control design of doors,lights and gates interfacing with a pc

Discussion in 'The Projects Forum' started by dachy12, Oct 27, 2008.

  1. dachy12

    Thread Starter New Member

    Oct 27, 2008
    4
    0
    How to design and implement a system which will be used to control remotely the lights, gates and doors in a building by using the parallel ports of the pc for interfacing the hardware part and the pc which will be used as the controller
     
    Last edited: Dec 2, 2008
  2. Wendy

    Moderator

    Mar 24, 2008
    20,764
    2,534
    Ever hear of SSR's (Solid State Relay's)? They are optically coupled triacs which require very low voltage and current to control AC. You can use your printer port to control them. To test the interface safely you can even use conventional LED's w/ resistors, and replace them with the SSR later.

    The printer port may not have enough control lines, you'll have to figure that one out yourself.

    http://ourworld.compuserve.com/homepages/Bill_Bowden/page6.htm#PPRIC

    BTW, the same printer port can also be used as an input.

    SgtWookie had an excellent suggestion concerning this idea though, buy a printer interface card. If you slip and burn it out you don't have to replace a motherboard. They're also pretty cheap too, another bonus.
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Does "control" mean open and close remotely, or just monitor the state of each gate and door?
     
  4. dachy12

    Thread Starter New Member

    Oct 27, 2008
    4
    0
    can you help me with the circuit for controlling lights,gates and doors in a building by using a pc as the controler
     
  5. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,669
    804
    You can´t read, can you?
    If you can, read what beenthere said and think about it.
     
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