants each time you program a
>chip - that's a total PITA.

Or you could use my programmer software that will save
(one time operation) and automatically reinsert the calibration stuff for
you each time you program a JW part.

You only then need to label each part A, B, C etc and either use them
in sequence or simply select the matching "virtual" device depending
on which software driver you are using.

BTW Was is "PITA"? (I thought it was some sort of bread.) :-)

Jim



>
>If I had it to do over again, I would use another
>PIC and just go with an off-board A/D and thermistor.
>
>-Will
>
--------------------------------------------------------
Jim Robertson
Email: spam_OUTnewfoundTakeThisOuTspampipeline.com.au

http://www.pipeline.com.au/users/newfound
--------------------------------------------------------

1999\01\21@042923 by Lee Jones

flavicon
face
>> label each unit, then re-enter the constants each time you
>> program a chip - that's a total PITA.

> BTW Was is "PITA"? (I thought it was some sort of bread.) :-)

In the non-food category (confirmed by context), PITA
has been used as shorthand for Pain In The Ass.

                                               Lee Jones

1999\01\21@222210 by Blutfort at Iserv

picon face
I coded a database for a client once where they had a blank field that would
contain a space or a "p".  If the "p" was present $25.00 was added to the
miscellaneous overhead line item in the billing.  I assumed the p was for
PITA!

{Original Message removed}

1999\01\22@082054 by Morgan Olsson

picon face
At 22:22 1999-01-21 -0500, you wrote:
>I coded a database for a client once where they had a blank field that would
>contain a space or a "p".  If the "p" was present $25.00 was added to the
>miscellaneous overhead line item in the billing.  I assumed the p was for
>PITA!

_P_ostage and _P_acking are both _P_ITA...

And so is the PIC14000 A/D :(
But the project is running and customer happy :)

/Morgan
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   Morgan Olsson                       ph  +46(0)414 70741
   MORGANS REGLERTEKNIK                fax +46(0)414 70331
   H€LLEKS               (in A-Z letters: "HALLEKAS")
   SE-277 35 KIVIK, SWEDEN                   .....mrtKILLspamspam@spam@iname.com
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

More... (looser matching)
- Last day of these posts
- In 1999 , 2000 only
- Today
- New search...