Same here. I thought the sine wave form was only an issue for desk top computers. Notebooks run on DC whether from brick or battery.
[EMAIL PROTECTED] wrote: > I'm not an engineer like some of you, but I run my computer on a > square wave inverter (as in cheap) and have no problems. I perceive > that as long as the battery is in the computer it absorbs (filters) > whatever comes in and cleans it up enough for the computer to handle > it okay. This may not be great for the long term, but I've had no > problems. > > > -----Original Message----- > From: Jim <[EMAIL PROTECTED]> > To: [email protected] > Sent: Sun, 29 Jun 2008 6:24 am > Subject: Re: [Liveaboard] 12v computer > > Philip & Marilyn wrote: > > Does any one run their laptop directly from the house mains? The > > output from my power brick says 17 volts, but the internal battery > > supplies 14.4 which most likely drops to less than 13.8 when under > > load - so nominal ~13v dc aught to run it. Question is where to make > > the connection. Just plug into the power inlet in the back like the > > brick does? > > > > Any problems with this hook--up? > > > > Thanks > > Philip > For all the reasons the others mentioned, you probably don't want to do > that. A small inverter is one way, however I have heard but can't > verify that the typical computer power supply does not like modified > square wave inverters. It is said that the circuitry in the power > supply that senses 120/220 is confused by a square wave and switches to > 220 mode for a brief instant which will cause premature failure. I > can't verify the accuracy of those statements. > > If you believe that two solutions come to mind. > > 1) Buy a true sine wave inverter. > This is a fairly expensive proposition. Also an unnecessary waste of > energy. Why convert 12v DC to 120V AC and then to 18 V DC? None of > these conversions are 100% efficient. > > The better choice is a DC/DC converter. These folks look like they make > them for about any laptop on the market. > http://www.powerstream.com/ > > I have a Targus for my Dell laptop and it works fine. > > There are lots of other universal laptop auto/12V adapters on the > market. Let you fingers (and Google) do the walking. > > Jim. > > _______________________________________________ > Liveaboard mailing list > [email protected] <mailto:[email protected]> > To adjust your membership settings over the web > http://www.liveaboardnow.org/mailman/listinfo/liveaboard > To subscribe send an email to [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > > To unsubscribe send an email to [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > The archives are at http://www.liveaboardnow.org/pipermail/liveaboard/ > > To search the archives > http://www.mail-archive.com/[email protected] > > The Mailman Users Guide can be found here > http://www.gnu.org/software/mailman/mailman-member/index.html > ------------------------------------------------------------------------ > Get the Moviefone Toolbar > <http://toolbar.aol.com/moviefone/download.html?ncid=aolcmp00050000000011>. > Showtimes, theaters, movie news, & more! > ------------------------------------------------------------------------ > > _______________________________________________ > Liveaboard mailing list > [email protected] > To adjust your membership settings over the web > http://www.liveaboardnow.org/mailman/listinfo/liveaboard > To subscribe send an email to [EMAIL PROTECTED] > > To unsubscribe send an email to [EMAIL PROTECTED] > The archives are at http://www.liveaboardnow.org/pipermail/liveaboard/ > > To search the archives > http://www.mail-archive.com/[email protected] > > The Mailman Users Guide can be found here > http://www.gnu.org/software/mailman/mailman-member/index.html -- Philip McConnell USSV Gryphon 1987 Tayana 52 CC Cutter Punta Gorda, FL _______________________________________________ Liveaboard mailing list [email protected] To adjust your membership settings over the web http://www.liveaboardnow.org/mailman/listinfo/liveaboard To subscribe send an email to [EMAIL PROTECTED] To unsubscribe send an email to [EMAIL PROTECTED] The archives are at http://www.liveaboardnow.org/pipermail/liveaboard/ To search the archives http://www.mail-archive.com/[email protected] The Mailman Users Guide can be found here http://www.gnu.org/software/mailman/mailman-member/index.html
