Using PhotoDiode as a lux meter

Discussion in 'General Electronics Chat' started by bolitski, Jun 17, 2008.

  1. bolitski

    Thread Starter New Member

    Jun 17, 2008
    2
    0
    Hi All,

    I have this project that I want to measure 5 specific points in a light reflecting mirror.

    I am not able to use a lux meter since a lux meter would measure the whole area. its a small area around 5 x 5 cm. I want to measure the 4 corners and the center to see if the light is equally distributed. So the only way is to make a custom circuit using a photo diode to read the luminosity of the area.

    Attached is the ckt. Please tell me what you think. Or if somebody can give me an idea, would be much appreciated.
    Attached Image
    [​IMG]
     
    Last edited: Jun 17, 2008
  2. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    No attachment appears to be present in your posting.

    hgmjr
     
  3. bolitski

    Thread Starter New Member

    Jun 17, 2008
    2
    0
    Hi..i'm sorry for that..rectified the problem :)
     
  4. pavitra p

    New Member

    Oct 1, 2009
    1
    0
    hi
    hey can you plz explain in brief the working of luxmeter circuit which u have posted above.
     
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