Don,
I am going to assume this for your own aircraft, not a club
aircraft modification.
My experience is that the best result comes from powering your iPAQ from the
Vario that also provides your
GPS and air-data. Initially we set up with the USB Cigarette adaptor wired
through the main switch bus bar, fused
and secured under the panel with just the end of the cord in the cockpit
area, it worked but we did experience iPAQ
shutdown due to over heating from time to time. The long term plan was to
purchase a Vario the provided power, GPS
and air data to the PDA. This was completed about 6 months ago and we are
very happy with the outcome. We are
getting the most out of our software and neither of us have experienced an
iPAQ shutdown due to overheating since :-)
SDF
_____
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Geoff
Vincent
Sent: Sunday, 13 April 2008 6:05 PM
To: Discussion of issues relating to Soaring inAustralia.; Discussion of
issues relating to Soaring inAustralia.
Subject: Re: [Aus-soaring] USB power for Ipaqs
Don,
It looks like you have got the right advice from Robert. I have recently
been through the exercise and have placed a 12v to 5.3v DC converter between
the glider 12 volt supply (a pair of 7.2 Ah gel cells) and a fused/switched
2.1 mm pin socket mounted in the panel. This socket normally provides power
for the iPAQ 5550, but can also be used to run (or charge) a Blue-Tooth GPS
or my CDMA mobile phone, depending on priorities at the time. If you're
going to put in a system make it as flexible as possible.
Regards,
Geoff V
At 05:29 PM 13/04/2008 +1000, Don Woodward wrote:
Hi Robert,
Thanks for your advice. The HP ipaq I have also does Tom Tom navigation on
my car so it spends most of its time on my windscreen. Because it already
has an internal gps I don't intend connecting an external one to it. The USB
currently plugs into a cigarette lighter adaptor and then runs of my cars 12
volts. I want to plug it into my glider but without the cigarette adaptor.
I think I need to find what voltage is powering it first.
Regards
Don.
----- Original Message -----
From: Robert Hart <mailto:[EMAIL PROTECTED]>
To: Discussion of issues relating
<mailto:[email protected]> to Soaring in Australia.
Cc: [EMAIL PROTECTED]
Sent: Sunday, April 13, 2008 4:59 PM
Subject: Re: [Aus-soaring] USB power for Ipaqs
Don Woodward wrote:
Hi all,
I'm in the process of putting an ipaq into my glider. My ipaq uses a USB
cable for all power/data etc.. It has the smaller plug on the unit and the
larger (normal) USB plug into the power source. I want to chop off the
larger plug so I can run the lead straight off the panel.
The USB cable has copper, silver, red, black, green and white wires. It's
probably obvious but "just in case" can someone please confirm that the
black is negative power and the red is positive power? I don't want to blow
my HP Ipaq up, I have been caught out before!
can
Don
You need to be very careful - all iPaqs that I know about do NOT use 12v -
they use about 5.3v (iirc). So you cannot connect the glider 12v supply to
power your iPaq - at least not directly.
What I did for my (original) set up was
* Take the GPS and iPaq you will be using to someone like Johnny Appleseed
- (they are here in Brisbane and I think elsewhere as well).
* From the dealer, buy a premade cable that plugs into your GPS and your
iPaq - and also has a 12v car charger to provide power to both. If you are
using FLARM as the source, you don't have to power that specially, but you
will need to do a bit of soldering to get the data from the FLARM to the
iPaq.
* Remove the innards of the 12v to 5v power supply and buy a small project
box from Dick Smith to hold this. Connect the glider 12v on the input side
and you are done.
--
Robert Hart [EMAIL PROTECTED]
+61 (0)438 385 533 http://www.hart.wattle.id.au
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