Thermocouple thermometer

Discussion in 'The Projects Forum' started by smelly, Oct 19, 2009.

  1. smelly

    Thread Starter New Member

    Oct 19, 2009
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    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
     
  2. StayatHomeElectronics

    Well-Known Member

    Sep 25, 2008
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    You forgot to attach the diagrams...
     
  3. smelly

    Thread Starter New Member

    Oct 19, 2009
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    these are the diagrams :)
     
  4. bertus

    Administrator

    Apr 5, 2008
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  5. StayatHomeElectronics

    Well-Known Member

    Sep 25, 2008
    864
    40
    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
     
  6. t06afre

    AAC Fanatic!

    May 11, 2009
    5,939
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    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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