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how ckt works?

Discussion in 'General Electronics Discussion' started by bubble, Mar 23, 2014.

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  1. bubble

    bubble

    4
    0
    Mar 23, 2014
    Implemented the circuit in the attachment on bread board.
    At room temperature, Vout= 0.11V
    Hold LM35(temperature increase), Vout= 0.12,0.13,0.15V
    Temp(oC)= Vout*100
    I don't understand how the ckt works? and if pot value changes how output varies and why?
     

    Attached Files:

  2. Harald Kapp

    Harald Kapp Moderator Moderator

    10,213
    2,201
    Nov 17, 2011
    The LM35 is a temperature sensor. It outputs a voltage proportional to temperature. Read the datasheet to understand this chip.

    The LM393 is a comparator. It compares the voltage from the LM35 (- input of comparator) to a reference voltage (+ input). The reference voltage can be adjusted by the potentiometer. Whenever the output of the voltage sensor is higher than the reference voltage, the output of the comparator goes low.
     
  3. bubble

    bubble

    4
    0
    Mar 23, 2014
    Thanks

    Thanks!
     
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