Simple way to detect when somebody passes by?

Discussion in 'Embedded Systems and Microcontrollers' started by jean28, Jan 20, 2014.

  1. jean28

    Thread Starter Member

    Sep 5, 2012
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    0
    Hello guys,

    I am thinking of a project that involves taking a picture when a person passes a certain area (say, entering my house without any authorization). I was thinking that maybe an easy way to detect the person passing by would be using some type of laser that gets connected to an MCU and, when the laser wave gets interrupted, then the MCU does something else that I want (say, sending me a message telling me that somebody broke into my house).

    Anyways, my question is, is there any mainstream laser that is easy to interface with and does what I want it to do? Also, is there a better way than using these lasers I am talking about?

    Thank you very much :D
     
  2. shteii01

    AAC Fanatic!

    Feb 19, 2010
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    495
    Yes. You have two choices:
    1) Interrupted beam.
    2) Reflected beam.

    For example, in my physics lab we used interrupted beam unit to take measurement. I think both types are commercially available.
     
  3. tracecom

    AAC Fanatic!

    Apr 16, 2010
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  4. jean28

    Thread Starter Member

    Sep 5, 2012
    76
    0
    Do these beams have any particular names? Or are there any models that you can recommend?

    Thanks!
     
  5. shteii01

    AAC Fanatic!

    Feb 19, 2010
    3,382
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    I can not give you anything specific since I never worked with one, just know that they exist.

    Here is an example, and the site also provides a tutorial: http://www.adafruit.com/products/189
     
  6. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,507
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    Motion detector, also another from ebay 380661937136 .
    Max.
     
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