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Thread: MP3 Laptop LCD backlight Power.. USB?

  1. #1
    Newbie
    Join Date
    Jul 2001
    Location
    Atlanta, GA
    Posts
    6

    Lightbulb MP3 Laptop LCD backlight Power.. USB?

    Hello all!
    I started looking into an MP3 car player a short while ago and realized that I have alot of the makings under my nose.
    • Tecra 8000 laptop with a 10gig hd
    • x10 Mouse Remote
    • Pioneer reciever (takes in Changer cable)
    • 80gig hard drive mounted in a mobile rack
    After realizing what I have, I impulsively began reading and buying and for less than $50 on ebay
    • DC-DC Power Adapter (for car or air)
    • docking station
    • pioneer p-bus cable
    • *free* data international 4x40 LCD display


    I realized that I wanted to display the winamp info using win2k because with my laptop I could just go on standby for days at a time. I also thought I could do a color LCD display, but they are so expensive.

    As soon as I began thinking about this project I came up with some great ideas.
    • I took apart my laptop to see how the *extremely thin* keyboard was wired in and to see how the LCD display was wired in..
      why?
      Well, how about just rewiring the 14.1 display and mounting it? and same with the ultra thin keyboard?
    • I also got the 4x40 display and figured that I can mount it in the dash, in empty spot underneath my radio.
    I downloaded some software (max10) to work with the mouse remote, and I tested it and it works nicely. And the Rodeo it is gong in is big, so there are lots of places to put stuff.

    I quckly began to see a concern because power to most standard LCD displays seem to have pretty in-depth wiring, and I don't know how to wire mine exactly, and I am not ver familiar with circuit boards (my circuit boards class is next semester).

    Most of the LCD displays discussed are wired into PC and my laptop will be removed everyday (hence a reason for the docking station). So other people can control the voltage with their PC's power.

    I noticed that on the eio website there are some cheap attachments that can help the wiring process. Unfortunately, my ignorance of power, circuit boards, etc. makes this information useless to me.

    My questions to you, is
    • I need to find a way to convert my LCD's power to work in my car. I believe, according to the schematics:
      (excluding backlight)
      4.5-5.5 volts
      .60mA
      (backlight)
      8 reverse voltage?
      Forward Current 515mA

      The way I see it, the display will use the printer port for power, but the backlight needs current from elsewhere with the two pots controlling contrast and brightness.
    • Will my power converter (DC-DC 15V-12V car) work? Will I have a problem with noise?
    • Can I simply extend the cords for my laptop's LCD and Keyboard and mount them in my car?
    • Does anyone have any strong advice for my project?


    I admit my ignorance from the start, so it may be neccesary for me to understand the basics of electricity that I don't know. Please help me to understand your response with the understanding that I don't know different aspects of electricity does (current, impedence, etc.)

    Thank you for any and all help.

    [ 07-31-2001: Message edited by: Georgia Tech Geek ]

    [ 08-08-2001: Message edited by: Georgia Tech Geek ]
    Isuzu Rodeo
    [list=a][*]Toshiba Tecra 8000[*]Docking Station[*]Pioneer Controller cable (modified)[*]maX10 mouse remote (x10)[*]Data International 4x40 LCD[*]laptop power converter[*]Mobile Bay w/80gig harddrive[/list=a]
    http://www.vigils.net/users/christopher

  2. #2
    Constant Bitrate
    Join Date
    May 2001
    Posts
    128

    Post

    Does anyone have any strong advice for my project?
    Yes. My advice would be to not take apart such a nice laptop. The 14.1 screen will be way too large and as for the keyboard...its not worth the trouble. If I were you I would sell the laptop for a decent amount, put my system together from scratch. How do you plan on using the 80 gb hard drive in a laptop anyhow? Having a conventional computer will also make it a lot easier to hook up your lcd as you can grab a +5v power source right from your power supply (the red wire). Also, don't be confused. The backlight only uses one pot for controlling brightness. The other pot is used in conjunction with the hd44780 controller itself to set contrast.

    Of course, it is possible to extend your laptop keyboard and screen-but why rip apart such a nice notebook? It's up to you I guess. Good luck.
    Athlon 500, 128 MB, ATI Xpert 4MB AGP TV-Out, Sound Blaster Live! Value, 8.4 GB, 2x20 Backlit LCD, Keypower 250 Watt ATX DC-DC, DSchmitd Startup/Shutdown Controller, IRMan + Backlit IR Remote, Custom Keypad, 5.6" NTSC LCD, In-Dash Slot Loading DVD, all installed in an '87 Honda Accord LX-i

  3. #3
    Newbie
    Join Date
    Jul 2001
    Location
    Atlanta, GA
    Posts
    6

    Post

    Thanks for the input, I am actually looking at buying a seperate keyboard and LCD that works with the same model.

    I could use some quick-connectors to be able to change back and forth, therefore keep the portability of the laptop.

    Thanks again, and I will consider your input. I also like the idea of using a low voltage computer, seems I am saving money on efficiency

    Christopher Vigil
    Isuzu Rodeo
    [list=a][*]Toshiba Tecra 8000[*]Docking Station[*]Pioneer Controller cable (modified)[*]maX10 mouse remote (x10)[*]Data International 4x40 LCD[*]laptop power converter[*]Mobile Bay w/80gig harddrive[/list=a]
    http://www.vigils.net/users/christopher

  4. #4
    FLAC
    Join Date
    Aug 1999
    Location
    Upper Marlboro, MD 20772
    Posts
    1,311

    Cool

    I will STRONGLY go suggest you go study my current setup to get more some idea. It seems you have think things through and now u want to execute on it. Study my setup(s) and maybe CobraII/III.

    Good luck
    abcd-1
    Author of CobraI,II,III and now CobraIV.
    You can contact me on AOL instant messenger....nick is cenwesi or cenwesi3

  5. #5
    Newbie
    Join Date
    Jul 2001
    Location
    Atlanta, GA
    Posts
    6

    Post

    Follow up..

    I am wiring my LCD and no nothing of wiring. I can't imagine hooking up the wires into my LCD display without hookups (like a plug with pins etc).

    How do I hookup wires to this thing.. I mean.. I have the schematics.. but I dunno.. and what about getting power for the backlight?

    Like I said this is a laptop.. so there aren't any handy-dandy plugs for 5volts..
    What I am intending on doing is using the USB port for power.

    Help me. Thanks..
    Christopher Vigil
    Isuzu Rodeo
    [list=a][*]Toshiba Tecra 8000[*]Docking Station[*]Pioneer Controller cable (modified)[*]maX10 mouse remote (x10)[*]Data International 4x40 LCD[*]laptop power converter[*]Mobile Bay w/80gig harddrive[/list=a]
    http://www.vigils.net/users/christopher

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