Thermocouple thermometer

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smelly

Joined Oct 19, 2009
4
AS MY PROJECT I AM CREATING A THERMOCOUPLE THERMOMETER, I WANT IT YOU READ J TYPE. I HAVE FOUND A COUPLE OF CIRCUITS AND I HAVE AN IDEA TO TRY AND COMBINE THEM, BUT I DON'T KNOW WHERE TO START :confused:

I HAVE ATTACHED THE DIAGRAMS I AM THINKING ABOUT TRYING TO COMBINE.
ANY HELP WOULD BE MUCH APPRECIATED
 
Your first attachment is pretty much unreadable.

It looks like you want to replace the BC547 transistor, used as the temperature sensor in the first circuit, with the voltage output, V1, of the second circuit. If that is a ICL7106, then your V1 should go across pins 30 and 21. Check the data sheet for full details.

http://www.intersil.com/data/fn/fn3082.pdf
 

t06afre

Joined May 11, 2009
5,936
Is this a school assignment, in which you must use a J type thermocouple? Depending on range your design could be simplified if you use a LM35. Just a tip.
 
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