Great info. Whether the car starts is not necessarily an issue (as funny as that sounds). The draw of the LCD is what is making the most difference so we may need to settle on a smaller, lower power LCD. On 2/1/07, Larry R. Pint <Larry.Pint at ntuminc.com> wrote: > Nevermind .... I'm used to working in standard AC voltages, forgot about > cars being 12 volts. > > Sorry! > > Larry > > > > -----Original Message----- > > From: tclug-list-bounces at mn-linux.org [mailto:tclug-list-bounces at mn- > > linux.org] On Behalf Of Jonathon Jongsma > > Sent: Thursday, February 01, 2007 1:11 PM > > To: Donovan Niesen > > Cc: tclug-list at mn-linux.org > > Subject: Re: [tclug-list] OT: CoM and LCD display... expected life on > a > > carbattery? > > > > On 2/1/07, Donovan Niesen <dniesen at gmail.com> wrote: > > > I'm considering a project that would involve connecting a very > > > low-power Computer on Module and an LCD display inside a vehicle. > The > > > vehicle will not be driven or possibly even started for an entire > week > > > so what I'm wondering is if anyone knows how long I might have on a > > > fairly standard car battery if I'm using ~35 Watts from the LCD and > > > the CoM? > > > > > > My goal is a full 7 days so if I need to use a lower power LCD so be > > > it. Otherwise I will need to find a different way to power the > > > device. > > > > > > And yes, the CoM will be running Linux. > > > > The computer will be consuming 35W even when the vehicle is not in > > use? That's about 3A of current (assuming a 12V supply). > > It should be fairly easy to determine how long your battery will last > > by looking at your battery rating. I think (though I don't know for > > sure, I may be wrong) most standard car batteries are between 50-100 > > Amp-hours when fully charged. So at approximately 3A, the battery > > should last between 17 and 33 hours. > > -- > > jonathon jongsma > > > > _______________________________________________ > > TCLUG Mailing List - Minneapolis/St. Paul, Minnesota > > tclug-list at mn-linux.org > > http://mailman.mn-linux.org/mailman/listinfo/tclug-list > -- Donovan Niesen