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Thread: Power supply

  1. #1
    Newbie Gn0MiCK's Avatar
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    Lightbulb Power supply

    I'm new to this forum, so hello everybody!

    Anyway I want to build my own carputer too, and the only thing I can't understand is the power supply matter.
    Can't I just take a power from the cig, and connect it to the board and HD?

    Sorry for my ignorance with electricity.

  2. #2
    FLAC Mastero's Avatar
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    Sure if you wanna celebrate 4th Of July early

    Search the forum there is tons of information about PSU.

    Mastero

  3. #3
    Newbie Gn0MiCK's Avatar
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    Cool

    hehe, well I have looked around, and those guides getting too technical.
    And about this PSU - if I recall correctly its costs some.. I need somthing cheap, that wont make me celebrate with firewrodks, as you said

  4. #4
    Newbie Gn0MiCK's Avatar
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    Question Let me ask you that way:

    I have a pentium3 mother board and a chip about 1000Mhz, SB o/b and and HD. I think I will use an LCD ASCI screen, with some help of a friend.
    What are my options to supply power to that system?

  5. #5
    Low Bitrate BrUTaL's Avatar
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    Not to sound like an expert, which I'm not; but you need to know that building a carputer is not as easy as you think. There are many things that you need to be aware of, and you have many options for power supply, but there are advantages and disadvantages for each of them. I think you need to take you time and read the forums, there is section jyst about power supply. Read them all, and then think about it again. Not to turn you off on building your carputer, but I think you are rushing. There is many options, but the best is to find one that has everything, but since you are in a budget, I think that will be very difficult. I'm new to the forums, but I have been reading a lot so I recommend you doing the same. Building a carputer is not the same as building your home dekstop computer. Althought it uses many of the same parts, there are differences that you need to know about.

  6. #6
    Newbie Gn0MiCK's Avatar
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    As I said I did look around, but didn't understand much about the power supply.
    Anyway I took a look on the power supply in my desktop computer, and I found out that its outputs about 5v or somthing like that to each line(e.g. board, HD, CD). Can't I just use a tranformator(or somthing like that) that will be pluged into the cig socket and will output 2 lines of the power I need?

  7. #7
    Newbie komarak's Avatar
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    Lightbulb

    Quote Originally Posted by Gn0MiCK
    As I said I did look around, but didn't understand much about the power supply.
    Anyway I took a look on the power supply in my desktop computer, and I found out that its outputs about 5v or somthing like that to each line(e.g. board, HD, CD). Can't I just use a tranformator(or somthing like that) that will be pluged into the cig socket and will output 2 lines of the power I need?
    Your ATX power supply on your desktop computer puts out LOTS of voltages (+/- 5VDC, +/- 12 VDC, 3.3 VDC, 5VSB, etc) - your cig socket only puts out +12VDC - or really +8VDC to +14.5VDC or so depending on your charging system. You have to "convert" (transformers are used for AC - Alternating Current - applications) the 12VDC to all of the other voltages. Search the forums - ther are 2 primary ways to do that in a car application:

    1) Use a 12VDC to ATX converter Board - I found mine on eBay for $30. This does a direct conversion (very efficient - ie. less heat) to the ATX standard voltages you will need for your MB, HD, CD/DVD etc.

    2) Use a 12VDC to 120VAC inverter then your standard ATX power supply. This does a double conversion (DC -> AC -> DC) - not very efficient - sometimes ignition noise is a problem.

    Good Luck

  8. #8
    Newbie Gn0MiCK's Avatar
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    Wink I think I'm getting the picture

    1) Use a 12VDC to ATX converter Board - I found mine on eBay for $30. This does a direct conversion (very efficient - ie. less heat) to the ATX standard voltages you will need for your MB, HD, CD/DVD etc.
    So this is kind of an electric circuit that it's input is not regulated(8-14V like the cig socket), and outputs directly to the things that I want to turn on(HD and board), a regulated current about 5V or so?

  9. #9
    Newbie Gn0MiCK's Avatar
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    hey look at this: http://cgi.ebay.com/ws/eBayISAPI.dll...category=32814
    Can I use it and just connect the computer to the output and it will work?

  10. #10
    Newbie komarak's Avatar
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    Quote Originally Posted by Gn0MiCK
    hey look at this: http://cgi.ebay.com/ws/eBayISAPI.dll...category=32814
    Can I use it and just connect the computer to the output and it will work?
    Kind of overkill - 300 Watts - but it should work with your desktop system. Just plug it in to the 12VDC cig socket and plug your 120VAC computer into it and you should be good to go.

    With 300 Watts continuous you should be able to run several of your friends computers !!

    Good Luck

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