The Shop > Electronics & IC Programing

Measuring Temperature

<< < (2/3) > >>

raynerd:
...could the voltage not be linked to a PIC microcontroller and converted to the temperature. Would be a nice project there Rob, you said you fancied trying your hand at PICs when I met you earlier in the year!

Chris

andyf:
Rob, have a look at this:
http://www.johnlewis.com/230335010/Product.aspx
Seems to go up to 320C. At that price, is it worth trying to make your own?

On the KISS principle, rather than building an oven, could you get permission to use the one in the kitchen? The thermometer might still be a good idea though, as oven thermostats can be rather approximate.

Andy

Rob.Wilson:
Thanks lads  :bow: :bow: :bow:

Lots of top ideas  :thumbup:


John ,, Whats a tiffy ?  :scratch:  ,,,,Seebeck effect  :smart:

Dave  :lol: :lol: :lol: :lol:  i needed my beauty sleep  :lol: :lol: :lol:

Hi Chris ,,,,,,,That one for the future  :dremel:, i am saving electronics for winter projects ,when the shops too cold

Hi Andy ,, now why did i not think of that   :clap:  could be the way to go , as this is oven is just a quick knock up job ,, until i can sort out something more permanent for core drying .

The plan was to use the kitchen oven , thats what i normally use ,,,,,,,,,,but the cores for the engine i am working on dont fit   :bang: :bang: :bang:

Thanks Rob  :thumbup:

Bluechip:

--- Quote from: craynerd on May 25, 2010, 06:52:01 PM ---...could the voltage not be linked to a PIC microcontroller and converted to the temperature. Would be a nice project there Rob, you said you fancied trying your hand at PICs when I met you earlier in the year!

Chris

--- End quote ---

Chris

Not so easy ... output is non-linear ... gruesome ...

Once had a large book about various sensors etc. including thermocouples. Absolutely crawling with narky maths ...here is a quick overview ..



http://en.wikipedia.org/wiki/Thermocouple#Voltage.E2.80.93temperature_relationship

EDIT  'Owd on ... looks like a set of calibration tables here

http://www.temperatures.com/tctables.html

Maybe quite do-able if you need a look-up table in the PIC   :thumbup:

Apologies for my pessimism

Dave BC

AdeV:
Why beat yourself about the head doing it in a PIC, when it's already been done with an Arduino, and with some nice'n'easy code no less?

In fact, I did one my very self, for measuring exhaust gas temperature, I did a bit of a writeup here: http://www.microcogen.info/index.php?topic=927.0

The code was only a few lines long, its main task was to read the output from the little black chip (that was the hardest bit of the whole task, soldering that little bugger to a DIP socket...) & send it out over the serial port. I can post the code here if anyone's interested.

I bought a fairly expensive thermocouple that's good for 1100 degrees, there are cheaper ones which don't go so high.

Navigation

[0] Message Index

[#] Next page

[*] Previous page