IR receiver

Discussion in 'The Projects Forum' started by h2opolo, Nov 21, 2014.

  1. h2opolo

    Thread Starter Member

    Aug 2, 2013
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    I was trying to figure out how IR receivers behave in circuits and came across a type with three leads and a type with two leads. Can someone provide a simple explanation of how these function in a circuit and the difference between them. Is there any difference between these and transistors? Thanks.

    To be specific I have some of the three lead ones. The model is TSOP4838.
     
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
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    Have you downloaded and read the data sheet on the TSOP4838?
     
  3. alfacliff

    Well-Known Member

    Dec 13, 2013
    2,449
    428
    some have a bias lead. and some have an internal shield to reduce noisr.
     
  4. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    The device with two inputs is probably a phototransistor.

    The three terminal device includes a system to decode a modulated IR signal (see the datasheet).
     
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