Results 1 to 7 of 7

Thread: OK I think I have figured it out

  1. #1
    Low Bitrate
    Join Date
    Mar 2002
    Posts
    103

    OK I think I have figured it out

    Forgive me guys but I am a little slow when it comes to dealing with electricity, but after some searching and dicussions with RUSS, I think I have found a solution to power laptop, and 2 LCD's in my 2000 Durango. I already have 3 DC lighter/accessory plugs in my SUV so this is a plus. SInce my laptop and 2 LCD's are already DC powered devices, then using an inverter is kind of senseless correct? I already have an auto/air adapter for the laptop to plug into one of the DC jacks. With that in mind can I use the following to power my LCD's (They have a 2 wires, red and black, used to power them)?

    PLUG

    The LCD's are rated at 12V+/-10% <700Ma and this plug is rated at 6amps, so more amps on the plug the better correct?

    If I wanted to plug the Laptop and both LCD's into 1 DC jack could I then use the following to acheive this?

    3 Plug DC adapter .

    Finally with the total load being less than 5Amps between the 2 lcd's and the laptop, how much of a drain will occur on my battery. I remember reading somewhere that my batter should have about 45-60 AMPS total, is this true, and if so how many get used at one time, generally speaking.

    As always thnks in advance for you input.

    OK quick edit, I did another search and I guess I was way off on the battery's amperage. That should have been 450 - 600 amps on the battery. I guess I'm thinking about how much can each DC lighter/accessory plug handle?

  2. #2
    Variable Bitrate Cherub211's Avatar
    Join Date
    Feb 2004
    Location
    Chandler, AZ
    Posts
    326
    Sounds like that'll work (as long as your math is correct), you won't have to worry about the power drain while the vehicle is running so don't worry about that. And I don't have the math in front of me to determine battery life while the vehicle is off. I wouldn't try to run anything for too long though while the car is off.

  3. #3
    Low Bitrate
    Join Date
    Mar 2002
    Posts
    103
    Quote Originally Posted by Cherub211
    Sounds like that'll work (as long as your math is correct), you won't have to worry about the power drain while the vehicle is running so don't worry about that. And I don't have the math in front of me to determine battery life while the vehicle is off. I wouldn't try to run anything for too long though while the car is off.
    Thanks for the reply Cherub211. My math comes directly for the manufacturers specs so I think I'm ok there. In regards to running the system with the truck not running, that really would never be an issue so I'm not too concerend with that at this point.

  4. #4
    Low Bitrate
    Join Date
    Mar 2002
    Posts
    103

    OK..maybe i havent

    In the above post, will I run into a problem with this plug? Will this send unregulated power to the LCD's? If so would I be better off using one of these?

    PLUG # 2

    If so how is the power regulated when using these, through the tips?

  5. #5
    Variable Bitrate Cherub211's Avatar
    Join Date
    Feb 2004
    Location
    Chandler, AZ
    Posts
    326
    No... that should work... you might want a fuse or something, I think plug#2 has a built in fuse.... but it should work with plug #1 too.

  6. #6
    Newbie
    Join Date
    Dec 2003
    Posts
    3
    Quote Originally Posted by berniejr
    Finally with the total load being less than 5Amps between the 2 lcd's and the laptop, how much of a drain will occur on my battery. I remember reading somewhere that my batter should have about 45-60 AMPS total, is this true, and if so how many get used at one time, generally speaking.

    As always thnks in advance for you input.

    OK quick edit, I did another search and I guess I was way off on the battery's amperage. That should have been 450 - 600 amps on the battery. I guess I'm thinking about how much can each DC lighter/accessory plug handle?
    You were right the first time. Your Durango battery is good for 45-60 amp hours. This means that at 5 amp draw, it will be completely dead in 9-12 hours. Plenty of time.

    The 450-600 amp figure you probably found is the CCA or cold cranking amps rating of the battery. When the starter cranks the engine this is the maximum current that the battery can provide for 5-10 seconds.

    What matters to you in this application isn’t the CCA but rather the “reserve capacity”.

  7. #7
    Low Bitrate Pepe's Avatar
    Join Date
    Jul 2003
    Location
    Kingston, Ontario, Canada
    Posts
    60
    Quote Originally Posted by berniejr
    In the above post, will I run into a problem with this plug? Will this send unregulated power to the LCD's? If so would I be better off using one of these?

    PLUG # 2

    If so how is the power regulated when using these, through the tips?
    Unregulated power isn't as big an issue with most LCD's as it is for computers. The LCD I just bought off Digitalww is rated for between 11 and 14.4VDC.

Similar Threads

  1. Replies: 12
    Last Post: 07-14-2003, 04:12 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •