Re: [SURVPC] Using a SurvPC to make a car MP3 player

[Mike Millen]

<re: running a pc from car electrics>

  pippi> Why need this?  Why not simply splice the wires that would come
  pippi> from the power supply into the appropriate sorts of wires on the car?


At best it just won't work... if you're unlucky you'll blow the computer.

The PC needs +12v, -12v and +5v. All these voltages need to be very
accurately regulated (to within 0.3v at the worst). All you will get
from the car is a voltage of somewhere between approximately +12v and +15v.

You need a "switching power supply", just the same as the PC one, but a
version designed to use 12-15v DC instead of 110/220v AC.

If you *really* want to use a computer in a car get a laptop. These
normally have a "12v" DC input for just such occasions.

Good Luck,
Mike


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