DS1726 in PBP

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- 11th February 2007, 18:18
Hainkm

DS1726 in PBP

Hi!

I'm working with a DS1726 (program same as a DS1626) trying to get this thing to read Fahrenheit temperatures.

Does anyone have any code examples? I can't seem to find out a lot about this chip.

I thought about changing over to the DS1820 via 1-wire, but I see it's obsolete now?

Here's what I'm looking for:

Temp sensor with 12-bit resolution (well, 11 plus sign bit), SPI or 1-wire, plus some sample code to help me get started.

THANK YOU!!!
Kris
- 11th February 2007, 19:57
skimask

Quote:

Originally Posted by Hainkm

Hi!

I'm working with a DS1726 (program same as a DS1626) trying to get this thing to read Fahrenheit temperatures.

Does anyone have any code examples? I can't seem to find out a lot about this chip.

I thought about changing over to the DS1820 via 1-wire, but I see it's obsolete now?

Here's what I'm looking for:

Temp sensor with 12-bit resolution (well, 11 plus sign bit), SPI or 1-wire, plus some sample code to help me get started.

THANK YOU!!!
Kris

Plenty of DS1820 types still out there.
Obsolete? Maybe only because the company has a 'new, improved' version. Nothing wrong with the old one...
http://www.digikey.com/scripts/DkSea...S&Cat=33359008
- 11th February 2007, 23:46
Darrel Taylor

Hi Kris,

Only the original DS1820 is obsolete.

It was replaced with the DS18S20, which does the same thing, just in a better way.

And there's still the DS18B20. (12 bits)
Lot's of code in the forum for the DS18B20.
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- 12th February 2007, 01:00
Hainkm

Ds18b20

Thanks! I'll look into getting a few of those and hopefully will have some better luck!!

Thank you!!
Kris
- 12th February 2007, 01:29
Darrel Taylor

Great!

And, for the DS18B20, see this link

-- A Simple "High Precision" --
-- 1-Wire Temperature Application --
http://rentron.com/PicBasic/one-wire3.htm
Bruce also sells the DS18B20, so you won't need to look too far.

Regards,
- 17th February 2007, 16:16
Hainkm

Getting closer...

Ok, I got myself a DS18B20 and used the code above, works like a champ!

Now...does anyone have an easy way to get a 1-decimal point reading when we're below 32F? (when it goes below 0c, it truncates the F reading to whole numbers only)

Thanks for all your help!!
Kris
- 18th February 2007, 06:44
Archangel

Quote:

Originally Posted by Hainkm

Ok, I got myself a DS18B20 and used the code above, works like a champ!

Now...does anyone have an easy way to get a 1-decimal point reading when we're below 32F? (when it goes below 0c, it truncates the F reading to whole numbers only)

Thanks for all your help!!
Kris

Look at Bruce's math expressions in the yikes sub directory, look at how he did it for degrees C using the DIG modifier, I think thats how it's done. Understand I'm still feeling stupid here so don't trust me, but I really think it is the DIG 3 or DIG 4 modifiers doing it, so check the manual 4.17.7 DIG page 33.