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Thread: Properly powering HP touch screen laptop. My searches have confused me even more.

  1. #1
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    Properly powering HP touch screen laptop. My searches have confused me even more.

    Hey folks. I have been on and off the forum for a while now. I was going to go the Mac Mini Route, but I live in Canada and don't want to buy a touch screen from Hong Kong or the States because of the b.s. taxes and duties. So I decided to purchase an HP tx1218ca with a touch screen and the following specs.

    processor: AMD Turion (tm) 64 X2 mobile technology TL-58 1.90 Ghz

    memory: 958 MB

    System type: 32 bit

    Running Windows Vista Home Premium

    I would like to be able to dock and un-dock the laptop just like I was planning with the Mac Mini. I will most likely have to build a custom center console for this, but I am not worried about that.

    Could any of you provide some links with worklogs on this site or on the internet detailing proper powering of a laptop/laptop installation. I have installed full car audio systems which are straight forward to me, but computers are complex when intigrating into car audio and not really meant for car installation. So if any of you have any links in mind that would help me to understand what to do in my situation I would really appreciate it. All of my searches have landed me with worklogs with pics of wires and arrows all over the place, which just confuses me more. In the meantime I will continue searching.

    Thanks.

  2. #2
    Fusion Brain Creator 2k1Toaster's Avatar
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    Take a look at the power brick. You will see something like "110vAC-->15vDC @ 4A" or something. Then you can look at the Carnetix as see if it supplies enough current at the correct voltage.

    Also how opposed are you to soldering to your power button?
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    The brick shows as follows.

    Input: 100-120V~ 1.6A 50 - 60 hz
    Ouput: 18.5V "insert weird symbol dash mark with 3 tiny dash marks underneath" 3.5A LPS

    Also it says 65W.

    Now this is where I get confused. Do I just run a power wire directly from the truck battery with inline fuse to the Carnetix P1900, like I do with my car audio amps? How do I connect the P1900 to this brick and power cord? And honestly even though I am going to go the extra mile when fabricating a custom dash or center console for the laptop, I really don't want to open up this laptop, since it is a media player for my home theatre as well. Also if I, at some point feel this route isn't working out, because the touch screen isn't really as sensitive to finger input (U have to use your finger nail) I will do something else and use it just for home theatre.

    I just want to be able to dock the laptop into console or dash with out modding it. As far a shut down and turning it on, yeah it would be great to do it with the ignition, but it isn't that important, because i will be taking it out of the vehicle most of the time. I just want to make sure that I don't screw the lcd and other hardware because of poor power supply.

    Not sure if this helps U with the direction I am going. Thanks for the quick response.

  4. #4
    ATF
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    Targus and some other laptop accessory manufacturers make an auto/plane adapter. You could always buy one of those. They have a universal tip, that allow interchangeable tips for different laptop manufacturer's and models. You could pull up your center console, solder a new cigarette plug to the existing one, and tuck all of that underneath the console and just route the charging plug to wherever your laptop is.

    http://www.bestbuy.ca/catalog/prodde...98&catid=20182

  5. #5
    Neither darque nor pervert DarquePervert's Avatar
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    Quote Originally Posted by zaytser View Post
    The brick shows as follows.

    Input: 100-120V~ 1.6A 50 - 60 hz
    Ouput: 18.5V "insert weird symbol dash mark with 3 tiny dash marks underneath" 3.5A LPS

    Also it says 65W.
    The P1900 can power that.

    Now this is where I get confused. Do I just run a power wire directly from the truck battery with inline fuse to the Carnetix P1900, like I do with my car audio amps? How do I connect the P1900 to this brick and power cord?
    If you use the P1900, you don't use the power brick at all. The manual has the instructions for wiring the P1900.
    Basically, you run a line to the battery, a line to ground, and a line to an ignition-controlled line.

    And honestly even though I am going to go the extra mile when fabricating a custom dash or center console for the laptop, I really don't want to open up this laptop, since it is a media player for my home theatre as well.
    Have you considered how you're going to turn on the laptop eavery time? That is the single biggest hurdle for laptop isntallations where the user.

    I just want to be able to dock the laptop into console or dash with out modding it. As far a shut down and turning it on, yeah it would be great to do it with the ignition, but it isn't that important, because i will be taking it out of the vehicle most of the time. I just want to make sure that I don't screw the lcd and other hardware because of poor power supply.
    Do you have a docking station for the laptop?
    Is it a true docking station or a USB port replicator? USB port replicators are garbage, IMHO. They will not help you at all for what you want to accomplish.
    Have you looked in the FAQ yet?
    How about the Wiki?



    Under normal circumstances, a signature would go here.

  6. #6
    ATF
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    If you use the P1900 you have to cut up a powercord for your laptop (the section after the brick, before the laptop). Or find a plug that will work in the laptop and add your own wires to it.

    I think he's going to use the tablet itself as the touchscreen, so turning it off and on wont be a problem. Just lift the screen, press the power button and let it do its thing.

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    No I don't have a docking station for the laptop. In fact I am not even sure what to look for. I think the products I have seen at Best Buy are as you mentioned, "Useless." But I figured since this will be a custom console project, I would have to constuct my own way to dock the laptop, just not sure what to do. I just wanted a clearer picture of wiring for power and thank you for doing so.

    But this is all down the road for me, as I am thinking of making a skin for winamp since RR doesn't want to co-operate with Vista. And possibly just customizing my desktop to replicate a front end feel by changing icons to look like buttons etc.

    Thanks again.

  8. #8
    ATF
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    You could always slap in Windows XP instead

  9. #9
    Low Bitrate scottgs's Avatar
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    I just setup a TX1200 as my carputer. I used a carnetix 2140 and interfaced it to the HP quickdock. The quickdock is the way to go, about $80 on ebay. Works real well, just one connector and the laptop is free. It has 6 USB ports, VGA, power, etc. etc. I am not using hte HP's screen though, but a seperate 8" touchscreen.

    Radio Shack has the connector for the HP laptop power, fits perfectly. I don't remember the size right now, have it written down somewhere though. Also, if you are skilled, you can interface the carnetix ACPI leads to the on/off button on the quick dock to auto power up. Works fantastic, never misses a beat and the Carputer is always up and running, live nav and music in less than 10 seconds after ignition using RoadRunner as the frontend and IG3. I'm using a Globalsat MR-350 USB GPS, and even with the funky serial to USB adapter it always connects and resumes from standby hibernate with no problems.

    Let me know if I can help. I didn't take pics of the quick-dock connection, but it's not hard once you figure out how the thing comes apart. If there is interest, I'll post instructions here. PM me, as I'm not on here much this week. Working long hours.

    The only hurdle with the PC so far is living with Vista. Everything runs pretty much ok, and RR runs perfectly in Vista, except for the audio mixer. Going to have to work through that one.

  10. #10
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    Quote Originally Posted by scottgs View Post
    Radio Shack has the connector for the HP laptop power, fits perfectly. I don't remember the size right now, have it written down somewhere though.
    Have you found the connector number?

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