PC power using aircraft ground

[[email protected]]

I run a Motion LS800 for my EFB. I use a DC 12V to 19V power
converter to power my LS800 since I have a 12V aircraft system.

To minimize the number of wires, can I use a single wire to run +19V
from the power converter to LS800 and connect the ground from power
converter to LS800 thru the airfram ground?

Thanks in advance,

Robin Hou

[Bill Daniels]

" > wrote in message
...
>I run a Motion LS800 for my EFB. I use a DC 12V to 19V power
> converter to power my LS800 since I have a 12V aircraft system.
>
> To minimize the number of wires, can I use a single wire to run +19V
> from the power converter to LS800 and connect the ground from power
> converter to LS800 thru the airfram ground?
>
> Thanks in advance,
>
> Robin Hou

No answer on the ground wire but how do you like the LS800? Do you have the
"View Anywhere" screen and/or the SSD drive?

Bill D

[rmhou at yahoo.com]

On Feb 4, 6:26*pm, "Bill Daniels" <bildan@comcast-dot-net> wrote:

> No answer on the ground wire but how do you like the LS800? *Do you have the
> "View Anywhere" screen and/or the SSD drive?
>
> Bill D

I have been using Jeppview FliteDeck for 3 years now on an old laptop
with a cheap touch screen car monitor. Just got the Motion 2 months
ago. The LS800 w/ View Anywhere screen is more readable with a lot
less wires running thru my aircraft. Overall it is a plus compare
with my last setup. But the requirement of a stylist as the pointing
device is a drag. If I have to do it over, I will go with a
transreflective car monitor w/ touch screen like this:
http://store.mp3car.com/category_s/82.htm

I don't have the SSD drive. I have been to 11,500 for more than 2
hours without problem. I will switch to a SSD drvie on the first sign
of HD problem, or when I turbo normalize my airplane after I win the
lotto ;-)

[Bill Daniels]

"rmhou at yahoo.com" > wrote in message
...
On Feb 4, 6:26 pm, "Bill Daniels" <bildan@comcast-dot-net> wrote:

> No answer on the ground wire but how do you like the LS800? Do you have
> the
> "View Anywhere" screen and/or the SSD drive?
>
> Bill D

I have been using Jeppview FliteDeck for 3 years now on an old laptop
with a cheap touch screen car monitor. Just got the Motion 2 months
ago. The LS800 w/ View Anywhere screen is more readable with a lot
less wires running thru my aircraft. Overall it is a plus compare
with my last setup. But the requirement of a stylist as the pointing
device is a drag. If I have to do it over, I will go with a
transreflective car monitor w/ touch screen like this:
http://store.mp3car.com/category_s/82.htm

I don't have the SSD drive. I have been to 11,500 for more than 2
hours without problem. I will switch to a SSD drvie on the first sign
of HD problem, or when I turbo normalize my airplane after I win the
lotto ;-)

I'd been looking at the LS800 for use in my glider. The touch screen is not
ideal but it can be made to work. I've also thought about building my own
system. I have the software I want and the Via Pico ITX computer runs it
fine with little battery drain. The problem is a high visibility, low power
monitor. I haven't found one I like yet.

Bill D

[MikeMl]

wrote:
> I run a Motion LS800 for my EFB. I use a DC 12V to 19V power
> converter to power my LS800 since I have a 12V aircraft system.
>
> To minimize the number of wires, can I use a single wire to run +19V
> from the power converter to LS800 and connect the ground from power
> converter to LS800 thru the airfram ground?
>
> Thanks in advance,
>
> Robin Hou

Maybe! To step 14V up to 19V takes a switching power supply, some
switchers use transformer coupling, so they have no connection from the
input side to the output side. Others have a common connection between
input and output. Is the common connection between the input minus and
output minus? It would take a look at the schematic or an Ohmmeter to
find out.

I wouldn't use the airframe as one side of the power feed to the power
converter or the LS800. Switching supplies have a nasty habit of
creating noise in aircraft audio systems due to ground loops that may
exist between two parts of the airframe where audio items are grounded.
Witness all the problems folks have with alternator whine and strobe
squeal in their headphone audio.

--
MikeML, Skylane, Pacer

[clare at snyder.on.ca]

On Mon, 4 Feb 2008 19:26:44 -0700, "Bill Daniels"
<bildan@comcast-dot-net> wrote:

>
" > wrote in message
...
>>I run a Motion LS800 for my EFB. I use a DC 12V to 19V power
>> converter to power my LS800 since I have a 12V aircraft system.
>>
>> To minimize the number of wires, can I use a single wire to run +19V
>> from the power converter to LS800 and connect the ground from power
>> converter to LS800 thru the airfram ground?
>>
>> Thanks in advance,
>>
>> Robin Hou
>
>No answer on the ground wire but how do you like the LS800? Do you have the
>"View Anywhere" screen and/or the SSD drive?
>
>Bill D
>
The short answer to the ground question is "yes"

--
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