Door help/detection

Discussion in 'The Projects Forum' started by ecjohnny, Oct 1, 2008.

  1. ecjohnny

    Thread Starter Senior Member

    Jul 16, 2005
    142
    0
    Yo guys..
    can anyone help me/ advice me to this problem in my project?

    i need to detect a person going out of a room. Yes, only out and not in.
    what kinda sensor/module i can use and it must be small enough to attach at the door or ...?
    Also if i want it to transmit wireless to my laptop.

    Recently i just do some research on touch switch which might work as it could be attached to the door as the person is going to lock the door, he must touch it which send a signal to my laptop via wire.

    how can i do it? is it possible?

    Any suggestion/ help would be appreciated.
     
  2. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
  3. ecjohnny

    Thread Starter Senior Member

    Jul 16, 2005
    142
    0
    Other than a pair of PIR sensors, what else can i used?
     
  4. pebe

    AAC Fanatic!

    Oct 11, 2004
    628
    3
    You could use pressure mat sensors.
     
  5. ecjohnny

    Thread Starter Senior Member

    Jul 16, 2005
    142
    0
    yeah.. a mat. i thought of it too. if i want it to have a transmitter/ receiver how can i modify it. or is there any small flexible transmitter/ receiver out there? Anyway i ma just asking.
     
  6. iONic

    AAC Fanatic!

    Nov 16, 2007
    1,420
    68
    How far away will your laptop be from the room (captive person) you are monitoring? Just kidding on the captivity issue!

    They make driveway motion sensors that transmit wirelessly. Place the sensor/transmitter above the door pointing down and put the receiver wherever you are in the room. The only question is whether or not it will transmit through walls. $15-$20 max.

    If you are intent on having your computer receive the data there may be a way to wire the receiver, but I'm not the guy to spell that out for you.
     
  7. ecjohnny

    Thread Starter Senior Member

    Jul 16, 2005
    142
    0
    actually i found a way to make a mat switch here :http://supersoda.com/detail.php?id=00000000036

    But i could not understand the wiring part. Can anyone draw/explain me how the connection is like.

    For e.g the battery should be connected to which layers and the buzzer/LED connect to which layers?
     
  8. FunkiiMunkii

    Member

    Sep 16, 2008
    12
    0
    Assuming that only one person goes through the door at any given time, you could use IR sensor to detect direction of motion. This probably won't work as well as the pressure door mat, but it will be cheaper, smaller, and less noticeable.

    I guess sending the signal to the laptop wireless is the hard part. You could try using RF modules to send the signal to a microcontroller connected to your USB.
     
    Last edited: Oct 3, 2008
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