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Thread: ATX/Power shutdown controller

  1. 10-22-2003, 11:43 AM #1
    MatrixPC
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    ATX/Power shutdown controller

    I paypal Mastero for a SDC but got refunded so I digging thru the forum and found this schema for SDC http://home.comcast.net/~danielsoh/img/atxshutdown.gif originally design by some member of this forum. I try to recreate the circuit and run thru the simulation to see how it work before building one but the result of the simulation is not what I expected. I am not sure what is wrong, and I am not an EE guy.
    Notes that I change the Trimpot from the image above to regular resistor and base on R*C = Time(second) to estimate the time.
    I think/expect this is how the circuit works.
    - ACC/Control line ON -> and after a few second -> Switch ON Inverter/PSU.
    - ACC/Control line OFF -> Rundown time (some minutes) -> Press/Simulate ATX PWR switch to turn off computer -> Rundown Time (Some minutes) -> Switch off/Cut power to Inverter/PSU.
    - Kill Switch -> cut power to Inverter/PSU.

    Attachment in order.
    1st image: before the simulation run.
    2nd image: 8.5 Seconds into the run (the chema app cpu power is ~100% NOT system CPU). I switch ON the ACC/Control line.
    3rd image: 45 second into the run (~35 sec after ACC ON) the Inverter/PSU line is switch ON. This is as expected but too long. I may change R3 value to make it shotter.
    4th image: After 20 min into the run, I switch OFF the ACC Control line. NOTHING is happen after that. No ATX PWR switch press and power to PSU/Inverter is NOT cut off (I understand that there are rundown time control by C1 VR1 and C3 VR3). I wait for 10 min (~2min is my setting) after ACC OFF to see if the ATX PWR signal is generate but NONE. Another 10 min (~2min is my setting) for cut OFF power but NONE.

    Can someone show me what is wrong?
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  2. 10-22-2003, 02:03 PM #2
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    You can also buy these directly from Jeff, the man who came up with this circuit: http://home.comcast.net/~zootjeff/shutdown/
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  3. 10-23-2003, 12:49 AM #3
    MatrixPC
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    I may want to get one later but for now I really want to know what I did wrong with the circuit. It really bug me why I can't get it to work.
    2004 Matrix XR A7N8X-VM/400 AMD XP-M 2500+, DS-ATX
    89 Supra Turbo P3 600E@750/Abit BE6 II, Alpine M-BUS Car2PC.
    Y2K Accord Dell GX150
    RoadRunner is the best FE PERIOD
    EmoRebellion is a SCAMMER
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  4. 10-23-2003, 03:16 AM #4
    ciagon
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    I am confused. Why is it so difficult to make a shutdown controler?

    Cant you just throw together a parallel port plug with a resistor or voltage regulator to sense when the car is off. They just have a peice of software poll the pin every second?

    --Tom
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  5. 10-23-2003, 10:33 AM #5
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    Quote Originally Posted by ciagon
    I am confused. Why is it so difficult to make a shutdown controler?

    Cant you just throw together a parallel port plug with a resistor or voltage regulator to sense when the car is off. They just have a peice of software poll the pin every second?

    --Tom

    Now that sounds like a difficult way to do an easy thing.
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  6. 10-23-2003, 10:43 AM #6
    MatrixPC
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    Angry

    I know this circuit is working cuz people are using it.
    As of my current setup, I don't really need this shutdown controller, but it's nice to have one because I have to hit the PWR button to shutdown the computer. The Alarm Remote Start/Turbo Timer will taking care of quickstop and shutting down the Inverter/PSU. The mobo "Resume on power lose" taking care of the booting.
    Don't you hate it when something is not working for you but others?
    2004 Matrix XR A7N8X-VM/400 AMD XP-M 2500+, DS-ATX
    89 Supra Turbo P3 600E@750/Abit BE6 II, Alpine M-BUS Car2PC.
    Y2K Accord Dell GX150
    RoadRunner is the best FE PERIOD
    EmoRebellion is a SCAMMER
    Reply With Quote Reply With Quote
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