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                           Avionics-List Digest Archive
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                     Total Messages Posted Thu 01/20/05: 1
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Today's Message Index:
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     1. 07:22 AM - Re: Re: Avionics-List Digest: 4 Msgs - 01/17/05  (Fred Fillinger)
 
 
 
________________________________  Message 1  _____________________________________


Time: 07:22:22 AM PST US
From: "Fred Fillinger" <n3eu@comcast.net>
Subject: Re: Avionics-List: Re: Avionics-List Digest: 4 Msgs - 01/17/05

--> Avionics-List message posted by: "Fred Fillinger" <n3eu@comcast.net>

> --> Avionics-List message posted by: LClark6372@aol.com
>
> hi to all
>  does anyone out there have any take on what power requirements i
might need
> to drive a mini computer from my airplane batteries/alternator.  i
am having
> problems running a moving map  program and a engine data display
program once
> its connected to the bus with the engine running.....runs fine with
battery
> through a inverter/transformer ( dc to ac to dc)or by plugging in
110/120 ac(
> wall outlet) to dc via power adapters.
>

Rough guess, but if your portable computer expects 12VDC to power
and/or charge it from a brick on the 110V AC cord, then the airplane's
14V DC is too (alternator) noisy for it, and/or the extra 2V ain't
helping either.  Whether 12 or 14 volt, these bricks can be fancy
switching power supplies, whose output is fairly clean.  It could also
be that the airplane's bus might not be excessively noisy, were it not
for a defective diode in the alternator.

Reg,
Fred F.