Results 1 to 6 of 6

Thread: ATX auto power on

  1. #1
    Newbie
    Join Date
    Sep 1999
    Location
    Sun City, CA, US
    Posts
    15

    Lightbulb ATX auto power on

    Is there any way to get an ATX motherboard to automatically power on when power is applied to it if there isn't such a setting in the BIOS? I know there are MB's that have a setting like the in the BIOS, but mine doesn't, and it's a pain to open the trunk every time and power it on.

  2. #2
    Newbie
    Join Date
    Dec 1999
    Location
    Wilton, CT, USA
    Posts
    9

    Lightbulb

    Find the motherboard power-on pins (which the power-on switch connects to). You can either lengthen the old switch, or use a totally different switch (single pull single throw) The motherboard just needs a short connection between these two pins. I figured this out by taking a peice of soder and using it to connect the m/b pins.


  3. #3
    Newbie
    Join Date
    Sep 1999
    Location
    Sun City, CA, US
    Posts
    15

    Thumbs down

    This doesn't work. It's the equivalent of holding in the power button. Any other ideas?

  4. #4
    Constant Bitrate
    Join Date
    Oct 1999
    Location
    CA, USA
    Posts
    118

    Thumbs up

    Check back with me in a week. I am working on a modification to my powerup/powerdown board to have a small onboard relay that is momentarily activated for turning on ATX motherboards. See http://www.dschmidt.com/autooff.html for the current version of this powerup/down board.

    Dave

  5. #5
    Variable Bitrate spud42's Avatar
    Join Date
    Oct 1999
    Location
    brisbane,qld,australia
    Posts
    241

    Lightbulb

    how about a relay where the coil is powered from 12 volts but with a resistor/capacitor network powering the coil sothat it takes a little time for the coil to energise and short the relay contacts. time delay is 5 times the r c time constant.
    just an idea hope it works...should do...
    Volvo V40 Phase 2 2002. T4 turbo upgrade.... currently no mp3 or carputer..... researching options

  6. #6
    Newbie
    Join Date
    Oct 1999
    Location
    London, UK
    Posts
    33

    Unhappy

    Hi all,

    I found a couple of circuits at the websites below that may just do what we want here! Have a look....
    http://www.aaroncake.net/circuits/relaytim2.htm or http://ourworld.compuserve.com/homep....htm#delay.gif


    Nev.

    [This message has been edited by nevb (edited 01-25-2000).]
    Nev.

    Squeezing MP3 technology into a Mazda MX5
    Web: http://www.neddynet.co.uk/mp3
    Email: [email protected]

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •