home automation of door,lights and gate by using pc'parallel ports

Discussion in 'General Electronics Chat' started by dachy12, Dec 23, 2008.

  1. dachy12

    Thread Starter New Member

    Oct 27, 2008
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    0
    a help on the circuit diagram for home automation control of lights,door and gate by using the parallel ports of a pc
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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  3. mik3

    Senior Member

    Feb 4, 2008
    4,846
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    It is better to use optoisolators between the parallel port and the devices you want to control as to avoid the possibility of destroyed the motherboard due to faulty external voltages.
     
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