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Thread: startup shutdown etc.

  1. #1
    Variable Bitrate
    Join Date
    Jul 2001
    Location
    The Netherlands
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    307

    startup shutdown etc.

    Hi all...
    my brain is overheated, I just can't figure it out.
    I've made jeffs shutdown controller ( http://www.dosh.tk ) except for the relay part, as I want it to only turn off using the power button, my dc/dc should remain on for str.

    The shutdown works fine, now I added another "puls-part" so that when I turn my key to ACC a pulse is given so that my pc will boot. Also works fine, now the problem:

    Normally when you turn of the car the shutdowncontroller waits for some time before giving the shutdown puls. If you turn on ACC while the controller is waiting, the pc won't be shutdown.
    problem I'm having is that when I turn on ACC a pulse is produced so my pc will startup if it's off but shut down when it's on... that wasn't what I wanted!.

    I want the same thing to happen like the original... if the controller is in the "wait-state", and I turn on ACC I don't want a pulse. nothing should happen.

    I'm hoping to use the same timer-part as on the "on site" of the circuit, but I just can't figure out how to do this....

    please help me....
    If at first you don't succeed.........
    destroy all evidence you tried

    for info on t6369c LCD or Presslab's powersupply check:
    http://www.namms.tk <=updated!!

  2. #2
    Newbie
    Join Date
    Jun 2002
    Posts
    35
    Hey man that sound like an annoying problem.

    I don't have a shut down controller in my system yet however I am in the middle of designing one, if you tell me exactly what you want, and maybe some other cool features that you think would be useful I might be able to help you out.

    Cheers.

    Marty

  3. #3
    Variable Bitrate
    Join Date
    Jul 2001
    Location
    The Netherlands
    Posts
    307
    Solved it....

    the solution is so simple that I'm angree with myself for not seeing before

    But I now found another problem: when I turn the pc of manually, and then I turn my key back to off. the PC will boot after +/- 8min.
    I know I can solve this my using an "AND" between the + from the powerled & the output of the controller, but this means I need to add another IC which will make the print larger which I don't want.... anybody now of "small" AND-IC, or know a different solution ?

    here it is:
    If at first you don't succeed.........
    destroy all evidence you tried

    for info on t6369c LCD or Presslab's powersupply check:
    http://www.namms.tk <=updated!!

  4. #4
    Newbie
    Join Date
    Jun 2002
    Location
    Parkersburg, WV
    Posts
    52
    Built completely from Radio Shack parts. This is what is in my car: http://groups.yahoo.com/group/dashpc...%20circuit.jpg

  5. #5
    Maximum Bitrate
    Join Date
    Sep 2001
    Posts
    744
    Correct me if I'm wrong, but since you're using suspend to ram, which probably takes a whole 5 seconds to suspend the machine to the off state, couldn't you simply set your shutdown timers to very small amounts of time, and then that will decrease the likelihood that when your ACC wire goes high, your computer will still be on?

    Also please explain that schematic you redrew for me, I'm not sure what you mean by putting +5V on the bottom left there, do you mean that that wire should connect to the regulator output at the top? I too would like a ATX-on pulse but I didn't know it was possible to do it without using a 555 timer.

  6. #6
    Variable Bitrate
    Join Date
    Jul 2001
    Location
    The Netherlands
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    307
    The IC is an inverterIC, so if pin1 is not connected, pin2 will be high = 5V, you could connect it to the regulator output, but I didn't want to solder another lead.

    I don't get your first comment, maybe I wasn't clear.. I'm dutch => my english sux.
    therefor again my problem (which I think I solved, check the drawing, the AND-port):

    normally:
    I turn my key to acc on=> pulse generated=>pc boot.
    turn key to acc off => waits 8min. pulse generated=>pc shutdown

    problem:
    I turn my key to acc on=> pulse generated=>pc boot.
    I manually shutdown my PC..
    I turn my key to acc off=> waits 8min. pulse generated=>pc BOOT!!
    If at first you don't succeed.........
    destroy all evidence you tried

    for info on t6369c LCD or Presslab's powersupply check:
    http://www.namms.tk <=updated!!

  7. #7
    FLAC
    Join Date
    Apr 2001
    Location
    Portland OR
    Posts
    1,244
    If you don't connect an input to the CMOS inverter, don't assume that it will be low. If you touch the input with your finger it could go high, if it gets near power lines it could go high. The input needs to be grounded if you want the output high.

    Jeff
    MPEGBOX - Plexiglass Computer
    www.mpegbox.com

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