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need pinout of FPT100A phototransistor

Discussion in 'Electronic Basics' started by [email protected], Aug 19, 2005.

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  1. Guest

    Hi, I have some FTP100A phototransistors (3) which
    I want to use to make an optical switch, like
    an optoisolator.

    But I cannot find the pinout information for this part.
    I found one online datasheet, but it didn't show a picture
    of the package

    It has 3 pins and a flat side. It also has a clear
    top, and I can see down inside, to the photoreceptor
    part.

    Any leads appreciated.
     
  2. Jasen Betts

    Jasen Betts Guest

    so with three leads there's 6 possible ways to hook the device up, and if
    you just guess, getting it wrong is unlikey to damage it,

    follow the example circuit on the data sheet, or any other phototransistor
    circuit, if it doesn't function dtry a different orientation.

    Why didn't you get pre-fabricated opto-isolators like the 2N138

    Bye.
    Jasen
     
  3. Ken Moffett

    Ken Moffett Guest

    Hold the transistor so you're looking at the base, where the leads come
    out. Rotate it so one pin is on the left, one is on the right, and one is
    in the top-center position. The left is emitter, the center is the base,
    and the right is the collector.
     
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