Help me to invert voltage


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  1. #1
    Join Date
    Sep 2007
    Posts
    4

    Default Help me to invert voltage

    Hello, it is my first post.

    I want to modify simple voltage divider to have 2 simultanous outputs:
    a) output 0 to 5v
    b) output 5 to 0v
    example : if the output a is 1v then output b is 4v, if output a is 2.5v , output b is 2.5v
    Code:
      5v----
            I
            >  pot 10k
            <----------> output  a (0 to 5v)
            >       I
            I       I
      gnd---        -------- ?????? -------> output b (5 to 0v)
    can opamp be used as inverted voltage follower ?

    thank you
    Last edited by vios; - 16th September 2007 at 15:12.

  2. #2
    Join Date
    Oct 2003
    Location
    holland
    Posts
    251


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    Yes, you can use an opamp for this. The best is to use an opamp which has a rail to rail output . Than the output voltage goes to 0 and to max V
    I post the schema here hoe to make it.
    Attached Images Attached Images  

  3. #3
    Join Date
    Sep 2007
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    4


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    Thank you for your help, Mat
    Have a nice day !

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