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Thread: Startup/shutdown and power advice for a laptop?

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    Startup/shutdown and power advice for a laptop?

    Xenarc 7" touchscreen and a Compaq P3/700 laptop with various USB (bluetooth, wifi, GPS, XMDirect, etc.) wired to a 98 Corvette.

    Can anyone specify a startup/shutdown controller which would work well with this combination?

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    by the way, it already has a power supply, I have a Lind converter which lets me plug the laptop into a cigarette lighter.

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    No one knows?!? I read the power faq last night and it was awesome, but the only startup/shutdown controllers I see are for ATX boards, not laptops.

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    I've confirmed that my power supply from Lind (cigarette lighter to laptop with a regulator in between) is sufficient so that my laptop does not reboot when the car is started.

    So all I need is a startup/shutdown controller. Does no one have any suggestions?

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    Quote Originally Posted by spinedoc
    I've confirmed that my power supply from Lind (cigarette lighter to laptop with a regulator in between) is sufficient so that my laptop does not reboot when the car is started.

    So all I need is a startup/shutdown controller. Does no one have any suggestions?

    Truthfully, almost any SDC will work.

    As a very cheap alternative, you can use a an ITPS if you can find them. They are not the greatest product in the world, but will certainly handle your application if used.

    Basically, my ITPS uses the unregulated power to close a relay, which I used to control the power to the computers PS.

    Then, I use the MB connectio of the ITPS to simulate a button press to the laptop.

    You will need to access the laptops power button to accomplish this. If you have a docking station, that is preferable, because you need not worry about harming the laptop, and you can easily remove the laptop from the car with out worrying about the wires coming from it.

    Hope that helps.
    Michael

    P.S. There is a FAQ about using a laptop as a carputer, and I think it talks about hacking the power button. If not, a search to that effect should return some threads for you to peruse.
    ...I love the French language...especially to curse with...Nom de Dieu de putain de bordel de merde de saloperies de connards d'enculés de ta mère. You see, it's like wiping your *** with silk, I love it.

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    Thanks much. Scouring thru threads I see that some have made serial adapters that activate the WOR wake on ring pin 9 to turn the laptop on. I see that most turn off power to their laptop, I would rather keep power constant to the laptop to keep the battery charged.

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    Quote Originally Posted by spinedoc
    Thanks much. Scouring thru threads I see that some have made serial adapters that activate the WOR wake on ring pin 9 to turn the laptop on. I see that most turn off power to their laptop, I would rather keep power constant to the laptop to keep the battery charged.
    That is certainly an option. Although I have heard of the Wake on Ring/Wake on Lan options, I have no knowledge of thier use or effectiveness.

    If you prefer to keep the battery charging constantly, you must consider how this will affect your battery. Just keep it in mind. There are SDCs that can sense a voltage drop, which you can use to remove power from the laptop if the voltage drops below a set voltage, thereby preserving your battery, and allowing you to start the car. This will, however, affect your battery. The more often it gets discharged below a certainy voltage (Not sure what it is though) the less efficient the battery becomes.

    Even with an ITPS you can shut down the computer, yet leave power to the laptop for charging purposes.
    However, you might want to consider a simple R/C circuit to turn on the laptop, since you want it charging all the time.

    It's just a matter of how much you want to spend, and how much time you have to invest.

    Michael
    ...I love the French language...especially to curse with...Nom de Dieu de putain de bordel de merde de saloperies de connards d'enculés de ta mère. You see, it's like wiping your *** with silk, I love it.

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    you might be able to rig something to run to the power switch or to the lid sensor

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    I couldnt see the laptop being on all the time affecting my battery too much. The battery will always be full, so the smart charger will turn off charging. The only draw will be from keeping the laptop in standby. On the other hand constantly charging and discharging a laptop that gets turned off and on will shorten the lion battery pretty fast.

    For shutdown I think I am just going to make a big desktop button, so I can standby thru the monitor. I think on occasions where I am just running into the store I am not going to want to put it in standby. The monitor will be connected to a switched power, so it will turn off right away.

    So my only problem is getting the unit to start again from standby when I start the car. Seems like my only option is to hard wire the power button to the ignition, or see if the wake on ring thing works.

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    I'm hooking up my opus 150 to my laptop.... it will control startup/shutdown..... like was mentioned before, you will need to either physically attach wiring to the power switch if possible, or a small door lock actuator could make the button press.....

    in either event you will need to have your usb power trip a relay to tell the shutdown controller when the laptop is on, since you won't have a header on your motherboard for that..... by using the opus I have a nice regulated 12v for screens & cameras & more than enough power for any 5v usb stuff I can throw at it... 3.3v can be used for led's if your into that sort of thing

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