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Thread: DC-DC device ?

  1. #1
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    DC-DC device ?

    Planning to make my carputer one day... I was thinking about a powersupply...
    when I found a little device (normally used for carkits or something like that)

    The Details:

    Overvoltage Protection
    Input:12/24 VDC
    Output: 12VDC

    12/24 Max: 5amp continu
    24/12 Max: 5amp 1 min.


    Is this something I can use for a stable 12volt source in my car ?

  2. #2
    Variable Bitrate
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    nope

  3. #3
    Jesus Freak antimatter's Avatar
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    It will only work for regulating your 12v line. Your power supply must provide other voltegas aswel.

    What this will enable you to do (if it is cheap) is to connect a cheap PSU (the cheap ones don't regulate the 12v rail) and have it work fine without damaging any 12v devices.

    I don't know if the amps are enough though
    -Jesus- King of Kings Lord of Lords

  4. #4
    Variable Bitrate
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    What kind of mobo are u planning to get?

  5. #5
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    I'm planning to build just a simple carputer for mp3 use. Like an ALCAS system.
    I have some old AT and ATX mobo's I can use.

  6. #6
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    Planning for carputer needs to include doing a little math on the power consumption side of it. Gather all the components you plan on using in the system. Calculate the power consumptions, then you make a decision about the power supply. http://www.mini-box.com has a little power calculator that you can kinda use for your calculation. They also have a quite comprehensive paper on carputer's power requirements.

  7. #7
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    I checked the link, but its for new hardware only , no old AT based mobo's there

    I checked the dude from ALCAS his powersupply
    +5V / 5A -5V/0.2A (Step-down)
    +12V / 2A -12V 0.2A (Step-up and Step-down)


    So correct me if I'm wrong:

    If I use one of my devices for the 12V line (5A continu), that would be enough I suppose.
    Than If I use another device (the same 12V thing) , and build a voltage divider with some resistors to get the 5V line.
    Would that be ok already ?
    (off cource nevermind the negative lines for now...)

  8. #8
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    I was aware that the link didn't have any info for AT mobo. I mentioned about the calculator so you could calculate the loads (devices) you'd be putting on the power supply.

    Anyway, so you're planning to use that power supply to power only your devices, then? Not mobo + devices?

    If only for the devices and you have done your math right then it should b ok.

  9. #9
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    And u think I have to low power for using it for my mobo ?

    The ALCAS dude, had enough I suppose

  10. #10
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    Do you have a link to this 12v supply?

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