Mark,
I was thinking more of the phone designer's
tradeoffs. Larger screen, more power for same
brightness per square centimeter in the
backlight. A 5"screen has 56% more area than a
4". I've noticed in the specs that the larger
screens generally have lower brightness.
The phones have very fancy power management
schemes (for better battery life on a full
charge) which are substantially negated by
leaving the backlight on full brightness and by
running the processor to constantly update the moving map.
Yes, you should run the phone/PNA whatever from
ship's supply. Darryl is right about power
supplies. Some are terribly noisy. Erich
Wittstock found one from Seedstudio that appears to be quiet. See:
<http://www.seeedstudio.com/depot/CPTC5-power-converter-12V24V-switch-to-5V-p-1066.html>
CPT-C5 power converter 12V/24V switch to 5V
<http://www.seeedstudio.com/depot/CPTC5-power-converter-12V24V-switch-to-5V-p-1066.html?cPath=1>CPT-C5
power converter 12V/24V switch to 5V
SKU: 313080006
I bought 5 but shipping wasn't all that cheap
which substantially increased the landed cost.
Mike
t 10:19 AM 4/5/2016, you wrote:
On Apr 3, 2016, at 10:11 AM, Mike Borgelt
<[email protected]> wrote: > About
a 5" screen. There is a tradeoff between screen
size, backlight capability and power
consumption. You may be better off with a
smaller screen that has more contrast. Provide a
USB port on the panel supplied by shipâs power
to worry less about power consumption (or, more
accurately: to move the power consumption issue
somewhere else :) - mark
_______________________________________________
Aus-soaring mailing list
[email protected]
http://lists.base64.com.au/listinfo/aus-soaring
Borgelt Instruments - design & manufacture of
quality soaring instrumentation since 1978
www.borgeltinstruments.com
tel: 07 4635 5784 overseas: int+61-7-4635 5784
mob: 042835 5784 : int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia
_______________________________________________
Aus-soaring mailing list
[email protected]
http://lists.base64.com.au/listinfo/aus-soaring
