Need some help with an optical detector.plz

Discussion in 'Homework Help' started by thekillerx, Jan 22, 2010.

  1. thekillerx

    Thread Starter New Member

    Jun 2, 2009
    3
    0
    Hi im a newbie here. im tryin to find a way to place an IR sensor on both sides of a gate.
    lets say this is the gate >>

    | --Gate --|
    |°--------°| these are IR transmitter and receiver
    | <1meter> |

    while the beam is still high at the receiver the LED is ON but if someone crosses the beam the LED is turned off. i tried using IR LED and IR Module but it did not work.:confused::confused:

    so, im looking for some suggestions. Thanks:)
     
  2. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Can you post the schematic of the circuit that failed to perform as you intended?

    hgmjr
     
  3. thekillerx

    Thread Starter New Member

    Jun 2, 2009
    3
    0
    I jus did some modification but it will still receive a signal even if i passed by

    hgmjr (moderator): I removed the schematic containing the reference to a commercial website and replaced it with an attachment absent the website watermark.
     
    Last edited by a moderator: Jan 23, 2010
  4. hobbyist

    Distinguished Member

    Aug 10, 2008
    764
    56
    Not sure what your asking,
    From what you wrote above it sounds like its working, (detecting a person breaking the beam.

    Explain what it is supposed to do, then explain what its really doing.
     
  5. thekillerx

    Thread Starter New Member

    Jun 2, 2009
    3
    0
    i wanna place them at the gate so it counts using 7-segment display derived by a PIC16F84A
     
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