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Laptop supply for your car/airplane

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nuckolls.bob(at)aeroelect
Guest

Posted: Sat Oct 16, 2010 4:54 pm Post subject: Laptop supply for your car/airplane

I just ran across this item on Ebay:



  http://tinyurl.com/2cyx7c7 



 With an input from your 14v bus, it can be set up

 to provide the typical 18-20 volts needed by many

 laptops.

         



 

   Bob . . .    [quote][b]

sportav8r(at)gmail.com
Guest

Posted: Sat Oct 16, 2010 5:24 pm Post subject: Laptop supply for your car/airplane

Sounds like it may be useful for powering portable HF gear (the common 10 watt rice boxes) from Li-poly or Li-metal cells that don't readily supply 12.6-13.8v ganged as batteries.  85% efficiency is not stellar, but might still be better efficiency than a dropping regulator on a 16v pack... 



-Bill Boyd



On Sat, Oct 16, 2010 at 8:51 PM, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

 [quote]  I just ran across this item on Ebay:



  http://tinyurl.com/2cyx7c7 



 With an input from your 14v bus, it can be set up

 to provide the typical 18-20 volts needed by many

 laptops.

         



 

   Bob . . .     	  Quote: 	
		  



ist" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	




[b]

jdubner(at)yahoo.com
Guest

Posted: Sat Oct 16, 2010 6:52 pm Post subject: Laptop supply for your car/airplane

Sounds like it might even /be/ HF gear 



That single-sided PCB with minimal filtering (judging only by the 

pictures -- see http://tinyurl.com/2943gjk) probably radiates switching 

transient energy through VHF and beyond.



Of course if used with a laptop PC as per Bob's original suggestion, 

this point may be mute because the laptop has it's own issues.  But I'd 

be leery about using it around receiving equipment in an aircraft (or 

elsewhere).



My $.02 -- YMMV.



--

Joe

Independence, OR

http://www.mail2600.com/position

http://www.mail2600.com/cgi-bin/webcam.cgi

Bill Boyd wrote:

 	  Quote: 	
		   Sounds like it may be useful for powering portable HF gear (the common 10

 watt rice boxes) from Li-poly or Li-metal cells that don't readily supply

 12.6-13.8v ganged as batteries.  85% efficiency is not stellar, but might

 still be better efficiency than a dropping regulator on a 16v pack...

 

 -Bill Boyd

 

 On Sat, Oct 16, 2010 at 8:51 PM, Robert L. Nuckolls, III <

 nuckolls.bob(at)aeroelectric.com> wrote:

 

>  I just ran across this item on Ebay:

>

> * http://tinyurl.com/2cyx7c7*

>

> With an input from your 14v bus, it can be set up

> to provide the typical 18-20 volts needed by many

> laptops.

>    Bob . . .

>

> *

>

> *

sportav8r(at)gmail.com
Guest

Posted: Sat Oct 16, 2010 7:25 pm Post subject: Laptop supply for your car/airplane

Looks to be in a metal enclosure, though.



On Sat, Oct 16, 2010 at 10:49 PM, Joe Dubner <jdubner(at)yahoo.com (jdubner(at)yahoo.com)> wrote:

[quote] --> AeroElectric-List message posted by: Joe Dubner <jdubner(at)yahoo.com (jdubner(at)yahoo.com)>

 

 Sounds like it might even /be/ HF gear 

 

 That single-sided PCB with minimal filtering (judging only by the pictures -- see http://tinyurl.com/2943gjk) probably radiates switching transient energy through VHF and beyond.

  

 Of course if used with a laptop PC as per Bob's original suggestion, this point may be mute because the laptop has it's own issues.  But I'd be leery about using it around receiving equipment in an aircraft (or elsewhere).

  

 My $.02 -- YMMV.

 

 --

 Joe

 Independence, OR

 http://www.mail2600.com/position

 http://www.mail2600.com/cgi-bin/webcam.cgi



 

 

 Bill Boyd wrote:

  	  Quote: 	
		   Sounds like it may be useful for powering portable HF gear (the common 10

 watt rice boxes) from Li-poly or Li-metal cells that don't readily supply

 12.6-13.8v ganged as batteries.  85% efficiency is not stellar, but might

 still be better efficiency than a dropping regulator on a 16v pack...

 

 -Bill Boyd

 

 On Sat, Oct 16, 2010 at 8:51 PM, Robert L. Nuckolls, III <

 nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

 

  	  Quote: 	
		    I just ran across this item on Ebay:

 

 * [url=http://tinyurl.com/2cyx7c7*]http://tinyurl.com/2cyx7c7*[/url]

 

 With an input from your 14v bus, it can be set up

 to provide the typical 18-20 volts needed by many

 laptops.

 

 

    Bob . . .

 

 *

 

 *

 

 

 	
 

 	
 

 ===========

 -List" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

 ===========

 http://forums.matronics.com

 ===========

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

 ===========

 

 

 

 



[b]

user9253

Joined: 28 Mar 2008
Posts: 1927
Location: Riley TWP Michigan

Posted: Sun Oct 17, 2010 5:12 am Post subject: Re: Laptop supply for your car/airplane

Thanks for that link Bob.  Now what we need is a source for the DC plug to fit into the laptop.  Right now I use a 12vdc to 120vac inverter along with the laptop power brick.  The disadvantage of that is having to carry around two inefficient boxes instead of one.

Joe

_________________
Joe Gores

Eric M. Jones

Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts

Posted: Sun Oct 17, 2010 5:17 am Post subject: Re: Laptop supply for your car/airplane

Remember that anything using a hard drive depends on a little cushion of air between the read-write head and the disk. Using a HD above 10,000 feet cabin pressure is risky.



Apple, Maxtor and Seagate state 10,000 feet as the maximum operating altitude. Don't forget those IPods.

_________________
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net

email(at)jaredyates.com
Guest

Posted: Sun Oct 17, 2010 5:47 am Post subject: Laptop supply for your car/airplane

Fortunately many of the ipods have gone to flash memory I do believe. This is also the case for some of the smaller laptops. 



On Oct 17, 2010, at 9:17, "Eric M. Jones" <emjones(at)charter.net> wrote:



 	  Quote: 	
		   

 

 Remember that anything using a hard drive depends on a little cushion of air between the read-write head and the disk. Using a HD above 10,000 feet cabin pressure is risky.

 

 Apple, Maxtor and Seagate state 10,000 feet as the maximum operating altitude. Don't forget those IPods.

 

 --------

 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=316027#316027

email(at)jaredyates.com
Guest

Posted: Sun Oct 17, 2010 5:53 am Post subject: Laptop supply for your car/airplane

I use an Igo power adapter that replaces the oem notebook supply. It can work off of regular ac, sae 12v jack, and even tha special plug on some of the airliners. It also can power two other devices (cell phones etc) from the same one input. The tips are interchangeable, so you can use the same supply for multiple computer types, one at a time of course. I travel extensively and have used the Igo in all sorts of interesting situations, and the whole package isn't much larger than my OEM adapter was in the first place. 



On Oct 17, 2010, at 9:12, "user9253" <fran4sew(at)banyanol.com> wrote:



 	  Quote: 	
		   

 

 Thanks for that link Bob.  Now what we need is a source for the DC plug to fit into the laptop.  Right now I use a 12vdc to 120vac inverter along with the laptop power brick.  The disadvantage of that is having to carry around two inefficient boxes instead of one.

 Joe

 

 --------

 Joe Gores

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=316026#316026

N20DG

Joined: 02 Jan 2008
Posts: 61
Location: lancaster, texas

Posted: Sun Oct 17, 2010 6:14 am Post subject: Laptop supply for your car/airplane

Try E-Bay there are some power supply's that have universal connection and  the price is right for scavenging whatever you need

 Try this link to see one. I use this one with my laptop in the car

 http://cgi.ebay.com/UNIVERSAL-Power-Supply-AC-DC-Adapter-ACER-HP-Laptop-/160350558034?pt=Laptop_Adapters_Chargers&hash=item2555a35752

  

 Looks like you might have to copy&paste it

 Dick

  

  

  In a message dated 10/17/2010 8:18:01 A.M. Central Daylight Time,  fran4sew(at)banyanol.com writes:

  	  Quote: 	
		  -->    AeroElectric-List message posted by: "user9253"    <fran4sew(at)banyanol.com>



Thanks for that link Bob.  Now what    we need is a source for the DC plug to fit into the laptop.  Right now I    use a 12vdc to 120vac inverter along with the laptop power brick.  The    disadvantage of that is having to carry around two inefficient boxes instead    of one.

Joe



--------

Joe Gores





Read this topic    online    here:



http://forums.matronics.com/viewtopic.php?p=316026#316026===============================================

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  [quote][b]

nuckolls.bob(at)aeroelect
Guest

Posted: Sun Oct 17, 2010 7:30 am Post subject: Laptop supply for your car/airplane

At 10:22 PM 10/16/2010, you wrote:

  	  Quote: 	
		  Looks to be in a metal enclosure, though.



 On Sat, Oct 16, 2010 at 10:49 PM, Joe Dubner <jdubner(at)yahoo.com (jdubner(at)yahoo.com)> wrote:

   --> AeroElectric-List message posted by: Joe Dubner <jdubner(at)yahoo.com (jdubner(at)yahoo.com) > 	
 



 That single-sided PCB with minimal filtering (judging only by the pictures -- see http://tinyurl.com/2943gjk) probably radiates switching transient energy through VHF and beyond.



     Hmmm . . . I thought I tiny-url'd the link to the

     top address for the Ebay offering. Here's the

     corrected link plus a couple others . . .



  http://tinyurl.com/2wftqo9 



  http://tinyurl.com/2w22toe 



  http://tinyurl.com/33grzmg 



     Some of these are listed as fixed 24 volt output

     but can certainly be 'jeeped' to lower their output

     setpoint.



 Of course if used with a laptop PC as per Bob's original suggestion, this point may be mute because the laptop has it's own issues.  But I'd be leery about using it around receiving equipment in an aircraft (or elsewhere).



     Astute observations. It's a pretty straightforward

     experiment to survey for potential interference

     problems . . . also not a big job to add enclosure

     and line filtering should they prove necessary.

     My suggestions about using the laptop were driven

     more by the idea of using the computer for data

     acquisition as opposed to in-flight entertainment

     or generation of work product. Of course, altitude

     limits conducive to hard drive functionality would

     have to be observed. I'll order one of these puppies

     with the idea of a permanent installation in my

     travel vehicle.



 

   Bob . . .    [quote][b]

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Sun Oct 17, 2010 7:46 pm Post subject: Laptop supply for your car/airplane

There are a few netbooks out there that don't have hard drives... might be

an idea.



Noel



--

_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

jimw_btg(at)earthlink.net
Guest

Posted: Mon Oct 18, 2010 5:55 am Post subject: Laptop supply for your car/airplane

Correct Noel,



There are several that are available with SSD eliminate the problem of the

HD at altitude, and from bouncing but we don't do that do we!!!!



Jim Wickert

Tel 920-467-0219

Cell 920-912-1014

--

pwmac(at)sisna.com
Guest

Posted: Mon Oct 18, 2010 6:50 am Post subject: Laptop supply for your car/airplane

Probably be a good idea to check the power consumption of the laptop. 

Mine with a 17" screen draws 185 to 195 watts when used with an 

inverter in my truck. More power is required for the dual hard drives

Paul

scott(at)n696js.com
Guest

Posted: Tue Oct 19, 2010 10:14 am Post subject: Laptop supply for your car/airplane

Actually hard drives are sealed units (air-tight).  They are built in clean

rooms to exacting standards.  The only thing that altitude will do is change

the air pressure outside causing strain on casing of the hard drive.



I have completely recovered data off of hard drives that were completely

immersed in floodwaters.  Once a roof collapsed and flooded a data center -

the hard drives were removed from the servers, dried out, placed in fresh

servers, and spun right up.



				

Scott R. Shook

RV-7A (Building)

N696JS (Reserved)



--

nuckolls.bob(at)aeroelect
Guest

Posted: Tue Oct 19, 2010 11:03 am Post subject: Laptop supply for your car/airplane

At 01:10 PM 10/19/2010, you wrote:

 --> AeroElectric-List message posted by: "Scott R. Shook" <scott(at)n696js.com>



 Actually hard drives are sealed units (air-tight).  They are built in clean

 rooms to exacting standards.  The only thing that altitude will do is change

 the air pressure outside causing strain on casing of the hard drive.



 I have completely recovered data off of hard drives that were completely

 immersed in floodwaters.  Once a roof collapsed and flooded a data center -

 the hard drives were removed from the servers, dried out, placed in fresh

 servers, and spun right up.



 

     Hmmmm . . . I can see that a drive might be liquid tight

     for low pressure heads but they're not well 'sealed'



 [img]cid:.0[/img]



    Looking at the spacing between cover screws that hold

    a thin sheet metal cover down against a gasket does not

    suggest any ability to keep the drive interior from

    exhausting at altitude. I've had one experience with

    a data gathering task where I put my laptop in

    the tail of a Beechjet. The intent was to stay below

    10K feet. I had other equipment in the passenger

    cabin too. During the flight, it was determined

    that we needed to go up in altitude. Putting a

    new hard drive in my laptop was a whole lot cheaper

    than the cost of fuel and $time$ to land and

    recover the un-protected computer.



    After the flight, the hard drive was trashed

    and could not be recovered. I seem to recall

    foam-plugged vent holes in hard drives that

    I've taken apart . . . but examination of

    the WD and Maxtors laying around right now

    failed to find one without tearing it apart.

    

    This teardown article speaks to an on-purpose

    hard drive vent.



  http://www.pcdoctor-guide.com/wordpress/?p=595



 

 

   Bob . . .

2f245c0.jpg

Description:

Filesize:

63.51 KB

Viewed:

9905 Time(s)

Tim Olson

Joined: 25 Jan 2007
Posts: 2879

Posted: Tue Oct 19, 2010 11:17 am Post subject: Laptop supply for your car/airplane

Definitely not true. They aren't sealed 100%, they have vents,

and over 10K' definitely does kill them.  I had a couple

that wouldn't operate at 13K' one day.  Switched to

SSD's because that's what you need over 10K.  Yes,

sometimes it'll be fine, but sometimes it won't.  And it

CAN damage the drive because the heads need to float on a

cushion of air, and even if it works, the cushion will

be less at altitude.



Air permeates the vents, even if water stays out

reasonably well.

Tim

On 10/19/2010 1:10 PM, Scott R. Shook wrote:

[quote] 



 Actually hard drives are sealed units (air-tight).  They are built in clean

 rooms to exacting standards.  The only thing that altitude will do is change

 the air pressure outside causing strain on casing of the hard drive.



 I have completely recovered data off of hard drives that were completely

 immersed in floodwaters.  Once a roof collapsed and flooded a data center -

 the hard drives were removed from the servers, dried out, placed in fresh

 servers, and spun right up.



 				

 Scott R. Shook

 RV-7A (Building)

 N696JS (Reserved)



 --

longg(at)pjm.com
Guest

Posted: Tue Oct 19, 2010 11:41 am Post subject: Laptop supply for your car/airplane

I understand solid state drives do not suffer the same demise. Where I

live on the east coast 10k in light airplanes is a bit like going to the

moon, so not really a factor over here. Take a good backup before you

leave.



Do not archive



Glenn E. Long

--

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