Temp sensing circuit

[Kevinand]

Hi,

I am wondering how to create a temperature sensing circuit that will incorperate hysterisis.

what i am given to use is an LM107 positive reference voltage op amp, AD590 IC temp sensor and LABVIEW software.

I have created a program with logic that will trigger to activate when temp falls below the set temp and incorperated hysterisis so that it wll go on untill i reaches a temp above the set temp.

basically, given this circuit from application note 31, how can i use the hardware to create this scenario. would i use a voltage divider to compare to the reference voltage?

[johnsold]

First, Posting in this Instrument Control board is probably not the best place to get the help you want.  Either the Circuit Design Suite (Multisim, Ultiboard) or the LabVIEW boards might be better.

Second, It is not at all clear what you want help with.  If this is a school assignment (it sounds like one), it is courteous to inform the board of that.  The participants on the Forums are willing to help people learn about LabVIEW, but we do not like to be tricked into doing someone's homework for them.

What parts are you doing in hardware and what parts in LabVIEW? What kind of data acquisition equipment do you have?

Third, What does the circuit you posted have to do with this project? It has an output but no inputs. The temperature sensor is not part of the circuit.  That looks like it could have come from an old National Semiconductor Application Note, but I am not going to search all over for note 31.

Lynn

[Henrik_Volkers]

@ Lynn,

the poster was handed out some parts.

He already found appnotes 🙂 , maybe they even contain all the parts 😄

Now he needs to understand the task given and the appnotes.

Helpful is the ability to formulate a questions ...

@Kevinand

here is the academic  board

http://forums.ni.com/t5/Academic-Hardware-Products-NI/bd-p/10

reread your post and try again.