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Infrared receiver module pinout

Discussion in 'Electronic Components' started by Michael, Jan 8, 2006.

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  1. Michael

    Michael Guest

    I'm going nuts trying to figure out the pinout on a ired rcvr module....the
    Sharp GP1UM281YK.

    The data sheet is contradictory.

    This is a little stand up module that has 2 mounting flanges and then a 3
    pin configuration.

    Aren't these an industry standard pinout?....sharp, lite-on etc.?

    Is this it......as you look at the front where the lens is the 3 pins would
    read left to right.....

    output Vcc ground

    right? wrong?

    I now see an everlight part that looks close to the sharp and it's.....

    output ground vcc (front view)

    anyone have any experience with this part?
    thanks.
     
  2. Guest

    No.

    Check continuity between the case and each pin. The case is grounded.
    That gets you one pin. Then use a power supply and oscilloscope to work
    out what the other two pins are.
     
  3. they are not standard, but it is easy to find the pinout experimentally - just put a 1K resistor in
    series with the 5V supply to avoid damage if misconnected & use trial and error.
     
  4. Michael

    Michael Guest

    Actually, I shoudn't have made the post....just a heat of the moment bit of
    frustration. (I was pissed -- in other words).

    The data sheet is a contradiction.

    Actually, the case isn't grounded but yeah I did just look at the pins with
    a vom to figure it out.
     
  5. Ground the case then. I have one like this (with the metal case) and
    unless you ground the case, you will probably have allot of 60Hz noise
    on the output.
     
  6. Barry Lennox

    Barry Lennox Guest

    I have used a number of these, AFAIK, they are made by Sharp, it's a
    little stand-up module and there's a metal cage over the plastic body.
    But there is no provision for earthing the metal cage

    The pinout (front view) is out-gnd-Vcc (5v). Out is usually connected
    to Vcc with a 4k7 resistor. At short range this generates a
    data-stream rail-rail.

    Barry Lennox
     
  7. Rich Grise

    Rich Grise Guest

    Can you please post a link to this data sheet and point out the
    contradiction?

    Thanks,
    Rich
     
  8. Michael

    Michael Guest

    Yeah...you should always ground the case.

    So go to digi key....put in part # 425-1148-nd.

    Go to tecnical info and pull up pdf data sheet.

    Look at page 10.

    Middle drawing and bottom drawing are bass ackwards.

    The bottom shows the lens facing toward top of page but the pins are
    wrong.....(study closely).

    As you look at the lens.....it should be....

    output Vcc ground


    This kind of stuff can drive you crazy.
     
  9. Michael

    Michael Guest

    and as I look at it again it says SOLDER SIDE OF BOARD.

    S H I T.
     
  10. How lame. Like they would know which side was the solder side (likely
    both w/extra layers in between these days). Now, "component side",
    there's a term that's not quite so ambiguous.
     
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