Saw this old thread .. As I was thinking of remote temp probe for a smoker.
http://forum.arduino.cc/index.php?PHPSESSID=iht7nk6ul9irr9dfijbb0pmg57&topic=19960.15#
And I was wondering what kind of signal this probe generates ??
Seems like it would possibly work?
Http://www.amazon.com/gp/aw/d/B006XLWL7K?pc_redir=1397703003&robot_redir=1.
The links don't work. Try them from the forum screen.
Why don't you use this one ? (uses a library with a chip select, clk and data pins)
Hi,
sorry about that bad link. Hopefully this works better. Not the same thing I had wanted to list on Amazon, but this is less expensive. the link didn't copy very well from my phone. The link is for the probe to insert into food..
http://www.klockit.com/products/dept-95__sku-16778.html (replacement probe)
So.. would the adafruit MAX31855 be needed to interface with this probe?
or would this probe interface directly to the analog inputs of the Uno?
There's a big assumption that the probe is a K-type thermocouple, but if it is, then the MAX31855 is the chip for it. Not a "bad" assumption I suppose.
Thermocouples have a small variance in the voltage they output so you need something like the MAX31855 to amplify it. An Arduino has a precision of 1024 values between 0V and 5V, and, as an example, a K thermocouple only puts out ~3 millivolts at 160F.
As an aside, you can find lots of K-type thermocouples on eBay in a wide variety of styles.
Thermocouples have a small variance in the voltage they output so you need something like the MAX31855 to amplify it. An Arduino has a precision of 1024 values between 0V and 5V, and, as an example, a K thermocouple only puts out ~3 millivolts at 160F.
You should probably explain that it the info you just posted above does not apply to the Max31855 because it has an amplifier and
transmits digital so the analog input capability of an arduino is completely irrelevant when using the max31855.
It does however provide a good comparison of what you would be struggling with if you didn't have the 31855.