Re: [H] Running laptop of DC

2008-07-08 Thread Gary VanderMolen

Unless he can regulate that DC to the exact voltage (18.5-19.5) required
by the laptop, it would be safer to get an inverter and use that to feed
the AC adapter that came with the laptop.

Gary VanderMolen, MS-MVP

--
From: Thane Sherrington [EMAIL PROTECTED]
I have a person who is off-grid and wants to run his laptop off the DC power he produces.  Is there a device that will let him 
bypass the power adapter that comes with the laptop to do this and is it recommended? 




Re: [H] Running laptop of DC

2008-07-08 Thread Brian Weeden
But that's a DC to AC to DC conversion and going to lose a lot in the
conversions.  Generate quite a bit of heat too.

Best thing would be to find a PSU that can feed off 12V DC.  I did that way
back in 1998 when I put a computer in my car to play MP3s.  Wasn't all that
expensive, just a bit hard to find.  Not sure if the same thing exists for
laptops.


Brian

On Tue, Jul 8, 2008 at 12:53 PM, Gary VanderMolen [EMAIL PROTECTED]
wrote:

 Unless he can regulate that DC to the exact voltage (18.5-19.5) required
 by the laptop, it would be safer to get an inverter and use that to feed
 the AC adapter that came with the laptop.

 Gary VanderMolen, MS-MVP

 --
 From: Thane Sherrington [EMAIL PROTECTED]

  I have a person who is off-grid and wants to run his laptop off the DC
 power he produces.  Is there a device that will let him bypass the power
 adapter that comes with the laptop to do this and is it recommended?





Re: [H] Running laptop of DC

2008-07-08 Thread Neil Davidson
Not all laptops run at 19v

My old HP (3 years old I think), runs at 12v. My current Asus does run at
19v though.

If the laptop does require more than 12v, have a look in auto electrical
places, or just electronics stores that do some auto electrical stuff.

Maplin (http://www.maplin.co.uk) over here have laptop power adapters that
run off 12v.

http://www.maplin.co.uk/search.aspx?MenuNo=12245FromMenu=ydoy=8m7

they even go as high as 120watt, which i'm surprised about.

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Brian Weeden
Sent: 08 July 2008 18:00
To: hardware@hardwaregroup.com
Subject: Re: [H] Running laptop of DC

But that's a DC to AC to DC conversion and going to lose a lot in the
conversions.  Generate quite a bit of heat too.

Best thing would be to find a PSU that can feed off 12V DC.  I did that way
back in 1998 when I put a computer in my car to play MP3s.  Wasn't all that
expensive, just a bit hard to find.  Not sure if the same thing exists for
laptops.


Brian

On Tue, Jul 8, 2008 at 12:53 PM, Gary VanderMolen [EMAIL PROTECTED]
wrote:

 Unless he can regulate that DC to the exact voltage (18.5-19.5) required
 by the laptop, it would be safer to get an inverter and use that to feed
 the AC adapter that came with the laptop.

 Gary VanderMolen, MS-MVP

 --
 From: Thane Sherrington [EMAIL PROTECTED]

  I have a person who is off-grid and wants to run his laptop off the DC
 power he produces.  Is there a device that will let him bypass the power
 adapter that comes with the laptop to do this and is it recommended?






Re: [H] Running laptop of DC

2008-07-08 Thread xtempore

On Tue, 08 Jul 2008 13:00:54 -0300
Thane Sherrington [EMAIL PROTECTED] wrote:

 I have a person who is off-grid and wants to run his laptop off the 
 DC power he produces.  Is there a device that will let him bypass the 
 power adapter that comes with the laptop to do this and is it recommended?
 

I think most models of laptops have a car adaptor.  If your friend is
not producing 12VDC, an off the shelf solution may be difficult.

Best,
al


Re: [H] Running laptop of DC

2008-07-08 Thread Brian Weeden
Ah yeah car adapter - that would be the best.

On Tue, Jul 8, 2008 at 4:39 PM, [EMAIL PROTECTED] wrote:


 On Tue, 08 Jul 2008 13:00:54 -0300
 Thane Sherrington [EMAIL PROTECTED] wrote:

  I have a person who is off-grid and wants to run his laptop off the
  DC power he produces.  Is there a device that will let him bypass the
  power adapter that comes with the laptop to do this and is it
 recommended?
 

 I think most models of laptops have a car adaptor.  If your friend is
 not producing 12VDC, an off the shelf solution may be difficult.

 Best,
 al