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Novice hobbyist looking for help

Discussion in 'Electronic Design' started by stevo, Mar 31, 2005.

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  1. stevo

    stevo Guest


    I'm working on a project and need help. I have a small room that I need
    to setup a couple of devices. This is for an art show im doing, and its
    suppose to mimic an interrogation room.

    So, as you walk into the room (normally lite room)
    - a pressure sensor will be setup under a stool
    - when you sit on the stool, it trips a relay
    - switches off normal lights and turns on spot light over stool
    - i then have pre-recorded questions on a cd which i would like to
    start play whent the spot light is turned on
    - when the person stands up i need the cd player to stop, but if they
    sit down again the cd needs to start again (from the start)

    Im really confused how to set this up electronically

    I have thought of using a relay that when closed from the pressure
    sensor, it will close the loop for the speakers (which i thought of
    letting the cd run on a loop) but I need the cd start at the start
    everytime someone sits on the stool.


  2. mike

    mike Guest

    Use a laptop to play the CD, sense the switch, switch the lights.
    This is gonna be far easier than trying to kludge a CD player to start
    on command. Also allows you do do some other stuff, like set a
    threshold weight to estimate male/female and change the questions
    accordingly. If if they get up too soon, COMMAND them to SIT DOWN!!!

    Return address is VALID but some sites block emails
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  3. stevo

    stevo Guest

    Thanks mike, which program should I be using and how can i get the
    laptop to sense the sensors (should i be using the par. port)

  4. Colin Dawson

    Colin Dawson Guest

    You're getting into some serious stuff now. I'd suggest taking a look at a
    the Velleman K8000 board. This could be used to both Sense the person
    sitting down using a pressure switch. Depending on how you set things up, I
    think it can be made to detect a heavy/light person. As for guessing their
    sex, I won't try that as it'll be a little too dodgy - imaging a man in the
    room getting mistaken for a woman - hmm, could be funny.

    There's also a new board, that uses USB. As for getting the computer to do
    what you want, I'm not sure what your technical level is on that, but it's
    possible to do what you're after.


    Colin Dawson
  5. Luhan Monat

    Luhan Monat Guest

    Your not a cop in Naples Florida, are you?
  6. stevo

    stevo Guest

    no, artist from Canada
  7. John Smith

    John Smith Guest

    One man's art is another man's junk.
  8. Mark Jones

    Mark Jones Guest

    Especially at!
  9. Guest

    Yep, and that crap gets paid for out of my pocket. Now you want people
    to help you set up an automated torture room... we dont know who you
    are or what war you might be fighting. Get stuffed.

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