Today's Message Index:
----------------------
1. 04:47 AM - Re: B-787 Li-Ion battery story continues (Jan de Jong)
2. 04:55 AM - Re: GNS-650 Installation Manual (Eddy)
3. 05:56 AM - Re: Re: An opportunity too good to miss . . . (Bill Boyd)
4. 06:30 AM - Re: B-787 Li-Ion battery story continues (Robert L. Nuckolls, III)
5. 06:37 AM - Re: De-Slumpifier, Voltage Buffer to Prevent Brownout (user9253)
6. 07:03 AM - Re: De-Slumpifier, Voltage Buffer to Prevent Brownout (Eric M. Jones)
7. 09:24 AM - Re: Charge battery thru Ground Power Jack (user9253)
8. 10:23 AM - iPad charger? (donjohnston)
9. 11:34 AM - Re: iPad charger? (Jared Yates)
10. 11:55 AM - Re: Re: De-Slumpifier, Voltage Buffer to Prevent Brownout (Robert L. Nuckolls, III)
11. 12:10 PM - Re: iPad charger? (Eric Page)
12. 12:17 PM - Re: iPad charger? (Dennis A Glaeser)
13. 12:29 PM - Re: Charge battery thru Ground Power Jack (CHARLES T BECKER)
14. 12:51 PM - Re: iPad charger? (H. Marvin Haught Jr.)
15. 01:12 PM - Question on pwr. dist. diag. Z-19 (Fred Klein)
16. 01:16 PM - Re: iPad charger? (Eric Page)
17. 01:19 PM - Re: iPad charger? ()
18. 01:45 PM - Re: iPad charger? (H. Marvin Haught)
19. 01:49 PM - Re: iPad charger? ()
20. 01:49 PM - Re: iPad charger? (Scott R. Shook)
21. 02:06 PM - Re: iPad charger? (H. Marvin Haught)
22. 02:09 PM - Re: iPad charger? (H. Marvin Haught)
23. 03:10 PM - Re: iPad charger? ()
24. 03:10 PM - Re: iPad charger? (MLWynn@aol.com)
25. 03:17 PM - Re: iPad charger? (earl_schroeder@juno.com)
26. 03:44 PM - Re: iPad charger? (H. Marvin Haught)
27. 05:49 PM - Re: iPad charger? (Eric Page)
28. 06:10 PM - Re: iPad charger? (William Greenley)
29. 07:33 PM - Withdraw Question on pwr. dist. diag. Z-19 (Fred Klein)
30. 07:41 PM - Re: Withdraw Question on pwr. dist. diag. Z-19 (Robert L. Nuckolls, III)
Message 1
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| Subject: | Re: B-787 Li-Ion battery story continues |
I am puzzled by the article of the recent addition, that states that a
li-ion battery is especially prone to destructive thermal runaway when
discharged.
I do not believe this is true, on the contrary.
Jan de Jong
On 10/10/2013 5:03 AM, Robert L. Nuckolls, III wrote:
> <nuckolls.bob@aeroelectric.com>
>
> I've published a compendium of articles on the B787
> battery story at:
>
> http://tinyurl.com/ag2e9xk
>
> but in particular, there's a recent addition that
> adds a lot of useful information
>
> http://tinyurl.com/lyc5845
>
Message 2
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| Subject: | Re: GNS-650 Installation Manual |
GTN
Garmin Touchscreen navigator.
Eddy Fernandez
On Oct 9, 2013, at 10:02 PM, Kelly McMullen <kellym@aviating.com> wrote:
>
> The product is GTN650 and 750, and variants that delete com and or vor receivers.
> The GNS products were previous generation models.
> Kelly
> On 10/9/2013 6:54 PM, Robert L. Nuckolls, III wrote:
>>
>> At 09:45 PM 10/8/2013, you wrote:
>>>
>>> I would be happy to send copy to Bob's on line collection of manuals.
>>> Kelly
>>
>> Kelly, the link you sent got me a manual on the GTN600/700 series
>> devices. Was this an error on Fred's part? Is there such a thing
>> as a GNS-650?
>>
>>
>> Bob . . .
>>
>>
>>
>>
>
>
>
>
>
>
Message 3
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| Subject: | Re: An opportunity too good to miss . . . |
Indeed they did. Godspeed, Bob.
-Bill Boyd
On Wed, Oct 9, 2013 at 11:48 PM, <speedy11@aol.com> wrote:
> Congrats, Bob.
> Cessna got the best end of that deal!
> Stan Sutterfield
>
> Time: 05:27:47 PM PST US
> From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
> Subject: AeroElectric-List: An opportunity too good to miss . . .
>
>
> It's official. Cessna has made me an offer that
> was just too good to go begging - I'll be work
> there as a contractor next week for sure, possibly
> sooner.
>
> I'll be spending three nights a week in Wichita
> away from distractions like workshops, bins
> full of parts, and too many tools. This will be
> used to get some writing projects under way,
> . . . not the least of which is Rev 13 to the
> 'Connection.
>
> This is kind of exciting. Cessna has continuously
> evolved and expanded on capabilities that
> Beech and Cessna shared about 25 years ago.
>
> Somewhere along the road, powers at Beech decided
> they could purchase that work product. They let
> all of their labs and skunk-werks facilities go.
>
> This will be the third time I've worked for Cessna.
> The first time was on the 310/320 production line
> wiring the nose wheel well. That was 50 years ago!
> Worked that job for one week and gave them two
> weeks notice . . . I got a short tour of the Cessna
> electronics design and development facilities that
> really got the juices going!
>
> My daytime activity on the List will be limited Mon-
> Thurs but we can make it work.
>
>
> Bob . . .
>
> *
>
> *
>
>
Message 4
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| Subject: | Re: B-787 Li-Ion battery story continues |
At 06:46 AM 10/10/2013, you wrote:
>
>I am puzzled by the article of the recent addition, that states that
>a li-ion battery is especially prone to destructive thermal runaway
>when discharged.
>I do not believe this is true, on the contrary.
Can you elaborate? I've read from several sources that
the Li-Ion technologies are at greatest risk for unhappy
thermal events when they're discharged and then RECHARGED
without regard to their special needs.
The cell's tendency to dissipate heat internally is highest
when at a low state of charge (a state if higher internal
resistance?) is combined with legacy recharge philosophies
for allowing say a 60A alternator to run essentially full-bore to
bring the battery back up to full charge.
Hence, the "special chargers" that plug into dedicated
connectors on some products for the purpose of achieving
a fully charged battery after deep discharge.
I think this is the condition being described in the
article. It's also a condition that seems to be ignored
the literature by some suppliers of Li-Ion products.
It's a fundamental question to be explored about the
suitability of an Li-Ion product as a drop-in, plug-n-play
replacement for a lead-acid battery.
Boeing seems to have given due diligence to this
phenomenon by stating that a battery allowed to discharge
below some value is considered 'scrap' . . . hence the
multiple replacements of batteries in the field . . .
batteries that were retired much too early. I wonder if
these were 'recycled' in any way . . . perhaps returned
to a battery lab where they were carefully recharged and
perhaps returned to service?
I think I've read elsewhere that some suppliers of
commercial off the shelf Li-Ion batteries suggest that
a battery not be discharged below 30% of full capacity.
If this is good advice, then one would want to (1) either
select new batteries with 30% more headroom for capacity
in the endurance mode and then monitored for load-shedding
at 30% and/or (2) take extra care in recharging the
battery should you take it down too far . . . don't let
your alternator do it.
Our friends at Cessna are still sifting the simple-ideas
that drive this technology. I'll be working in the same
building with these folks which may add to my own
understanding along with some simple-ideas that can be
shared. Got to be careful here. Contractors
and employees alike sign non-disclosure agreements. But
no doubt, the simple ideas that drive the physics of
battery performance are not going to be any kind of
'secret' . . . these are the ingredients that drive
risks and successes in the marketplace and will have
to be well understood by everybody. There is still much to
learn my friends. I'll remain cautious with any advice I
have for dropping this technology into an OBAM aircraft.
Setting airplanes on fire is really bad for business.
Bob . . .
Message 5
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| Subject: | Re: De-Slumpifier, Voltage Buffer to Prevent Brownout |
> Garmin could have foreseen this and designed their
> inboard supply to accommodate the real-world of
> vehicular DC power systems.
Actually it is a Dynon D-180, not Garmin. To be fair, the D-180 has an optional
internal Li-ion backup battery which prevents brownouts. My backup battery
died.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=410212#410212
Message 6
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| Subject: | Re: De-Slumpifier, Voltage Buffer to Prevent Brownout |
Joe, Thanks for testing the DeSlumpifier.
Bob, Thanks for your comments.
Putting in a DC-DC booster is possible, but it wouldn't be my design choice.
IMHO-- I think that merely adding capacitance may do the trick. When the capacitors
discharge, they slump depending on the load requirements. When the battery
is at low voltage, the caps may not be charged up to a point where they can
supply enough energy for long enough to prevent rebooting.
Adding higher value caps is easy and cheap. Since the recharge time increases too,
a judicious increase would be 2X.
So Joe, if you send me the DeSlumpifier back I'll put bigger caps in it and return
it.
--------
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=410215#410215
Message 7
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| Subject: | Re: Charge battery thru Ground Power Jack |
This is a catch 22 situation. A smart battery charger will not turn on and start
charging a battery unless it first sees a battery connected. And the aircraft
ground power circuit will not turn on unless it first sees ground power connected.
Even if a battery maintainer was able to energize the aircraft ground power contactor,
that contactor might consume all of the maintainer output. The maintainer
might not have enough energy left to charge or maintain the aircraft battery.
I do not see a simple solution to this problem.
There is an error in the schematic. The wire coming out of the top of the OV module
should connect to the top of contactor coil, not the bottom of the coil.
Bad things could happen if wired as drawn.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=410222#410222
Message 8
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I've been looking for an accessory adapter that will charge an iPad (while in use).
All the adapters I've found so far either don't put out enough power to charge
the iPad or, if they can, get really hot and eventually fail.
Has anyone found a charging adapter that will work (on 14v and 28v aircraft)?
I was also thinking of building one with a panel mount USB port. But so far, every
circuit I've found has... issues. :( Does anyone have a suggestion for
such a circuit?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=410227#410227
Message 9
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| Subject: | Re: iPad charger? |
I picked up a few cigarette lighter adapters from Dealxtreme that were supposed
to be able to provide ipad current. Some couldn't, and one made my car radio
unusable whenever it was plugged in. Sorry to not be able to provide any more
help, other than to say that you may have mixed results with the seemingly easy
and cheap import options.
On Oct 10, 2013, at 13:22, "donjohnston" <don@velocity-xl.com> wrote:
>
> I've been looking for an accessory adapter that will charge an iPad (while in
use). All the adapters I've found so far either don't put out enough power to
charge the iPad or, if they can, get really hot and eventually fail.
>
> Has anyone found a charging adapter that will work (on 14v and 28v aircraft)?
>
> I was also thinking of building one with a panel mount USB port. But so far,
every circuit I've found has... issues. :( Does anyone have a suggestion for
such a circuit?
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=410227#410227
>
>
>
>
>
>
>
>
>
>
Message 10
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| Subject: | Re: De-Slumpifier, Voltage Buffer to Prevent |
Brownout
At 08:37 AM 10/10/2013, you wrote:
>
>
> > Garmin could have foreseen this and designed their
> > inboard supply to accommodate the real-world of
> > vehicular DC power systems.
>
>Actually it is a Dynon D-180, not Garmin. To be fair, the D-180 has
>an optional internal Li-ion backup battery which prevents
>brownouts. My backup battery died.
Opps . . . apologies to Dynon. Nonetheless, tailoring
input power conditioning to accommodate starter inrush
brownout isn't a big task.
Bob . . .
Message 11
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| Subject: | Re: iPad charger? |
Dan,
I mentioned this once in passing and have avoided further mention for fear of sounding
like a marketing wonk, but since you're interested...
I've been developing a product to do exactly what you need. As it's shaping up,
it should be a board about 1.25 x 2.5 inches with a rugged dual-USB receptacle
at one end and a connector for ship's power at the other. It will comfortably
charge two iPads -- or pretty much any other USB-charged device -- at once,
and will include noise filtering and automatic shutoff in the event of charging
system failure. The USB receptacle is a panel-mount unit that uses two #4-40
screws. It can be mounted in a custom cutout in the panel, or I plan to offer
sub-panels to fit standard instrument cutouts. You could of course also
fabricate your own mounting solution.
Stay tuned; I'm pushing hard to have it ready ASAP.
Eric
do not archive
On Oct 10, 2013, at 10:22 AM, "donjohnston" <don@velocity-xl.com> wrote:
>
> I've been looking for an accessory adapter that will charge an iPad (while in
use). All the adapters I've found so far either don't put out enough power to
charge the iPad or, if they can, get really hot and eventually fail.
>
> Has anyone found a charging adapter that will work (on 14v and 28v aircraft)?
>
> I was also thinking of building one with a panel mount USB port. But so far,
every circuit I've found has... issues. :( Does anyone have a suggestion for
such a circuit?
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=410227#410227
Message 12
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| Subject: | Re: iPad charger? |
I use a 12 volt cigarette plug from Radio Shack that puts out the required
amps for 2 iDevices. I haven't looked for a 28V charger.
You do have to specify that is for an iDevice to get one with the proper po
wer output.
Dennis Glaeser
Nothing in this message is intended to constitute an electronic signature u
nless a specific statement to the contrary is included in this message.
Confidentiality Note: This message is intended only for the person or entit
y to which it is addressed. It may contain confidential and/or privileged m
aterial. Any review, transmission, dissemination or other use, or taking of
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the intended recipient is prohibited and may be unlawful. If you received
this message in error, please contact the sender and delete it from your co
mputer.
Message 13
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| Subject: | Re: Charge battery thru Ground Power Jack |
Why not have a 'manual' switch to activate the contactor
for battery mainenance?
On Wed, 9 Oct 2013 09:17:05 -0700
"jonlaury" <jonlaury@impulse.net> wrote:
><jonlaury@impulse.net>
>
> One of the reasons I installed a GPJ was that I thought
>that I would be able to hook up my battery maintainer
>through it.
> But when the Schumacher XC-10 is connected, there's not
>sufficient power to light the GP indicator lamp or close
>the GPG contactor.
> How do I make this happen?
>
> Thanks,
> John
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=410145#410145
>
>
>
>
> Attachments:
>
> http://forums.matronics.com//files/z8_20td_final_191.pdf
>
>
>
>
>Un/Subscription,
>http://www.matronics.com/Navigator?AeroElectric-List
>Forums!
>Admin.
>
>
>
Message 14
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| Subject: | Re: iPad charger? |
Eric -
I would certainly like to have a couple of them for my project. Big
problem on my trip to Alaska. We had purchased 3 or 4 expensive USB
recharging receptacles and converters. By the time we got to Calgary,
every one of them had crapped out, two of them wouldn't even work on
plugging them in, although they all worked when we checked them prior to
the trip. We got a ride to a Radio Shack, and bought a couple more, and
those managed to work until we got to Anchorage. We were flying with 2
iPads for redundance, thank goodness, plus had the weather on the
Stratus ADS-B, and an iPhone for a back up panel. Sure enough, we lost
a vacuum pump about an hour out of Ft. Nelson, Canada, and the iPhone
app made it a non event, even with weather closing in. Had to make a
couple of more legs before we could find a replacement vacuum pump.
That experience has convinced me to include USB plugs plan for extra
electrical taps for whatever hand held equipment is available when I get
it completed. Plus, I just hate having all the cords running all over
the cockpit.
M. Haught
On 10/10/2013 2:09 PM, Eric Page wrote:
>
> Dan,
>
> I mentioned this once in passing and have avoided further mention for fear of
sounding like a marketing wonk, but since you're interested...
>
> I've been developing a product to do exactly what you need. As it's shaping
up, it should be a board about 1.25 x 2.5 inches with a rugged dual-USB receptacle
at one end and a connector for ship's power at the other. It will comfortably
charge two iPads -- or pretty much any other USB-charged device -- at once,
and will include noise filtering and automatic shutoff in the event of charging
system failure. The USB receptacle is a panel-mount unit that uses two
#4-40 screws. It can be mounted in a custom cutout in the panel, or I plan to
offer sub-panels to fit standard instrument cutouts. You could of course also
fabricate your own mounting solution.
>
> Stay tuned; I'm pushing hard to have it ready ASAP.
>
> Eric
>
> do not archive
>
>
> On Oct 10, 2013, at 10:22 AM, "donjohnston" <don@velocity-xl.com> wrote:
>>
>> I've been looking for an accessory adapter that will charge an iPad (while in
use). All the adapters I've found so far either don't put out enough power to
charge the iPad or, if they can, get really hot and eventually fail.
>>
>> Has anyone found a charging adapter that will work (on 14v and 28v aircraft)?
>>
>> I was also thinking of building one with a panel mount USB port. But so far,
every circuit I've found has... issues. :( Does anyone have a suggestion for
such a circuit?
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=410227#410227
>
>
Message 15
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| Subject: | Question on pwr. dist. diag. Z-19 |
Bob,
On Z-19, I note that the dual batteries are connected in parallel via a brass strap
and via grounds which both go to the PNL; one feeds a "Main Battery Bus";
the other feeds the "Engine Battery Bus"; the ECU and fuel pump are fed from
both busses via "Engine Primary" and "Engine Secondary" switches and diode bridges.
What I don't understand is why, since the dual batteries are connected, are 2 busses
necessary?...Why not just one bus being fed off either of the 2 batteries?...is
there a battery failure mode with dual batteries which would preclude
drawing current from the good battery thru the failed battery?
Fred
Message 16
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| Subject: | Re: iPad charger? |
Marvin,
Thanks for this story! That's *exactly* why I'm designing this product. The market
is flush with USB chargers of every size, brand, color and price. Sadly,
apart from a few OEM products, they seem to share one trait in common: poor
design, parts quality and manufacturing.
It's obvious that portable touch-screen devices are the way forward for many pilots,
and USB has become ubiquitous for charging them. Now we need a reliable
charger.
Eric
do not archive
On Oct 10, 2013, at 12:50 PM, "H. Marvin Haught Jr. " <handainc@madisoncounty.net>
wrote:
>
> Eric -
>
> I would certainly like to have a couple of them for my project. Big problem on
my trip to Alaska. We had purchased 3 or 4 expensive USB recharging receptacles
and converters. By the time we got to Calgary, every one of them had crapped
out, two of them wouldn't even work on plugging them in, although they all
worked when we checked them prior to the trip. We got a ride to a Radio Shack,
and bought a couple more, and those managed to work until we got to Anchorage.
We were flying with 2 iPads for redundance, thank goodness, plus had the
weather on the Stratus ADS-B, and an iPhone for a back up panel. Sure enough,
we lost a vacuum pump about an hour out of Ft. Nelson, Canada, and the iPhone
app made it a non event, even with weather closing in. Had to make a couple
of more legs before we could find a replacement vacuum pump.
>
> That experience has convinced me to include USB plugs plan for extra electrical
taps for whatever hand held equipment is available when I get it completed.
Plus, I just hate having all the cords running all over the cockpit.
>
> M. Haught
>
> On 10/10/2013 2:09 PM, Eric Page wrote:
>>
>> Dan,
>>
>> I mentioned this once in passing and have avoided further mention for fear of
sounding like a marketing wonk, but since you're interested...
>>
>> I've been developing a product to do exactly what you need. As it's shaping
up, it should be a board about 1.25 x 2.5 inches with a rugged dual-USB receptacle
at one end and a connector for ship's power at the other. It will comfortably
charge two iPads -- or pretty much any other USB-charged device -- at once,
and will include noise filtering and automatic shutoff in the event of charging
system failure. The USB receptacle is a panel-mount unit that uses two
#4-40 screws. It can be mounted in a custom cutout in the panel, or I plan to
offer sub-panels to fit standard instrument cutouts. You could of course also
fabricate your own mounting solution.
>>
>> Stay tuned; I'm pushing hard to have it ready ASAP.
>>
>> Eric
>>
>> do not archive
>>
>>
>> On Oct 10, 2013, at 10:22 AM, "donjohnston" <don@velocity-xl.com> wrote:
>>>
>>> I've been looking for an accessory adapter that will charge an iPad (while
in use). All the adapters I've found so far either don't put out enough power
to charge the iPad or, if they can, get really hot and eventually fail.
>>>
>>> Has anyone found a charging adapter that will work (on 14v and 28v aircraft)?
>>>
>>> I was also thinking of building one with a panel mount USB port. But so far,
every circuit I've found has... issues. :( Does anyone have a suggestion
for such a circuit?
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=410227#410227
Message 17
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| Subject: | Re: iPad charger? |
Hi Eric,
Is it a "no-noise" circuit or switched w/minimal noise ?
BTW I've been very pleased with the 24V to 19 V (for Lenovo tablet) no noise charger/PS
you made for me.
Rumen
---- Eric Page <edpav8r@yahoo.com> wrote:
============
Dan,
I mentioned this once in passing and have avoided further mention for fear of sounding
like a marketing wonk, but since you're interested...
I've been developing a product to do exactly what you need. As it's shaping up,
it should be a board about 1.25 x 2.5 inches with a rugged dual-USB receptacle
at one end and a connector for ship's power at the other. It will comfortably
charge two iPads -- or pretty much any other USB-charged device -- at once,
and will include noise filtering and automatic shutoff in the event of charging
system failure. The USB receptacle is a panel-mount unit that uses two #4-40
screws. It can be mounted in a custom cutout in the panel, or I plan to offer
sub-panels to fit standard instrument cutouts. You could of course also
fabricate your own mounting solution.
Stay tuned; I'm pushing hard to have it ready ASAP.
Eric
do not archive
On Oct 10, 2013, at 10:22 AM, "donjohnston" <don@velocity-xl.com> wrote:
>
> I've been looking for an accessory adapter that will charge an iPad (while in
use). All the adapters I've found so far either don't put out enough power to
charge the iPad or, if they can, get really hot and eventually fail.
>
> Has anyone found a charging adapter that will work (on 14v and 28v aircraft)?
>
> I was also thinking of building one with a panel mount USB port. But so far,
every circuit I've found has... issues. :( Does anyone have a suggestion for
such a circuit?
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=410227#410227
Message 18
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| Subject: | Re: iPad charger? |
And you need to design so that the unit can be hard wired into the
panel, not just portable.
M. Haught
On Oct 10, 2013, at 3:15 PM, Eric Page wrote:
> flush with USB chargers of every size, brand, color and price. Sadly,
apart from a few OEM products, they seem to share one trait in common:
poor design, parts quality and manufacturing.
Message 19
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| Subject: | Re: iPad charger? |
Ooops! Sorry, Eric, I was to fast, obviously not paying attention as to who the
originator was -
I was referring to Eric Jones (Perihelion Design) in my earlier post.
Rumen
P.S. You are right, I've been burned twice with these "nice, professionally looking"
5 V devices on ebay.
Now, I am testing this one: tinyurl.com/l7h235y
Presume it's a switcher, but no noticeable noise; hope it doesn't burn out (and
my tablet).
Would appreciate feedback from others, if anyone else is using it.
Do not archive
---- Eric Page <edpav8r@yahoo.com> wrote:
============
Marvin,
Thanks for this story! That's *exactly* why I'm designing this product. The market
is flush with USB chargers of every size, brand, color and price. Sadly,
apart from a few OEM products, they seem to share one trait in common: poor
design, parts quality and manufacturing.
It's obvious that portable touch-screen devices are the way forward for many pilots,
and USB has become ubiquitous for charging them. Now we need a reliable
charger.
Eric
do not archive
On Oct 10, 2013, at 12:50 PM, "H. Marvin Haught Jr. " <handainc@madisoncounty.net>
wrote:
>
> Eric -
>
> I would certainly like to have a couple of them for my project. Big problem on
my trip to Alaska. We had purchased 3 or 4 expensive USB recharging receptacles
and converters. By the time we got to Calgary, every one of them had crapped
out, two of them wouldn't even work on plugging them in, although they all
worked when we checked them prior to the trip. We got a ride to a Radio Shack,
and bought a couple more, and those managed to work until we got to Anchorage.
We were flying with 2 iPads for redundance, thank goodness, plus had the
weather on the Stratus ADS-B, and an iPhone for a back up panel. Sure enough,
we lost a vacuum pump about an hour out of Ft. Nelson, Canada, and the iPhone
app made it a non event, even with weather closing in. Had to make a couple
of more legs before we could find a replacement vacuum pump.
>
> That experience has convinced me to include USB plugs plan for extra electrical
taps for whatever hand held equipment is available when I get it completed.
Plus, I just hate having all the cords running all over the cockpit.
>
> M. Haught
>
> On 10/10/2013 2:09 PM, Eric Page wrote:
>>
>> Dan,
>>
>> I mentioned this once in passing and have avoided further mention for fear of
sounding like a marketing wonk, but since you're interested...
>>
>> I've been developing a product to do exactly what you need. As it's shaping
up, it should be a board about 1.25 x 2.5 inches with a rugged dual-USB receptacle
at one end and a connector for ship's power at the other. It will comfortably
charge two iPads -- or pretty much any other USB-charged device -- at once,
and will include noise filtering and automatic shutoff in the event of charging
system failure. The USB receptacle is a panel-mount unit that uses two
#4-40 screws. It can be mounted in a custom cutout in the panel, or I plan to
offer sub-panels to fit standard instrument cutouts. You could of course also
fabricate your own mounting solution.
>>
>> Stay tuned; I'm pushing hard to have it ready ASAP.
>>
>> Eric
>>
>> do not archive
>>
>>
>> On Oct 10, 2013, at 10:22 AM, "donjohnston" <don@velocity-xl.com> wrote:
>>>
>>> I've been looking for an accessory adapter that will charge an iPad (while
in use). All the adapters I've found so far either don't put out enough power
to charge the iPad or, if they can, get really hot and eventually fail.
>>>
>>> Has anyone found a charging adapter that will work (on 14v and 28v aircraft)?
>>>
>>> I was also thinking of building one with a panel mount USB port. But so far,
every circuit I've found has... issues. :( Does anyone have a suggestion
for such a circuit?
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=410227#410227
Message 20
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|
| Subject: | Re: iPad charger? |
I bought one from Best Buy about 3 years ago - I use it in my truck for my
iPhone most of the time; but it has had no problem on long trips keeping
the iPad going. It even has a USB adapter on the top of the cigarette
plug that I have used simultaneously to charge another device. Works like
a charm.
Scott R. Shook
On 10/10/13 10:22 , "donjohnston" <don@velocity-xl.com> wrote:
><don@velocity-xl.com>
>
>I've been looking for an accessory adapter that will charge an iPad
>(while in use). All the adapters I've found so far either don't put out
>enough power to charge the iPad or, if they can, get really hot and
>eventually fail.
>
>Has anyone found a charging adapter that will work (on 14v and 28v
>aircraft)?
>
>I was also thinking of building one with a panel mount USB port. But so
>far, every circuit I've found has... issues. :( Does anyone have a
>suggestion for such a circuit?
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=410227#410227
>
>
Message 21
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|
| Subject: | Re: iPad charger? |
You got lucky! I've got one that I use in my truck too that has been a good one.
But the ones we took to Alaska were junk.....and 3 of them were expensive,
which we bought under the premise that "you get what you pay for". Not so!
We took all of them apart in the motel to see if we could fix them....just junk.
I've got one from my old Noki smart phone that is really good, and two Apple
units that are in constant use.
M. Haught
On Oct 10, 2013, at 3:48 PM, Scott R. Shook wrote:
>
> I bought one from Best Buy about 3 years ago - I use it in my truck for my
> iPhone most of the time; but it has had no problem on long trips keeping
> the iPad going. It even has a USB adapter on the top of the cigarette
> plug that I have used simultaneously to charge another device. Works like
> a charm.
>
> Scott R. Shook
>
>
>
>
>
> On 10/10/13 10:22 , "donjohnston" <don@velocity-xl.com> wrote:
>
>> <don@velocity-xl.com>
>>
>> I've been looking for an accessory adapter that will charge an iPad
>> (while in use). All the adapters I've found so far either don't put out
>> enough power to charge the iPad or, if they can, get really hot and
>> eventually fail.
>>
>> Has anyone found a charging adapter that will work (on 14v and 28v
>> aircraft)?
>>
>> I was also thinking of building one with a panel mount USB port. But so
>> far, every circuit I've found has... issues. :( Does anyone have a
>> suggestion for such a circuit?
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=410227#410227
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
>
Message 22
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| Subject: | Re: iPad charger? |
That looks exactly like the most expensive one we had on the trip, but ours did
not have the big lable. Lasted only the first day in the airplane. I think
we paid $30 or $40 for it in an electronic shop at home.
M. Haught
On Oct 10, 2013, at 3:49 PM, <rd2@dejazzd.com> wrote:
>
> Ooops! Sorry, Eric, I was to fast, obviously not paying attention as to who the
originator was -
> I was referring to Eric Jones (Perihelion Design) in my earlier post.
> Rumen
>
> P.S. You are right, I've been burned twice with these "nice, professionally looking"
5 V devices on ebay.
> Now, I am testing this one: tinyurl.com/l7h235y
> Presume it's a switcher, but no noticeable noise; hope it doesn't burn out (and
my tablet).
> Would appreciate feedback from others, if anyone else is using it.
>
> Do not archive
>
> ---- Eric Page <edpav8r@yahoo.com> wrote:
>
> ============
>
> Marvin,
>
> Thanks for this story! That's *exactly* why I'm designing this product. The
market is flush with USB chargers of every size, brand, color and price. Sadly,
apart from a few OEM products, they seem to share one trait in common: poor
design, parts quality and manufacturing.
>
> It's obvious that portable touch-screen devices are the way forward for many
pilots, and USB has become ubiquitous for charging them. Now we need a reliable
charger.
>
> Eric
>
> do not archive
>
>
> On Oct 10, 2013, at 12:50 PM, "H. Marvin Haught Jr. " <handainc@madisoncounty.net>
wrote:
>>
>> Eric -
>>
>> I would certainly like to have a couple of them for my project. Big problem
on my trip to Alaska. We had purchased 3 or 4 expensive USB recharging receptacles
and converters. By the time we got to Calgary, every one of them had crapped
out, two of them wouldn't even work on plugging them in, although they all
worked when we checked them prior to the trip. We got a ride to a Radio Shack,
and bought a couple more, and those managed to work until we got to Anchorage.
We were flying with 2 iPads for redundance, thank goodness, plus had the
weather on the Stratus ADS-B, and an iPhone for a back up panel. Sure enough,
we lost a vacuum pump about an hour out of Ft. Nelson, Canada, and the iPhone
app made it a non event, even with weather closing in. Had to make a couple
of more legs before we could find a replacement vacuum pump.
>>
>> That experience has convinced me to include USB plugs plan for extra electrical
taps for whatever hand held equipment is available when I get it completed.
Plus, I just hate having all the cords running all over the cockpit.
>>
>> M. Haught
>>
>> On 10/10/2013 2:09 PM, Eric Page wrote:
>>>
>>> Dan,
>>>
>>> I mentioned this once in passing and have avoided further mention for fear
of sounding like a marketing wonk, but since you're interested...
>>>
>>> I've been developing a product to do exactly what you need. As it's shaping
up, it should be a board about 1.25 x 2.5 inches with a rugged dual-USB receptacle
at one end and a connector for ship's power at the other. It will comfortably
charge two iPads -- or pretty much any other USB-charged device -- at
once, and will include noise filtering and automatic shutoff in the event of charging
system failure. The USB receptacle is a panel-mount unit that uses two
#4-40 screws. It can be mounted in a custom cutout in the panel, or I plan
to offer sub-panels to fit standard instrument cutouts. You could of course also
fabricate your own mounting solution.
>>>
>>> Stay tuned; I'm pushing hard to have it ready ASAP.
>>>
>>> Eric
>>>
>>> do not archive
>>>
>>>
>>> On Oct 10, 2013, at 10:22 AM, "donjohnston" <don@velocity-xl.com> wrote:
>>>>
>>>> I've been looking for an accessory adapter that will charge an iPad (while
in use). All the adapters I've found so far either don't put out enough power
to charge the iPad or, if they can, get really hot and eventually fail.
>>>>
>>>> Has anyone found a charging adapter that will work (on 14v and 28v aircraft)?
>>>>
>>>> I was also thinking of building one with a panel mount USB port. But so far,
every circuit I've found has... issues. :( Does anyone have a suggestion
for such a circuit?
>>>>
>>>>
>>>> Read this topic online here:
>>>>
>>>> http://forums.matronics.com/viewtopic.php?p=410227#410227
>
>
>
>
>
>
>
>
>
>
Message 23
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|
| Subject: | Re: iPad charger? |
What voltage did you use them/it on?
I might be wrong, but it seems that most of the products advertised for 12-24 V
can't really handle well the 24-28V bus. I had one toasted the instant it was
plugged in, free running, no load.
R
do not archive
---- "H. Marvin Haught" <handainc@madisoncounty.net> wrote:
============
That looks exactly like the most expensive one we had on the trip, but ours did
not have the big lable. Lasted only the first day in the airplane. I think
we paid $30 or $40 for it in an electronic shop at home.
M. Haught
On Oct 10, 2013, at 3:49 PM, <rd2@dejazzd.com> wrote:
>
> Ooops! Sorry, Eric, I was to fast, obviously not paying attention as to who the
originator was -
> I was referring to Eric Jones (Perihelion Design) in my earlier post.
> Rumen
>
> P.S. You are right, I've been burned twice with these "nice, professionally looking"
5 V devices on ebay.
> Now, I am testing this one: tinyurl.com/l7h235y
> Presume it's a switcher, but no noticeable noise; hope it doesn't burn out (and
my tablet).
> Would appreciate feedback from others, if anyone else is using it.
>
> Do not archive
>
> ---- Eric Page <edpav8r@yahoo.com> wrote:
>
> ============
>
> Marvin,
>
> Thanks for this story! That's *exactly* why I'm designing this product. The
market is flush with USB chargers of every size, brand, color and price. Sadly,
apart from a few OEM products, they seem to share one trait in common: poor
design, parts quality and manufacturing.
>
> It's obvious that portable touch-screen devices are the way forward for many
pilots, and USB has become ubiquitous for charging them. Now we need a reliable
charger.
>
> Eric
>
> do not archive
>
>
> On Oct 10, 2013, at 12:50 PM, "H. Marvin Haught Jr. " <handainc@madisoncounty.net>
wrote:
>>
>> Eric -
>>
>> I would certainly like to have a couple of them for my project. Big problem
on my trip to Alaska. We had purchased 3 or 4 expensive USB recharging receptacles
and converters. By the time we got to Calgary, every one of them had crapped
out, two of them wouldn't even work on plugging them in, although they all
worked when we checked them prior to the trip. We got a ride to a Radio Shack,
and bought a couple more, and those managed to work until we got to Anchorage.
We were flying with 2 iPads for redundance, thank goodness, plus had the
weather on the Stratus ADS-B, and an iPhone for a back up panel. Sure enough,
we lost a vacuum pump about an hour out of Ft. Nelson, Canada, and the iPhone
app made it a non event, even with weather closing in. Had to make a couple
of more legs before we could find a replacement vacuum pump.
>>
>> That experience has convinced me to include USB plugs plan for extra electrical
taps for whatever hand held equipment is available when I get it completed.
Plus, I just hate having all the cords running all over the cockpit.
>>
>> M. Haught
>>
>> On 10/10/2013 2:09 PM, Eric Page wrote:
>>>
>>> Dan,
>>>
>>> I mentioned this once in passing and have avoided further mention for fear
of sounding like a marketing wonk, but since you're interested...
>>>
>>> I've been developing a product to do exactly what you need. As it's shaping
up, it should be a board about 1.25 x 2.5 inches with a rugged dual-USB receptacle
at one end and a connector for ship's power at the other. It will comfortably
charge two iPads -- or pretty much any other USB-charged device -- at
once, and will include noise filtering and automatic shutoff in the event of charging
system failure. The USB receptacle is a panel-mount unit that uses two
#4-40 screws. It can be mounted in a custom cutout in the panel, or I plan
to offer sub-panels to fit standard instrument cutouts. You could of course also
fabricate your own mounting solution.
>>>
>>> Stay tuned; I'm pushing hard to have it ready ASAP.
>>>
>>> Eric
>>>
>>> do not archive
>>>
>>>
>>> On Oct 10, 2013, at 10:22 AM, "donjohnston" <don@velocity-xl.com> wrote:
>>>>
>>>> I've been looking for an accessory adapter that will charge an iPad (while
in use). All the adapters I've found so far either don't put out enough power
to charge the iPad or, if they can, get really hot and eventually fail.
>>>>
>>>> Has anyone found a charging adapter that will work (on 14v and 28v aircraft)?
>>>>
>>>> I was also thinking of building one with a panel mount USB port. But so far,
every circuit I've found has... issues. :( Does anyone have a suggestion
for such a circuit?
>>>>
>>>>
>>>> Read this topic online here:
>>>>
>>>> http://forums.matronics.com/viewtopic.php?p=410227#410227
>
>
>
>
>
>
>
>
>
>
Message 24
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|
| Subject: | Re: iPad charger? |
Hi Eric,
I have been thinking about how to do this too. The panel mount would be
ideal. When you get it ready to test or sell, sign me up.
Regards,
Michael Wynn
RV 8 Finishing
San Ramon, CA
In a message dated 10/10/2013 1:17:21 P.M. Pacific Daylight Time,
edpav8r@yahoo.com writes:
--> AeroElectric-List message posted by: Eric Page <edpav8r@yahoo.com>
Marvin,
Thanks for this story! That's *exactly* why I'm designing this product.
The market is flush with USB chargers of every size, brand, color and
price. Sadly, apart from a few OEM products, they seem to share one trait in
common: poor design, parts quality and manufacturing.
It's obvious that portable touch-screen devices are the way forward for
many pilots, and USB has become ubiquitous for charging them. Now we need a
reliable charger.
Eric
do not archive
On Oct 10, 2013, at 12:50 PM, "H. Marvin Haught Jr. "
<handainc@madisoncounty.net> wrote:
<handainc@madisoncounty.net>
>
> Eric -
>
> I would certainly like to have a couple of them for my project. Big
problem on my trip to Alaska. We had purchased 3 or 4 expensive USB recharging
receptacles and converters. By the time we got to Calgary, every one of
them had crapped out, two of them wouldn't even work on plugging them in,
although they all worked when we checked them prior to the trip. We got a
ride to a Radio Shack, and bought a couple more, and those managed to work
until we got to Anchorage. We were flying with 2 iPads for redundance, thank
goodness, plus had the weather on the Stratus ADS-B, and an iPhone for a
back up panel. Sure enough, we lost a vacuum pump about an hour out of Ft.
Nelson, Canada, and the iPhone app made it a non event, even with weather
closing in. Had to make a couple of more legs before we could find a
replacement vacuum pump.
>
> That experience has convinced me to include USB plugs plan for extra
electrical taps for whatever hand held equipment is available when I get it
completed. Plus, I just hate having all the cords running all over the
cockpit.
>
> M. Haught
>
> On 10/10/2013 2:09 PM, Eric Page wrote:
>>
>> Dan,
>>
>> I mentioned this once in passing and have avoided further mention for
fear of sounding like a marketing wonk, but since you're interested...
>>
>> I've been developing a product to do exactly what you need. As it's
shaping up, it should be a board about 1.25 x 2.5 inches with a rugged
dual-USB receptacle at one end and a connector for ship's power at the other.
It
will comfortably charge two iPads -- or pretty much any other USB-charged
device -- at once, and will include noise filtering and automatic shutoff
in the event of charging system failure. The USB receptacle is a
panel-mount unit that uses two #4-40 screws. It can be mounted in a custom cutout
in
the panel, or I plan to offer sub-panels to fit standard instrument
cutouts. You could of course also fabricate your own mounting solution.
>>
>> Stay tuned; I'm pushing hard to have it ready ASAP.
>>
>> Eric
>>
>> do not archive
>>
>>
>> On Oct 10, 2013, at 10:22 AM, "donjohnston" <don@velocity-xl.com>
wrote:
<don@velocity-xl.com>
>>>
>>> I've been looking for an accessory adapter that will charge an iPad
(while in use). All the adapters I've found so far either don't put out
enough power to charge the iPad or, if they can, get really hot and eventually
fail.
>>>
>>> Has anyone found a charging adapter that will work (on 14v and 28v
aircraft)?
>>>
>>> I was also thinking of building one with a panel mount USB port. But
so far, every circuit I've found has... issues. :( Does anyone have a
suggestion for such a circuit?
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=410227#410227
Message 25
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|
| Subject: | Re: iPad charger? |
Eric,
Please let me know when you have this product ready!
Thanks, earl
---------- Original Message ----------
From: Eric Page <edpav8r@yahoo.com>
Subject: Re: AeroElectric-List: iPad charger?
Dan,
I mentioned this once in passing and have avoided further mention for fear of sounding
like a marketing wonk, but since you're interested...
I've been developing a product to do exactly what you need. As it's shaping up,
it should be a board about 1.25 x 2.5 inches with a rugged dual-USB receptacle
at one end and a connector for ship's power at the other. It will comfortably
charge two iPads -- or pretty much any other USB-charged device -- at once,
and will include noise filtering and automatic shutoff in the event of charging
system failure. The USB receptacle is a panel-mount unit that uses two #4-40
screws. It can be mounted in a custom cutout in the panel, or I plan to offer
sub-panels to fit standard instrument cutouts. You could of course also
fabricate your own mounting solution.
Stay tuned; I'm pushing hard to have it ready ASAP.
Eric
do not archive
On Oct 10, 2013, at 10:22 AM, "donjohnston" <don@velocity-xl.com> wrote:
>
> I've been looking for an accessory adapter that will charge an iPad (while in
use). All the adapters I've found so far either don't put out enough power to
charge the iPad or, if they can, get really hot and eventually fail.
>
> Has anyone found a charging adapter that will work (on 14v and 28v aircraft)?
>
> I was also thinking of building one with a panel mount USB port. But so far,
every circuit I've found has... issues. :( Does anyone have a suggestion for
such a circuit?
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=410227#410227
Message 26
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|
| Subject: | Re: iPad charger? |
12 Volt - two of the cheaper ones did the same thing, even though we had tested
them at home. Alternator at the time was putting out 13.8 volts according to
the volt meter.
M. Haught
On Oct 10, 2013, at 5:09 PM, <rd2@dejazzd.com> wrote:
>
> What voltage did you use them/it on?
> I might be wrong, but it seems that most of the products advertised for 12-24
V can't really handle well the 24-28V bus. I had one toasted the instant it was
plugged in, free running, no load.
> R
>
> do not archive
>
> ---- "H. Marvin Haught" <handainc@madisoncounty.net> wrote:
>
> ============
>
> That looks exactly like the most expensive one we had on the trip, but ours did
not have the big lable. Lasted only the first day in the airplane. I think
we paid $30 or $40 for it in an electronic shop at home.
>
> M. Haught
> On Oct 10, 2013, at 3:49 PM, <rd2@dejazzd.com> wrote:
>
>>
>> Ooops! Sorry, Eric, I was to fast, obviously not paying attention as to who
the originator was -
>> I was referring to Eric Jones (Perihelion Design) in my earlier post.
>> Rumen
>>
>> P.S. You are right, I've been burned twice with these "nice, professionally
looking" 5 V devices on ebay.
>> Now, I am testing this one: tinyurl.com/l7h235y
>> Presume it's a switcher, but no noticeable noise; hope it doesn't burn out (and
my tablet).
>> Would appreciate feedback from others, if anyone else is using it.
>>
>> Do not archive
>>
>> ---- Eric Page <edpav8r@yahoo.com> wrote:
>>
>> ============
>>
>> Marvin,
>>
>> Thanks for this story! That's *exactly* why I'm designing this product. The
market is flush with USB chargers of every size, brand, color and price. Sadly,
apart from a few OEM products, they seem to share one trait in common: poor
design, parts quality and manufacturing.
>>
>> It's obvious that portable touch-screen devices are the way forward for many
pilots, and USB has become ubiquitous for charging them. Now we need a reliable
charger.
>>
>> Eric
>>
>> do not archive
>>
>>
>> On Oct 10, 2013, at 12:50 PM, "H. Marvin Haught Jr. " <handainc@madisoncounty.net>
wrote:
>>>
>>> Eric -
>>>
>>> I would certainly like to have a couple of them for my project. Big problem
on my trip to Alaska. We had purchased 3 or 4 expensive USB recharging receptacles
and converters. By the time we got to Calgary, every one of them had crapped
out, two of them wouldn't even work on plugging them in, although they
all worked when we checked them prior to the trip. We got a ride to a Radio Shack,
and bought a couple more, and those managed to work until we got to Anchorage.
We were flying with 2 iPads for redundance, thank goodness, plus had the
weather on the Stratus ADS-B, and an iPhone for a back up panel. Sure enough,
we lost a vacuum pump about an hour out of Ft. Nelson, Canada, and the iPhone
app made it a non event, even with weather closing in. Had to make a couple
of more legs before we could find a replacement vacuum pump.
>>>
>>> That experience has convinced me to include USB plugs plan for extra electrical
taps for whatever hand held equipment is available when I get it completed.
Plus, I just hate having all the cords running all over the cockpit.
>>>
>>> M. Haught
>>>
>>> On 10/10/2013 2:09 PM, Eric Page wrote:
>>>>
>>>> Dan,
>>>>
>>>> I mentioned this once in passing and have avoided further mention for fear
of sounding like a marketing wonk, but since you're interested...
>>>>
>>>> I've been developing a product to do exactly what you need. As it's shaping
up, it should be a board about 1.25 x 2.5 inches with a rugged dual-USB receptacle
at one end and a connector for ship's power at the other. It will comfortably
charge two iPads -- or pretty much any other USB-charged device -- at
once, and will include noise filtering and automatic shutoff in the event of
charging system failure. The USB receptacle is a panel-mount unit that uses two
#4-40 screws. It can be mounted in a custom cutout in the panel, or I plan
to offer sub-panels to fit standard instrument cutouts. You could of course
also fabricate your own mounting solution.
>>>>
>>>> Stay tuned; I'm pushing hard to have it ready ASAP.
>>>>
>>>> Eric
>>>>
>>>> do not archive
>>>>
>>>>
>>>> On Oct 10, 2013, at 10:22 AM, "donjohnston" <don@velocity-xl.com> wrote:
>>>>>
>>>>> I've been looking for an accessory adapter that will charge an iPad (while
in use). All the adapters I've found so far either don't put out enough power
to charge the iPad or, if they can, get really hot and eventually fail.
>>>>>
>>>>> Has anyone found a charging adapter that will work (on 14v and 28v aircraft)?
>>>>>
>>>>> I was also thinking of building one with a panel mount USB port. But so far,
every circuit I've found has... issues. :( Does anyone have a suggestion
for such a circuit?
>>>>>
>>>>>
>>>>> Read this topic online here:
>>>>>
>>>>> http://forums.matronics.com/viewtopic.php?p=410227#410227
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
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Message 27
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| Subject: | Re: iPad charger? |
Rumen: No worries. I think I've seen three Erics on the List! I haven't seen
the charger you've got, but I'm sure it's a switcher. They all are. Getting
enough current at 5V to rapid-charge an iPad through a linear regulator fed with
14V would make an 18-watt heater!
Marvin: Panel mounted and hard wired is exactly my plan. Nice, neat installation
and zero hassle during use.
Michael and Earl: Thanks for your interest; I'll add you to my contact list.
Cheers,
Eric
do not archive
Message 28
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Also interested.
Bill Greenley
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Eric Page
Sent: Thursday, October 10, 2013 8:48 PM
Subject: Re: AeroElectric-List: iPad charger?
Rumen: No worries. I think I've seen three Erics on the List! I haven't
seen the charger you've got, but I'm sure it's a switcher. They all are.
Getting enough current at 5V to rapid-charge an iPad through a linear
regulator fed with 14V would make an 18-watt heater!
Marvin: Panel mounted and hard wired is exactly my plan. Nice, neat
installation and zero hassle during use.
Michael and Earl: Thanks for your interest; I'll add you to my contact
list.
Cheers,
Eric
do not archive
Message 29
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| Subject: | Withdraw Question on pwr. dist. diag. Z-19 |
Bob...question withdrawn, as I more carefully review the diagram...Fred
Bob,
On Z-19, I note that the dual batteries are connected in parallel via a brass strap
and via grounds which both go to the PNL; one feeds a "Main Battery Bus";
the other feeds the "Engine Battery Bus"; the ECU and fuel pump are fed from
both busses via "Engine Primary" and "Engine Secondary" switches and diode bridges.
What I don't understand is why, since the dual batteries are connected, are 2 busses
necessary?...Why not just one bus being fed off either of the 2 batteries?...is
there a battery failure mode with dual batteries which would preclude
drawing current from the good battery thru the failed battery?
Fred
Message 30
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| Subject: | Re: Withdraw Question on pwr. dist. diag. Z-19 |
At 09:32 PM 10/10/2013, you wrote:
>
>Bob...question withdrawn, as I more carefully review the diagram...Fred
Very good sir.
Bob . . .
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