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Thread: Ghetto Startup/Shutdown Control for Inverter

  1. #51
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    Great! Thanks folks. Thats exactly what I needed. Very much appreciated! Once I've got it right, I might make it up and put up some pics, part lists and prices since a few people seem to be interested in this kind of thing.

    Cheers!

    Scott.

    PS: Here's my ammended diagram. How is it looking now? I think I followed what you were saying about the relay and the transistor. What about the LEDs? Will they be causing problems if I leave them there as they are now? Actually, both those LEDs will be showing the same thing wont they?
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  2. #52
    Variable Bitrate kamikaze2112's Avatar
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    ok, i don't think isaw this answered anywhere, so here goes:

    with this circut, if i read the thread correctly, it triggers the generic ups service after ~90 sec. after Vacc goes cold. Once the UPS is triggered, it shuts down the machine, and cuts power to the inverter. Pin 4 on the com port is +5vdc? Can i set it to hibernate instead, and can i set it to hibernate say after 10 minutes? am i going to get annoying error messages from the UPS service? If it's going to hibernate after 10 minutes, do i need the caps?

    also I like hibernating it better, cause i find that there's almost no chance of the machine hanging.


  3. #53
    What can I say? I like serial. Curiosity's Avatar
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    almost
    That's the important word. If it hangs once, it's enough to make you rethink why you would put a PC in your car. A second time, and you'll want something like this or sit in the car until you're sure it's off every time.

  4. #54
    Variable Bitrate kamikaze2112's Avatar
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    well, seeing as i hibernate it with the pushbutton and it has so far worked every single time for the last 2-3 months, i'm pretty sure i'll be ok there. I also have a decent battery, which if i kill, the inverter will shut off anyway. I find it gets a second wind, usually enuf to start the car with


  5. #55
    What can I say? I like serial. Curiosity's Avatar
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    Doing that a lot will reduce the life of your battery unless it's a yellow top. Mine never had trouble hibernating for close to a year, then I added cameras and changed the wifi, etc. and now it's not as reliable with all those drivers that have been installed and uninstalled so many times, so it's more important now that it cuts the power no matter what.

    About the diagram, it will let you hibernate or shut down. The COM port uses +5V from itself, even though I think a COM port can take 25V directly, it's safer to do it that way.

  6. #56
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    Yep, it should hibernate OK if you're happy to trust it to do so... but it'll still shut off the power to the inverter.

    Any comments on the revised wiring?

    Scott.

  7. #57
    Variable Bitrate kamikaze2112's Avatar
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    Quote Originally Posted by the_realscott
    Yep, it should hibernate OK if you're happy to trust it to do so... but it'll still shut off the power to the inverter.

    Any comments on the revised wiring?

    Scott.
    I'm gunna be buiding a much simpler version, with out the caps/leds, and will let you know how it goes.

    One other thing tho, i was wondering what pin is used for the WOR and how can i use that to start the computer. What about the WOL connector on the mobo? I know the NIC needs a special packet, but then does it forward the packet, or pulse or what?


  8. #58
    What can I say? I like serial. Curiosity's Avatar
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    Window XP has a built in monitor for the older style UPS which connects to the COM port. Go to your desktop properties, screen saver, power options, UPS, and select generic. There's more info about it somewhere around here.

  9. #59
    Variable Bitrate kamikaze2112's Avatar
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    yea, i already got that figured out, but i'm wondering if i can ghetto start the pc as well


  10. #60
    What can I say? I like serial. Curiosity's Avatar
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    Yep. You can do that too. I think it's earlier in the thread. Just do resistor & cap pulse on the PC power button when the ACC goes on, but also use 2 diodes to get input from the PC 12V as well, so it doesn't pulse when you turn the key off or on while the PC is on.

    ACC-->|-----cap+resistor--relay--power button
    PC --->|--/

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