Running a 12V computer from the automative electical system

Discussion in 'Automotive Electronics' started by alloverio, Jan 3, 2018.

  1. alloverio

    Thread Starter New Member

    Jan 3, 2018
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    I am looking at traveling and I need to run a small fanless computer on board. I am looking at this ...

    http://www.qotom.net/goods-126-Q180S++Q190S+(S02)+Bay+Trail+Mini+PC.html

    These unites are 12V, 10W average, but I think they burst up to 30W. Their power supplies are rated 12V 4A.

    What options do I have and what might be the best option to provide a regulated 12V, 4A power output from the variable automotive electrical system?

    Thank you.
     
  2. MrSoftware

    Well-Known Member

    Oct 29, 2013
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    alloverio likes this.
  3. alloverio

    Thread Starter New Member

    Jan 3, 2018
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    MrSoftware likes this.
  4. alloverio

    Thread Starter New Member

    Jan 3, 2018
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  5. ian field

    AAC Fanatic!

    Oct 27, 2012
    6,172
    1,115
    The automotive electrical environment can be a bit noisy - spikes as high as 68V aren't all that unlikely.

    The battery could sink as low as about 11V - the alternator will try to get it up to about 14.4V, but over voltage faults aren't totally rare.

    The text book route is a buck/boost converter - and you need to protect that from the spikes.

    Converting up to mains voltage and using a regular PSU block is probably the safest option, but it wastes more energy.
     
  6. debe

    AAC Fanatic!

    Sep 21, 2010
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