How to add a relay to power on the CPU

Discussion in 'General Electronics Chat' started by Derricck Rose, Jun 27, 2013.

  1. Derricck Rose

    Thread Starter New Member

    Jun 27, 2013
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    [/COLOR]Hello! I have diagram here that shows function to freeze the mouse and keyboard.


    [​IMG]

    Anyone here know how to add a function to power on the CPU using a relay.
     
    Last edited by a moderator: Jun 28, 2013
  2. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    What is the purpose of freezing the mouse and keyboard?
     
  3. absf

    Senior Member

    Dec 29, 2010
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    Are you actually refering CPU as a "PC"?

    That should be easy, Just connect the N.O. contacts of the relay in parallel with the "power on" button on the front panel for 1 seconds. But how do you turn on the relay?

    Allen
     
  4. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    Why? Just lock your computer with a password!
     
  5. panic mode

    Senior Member

    Oct 10, 2011
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    as asked already, what is the purpose of this?
    it can't be security (unless this security inventor is a complete idiot) because killing power to usb hub accomplishes nothing - one can simply get rid of hub and connect keyboard and mouse directy.
     
  6. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    I've seen a key lock system or vending system for public kiosks where the PC and monitor is in an enclosure and keyboard/mouse is accessible. They wanted the live video and other on-screen data to be visible so "locking" the desktop was not possible.

    What I an trying to say is, it is not necessarily an idiotic idea.
     
  7. Peter_England

    Member

    Jun 29, 2013
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