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Reverse Photoresistor????

Discussion in 'General Electronics Discussion' started by LectricCircuit, Apr 7, 2017.

  1. LectricCircuit

    LectricCircuit

    33
    2
    Apr 7, 2017
    A photoresistor naturally increases its resistance in the dark preventing power to the output of the circuit. While in the light, its resistance decreases and allows power to the output. Is there a way to reverse the light and dark effect on the photoresistor? So resistance will decrease in the dark and increase in the light, turning on in the dark and turning off in the light?
     
  2. duke37

    duke37

    5,252
    725
    Jan 9, 2011
    I do not think that there is a reverse photoresistor but a single transistor can reverse the action.
     
    davenn likes this.
  3. Bluejets

    Bluejets

    3,517
    713
    Oct 5, 2014
    Or transpose it's position on a voltage divider.
     
    davenn likes this.
  4. davenn

    davenn Moderator

    13,323
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    Sep 5, 2009
    you have been given two good answers
    to take those answers a bit further with two basic circuits that could be added to


    [​IMG]


    [​IMG]


    Dave
     
    duke37 likes this.
  5. LectricCircuit

    LectricCircuit

    33
    2
    Apr 7, 2017
    Thank u. It works
     
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