Hi Jordan, On Thu, 15 Mar 2007, Jordan Crouse wrote:
> On 15/03/07 23:53 -0400, [EMAIL PROTECTED] wrote: > > Hi Bert, > > > > On Fri, 16 Mar 2007, Chris Ball wrote: > > > > > Hi Bert, > > > > > > > Hi folks, what voltage does the power jack actually accept? > > > > > > The current safe range is 10-19V; the input caps are rated at 25V. > > > > You could power that from a solar cell without need for a charge > > controller or external regulator. How many Amperes do the boards > > require? how many Amp Hours do the batteries hold, at what voltage? > > Very, very crude measurements indicate that a B1 board drew about > .625 amps full on at 12V. Does that include display? What is the current draw when charging the battery? I'm guessing 1.5 A or so. So approximate 18-20W of PV per board assuming the battery is depleted when connected to the power source. Were this installed in a school of say, 20 students, a 400W PV array could operate the laptops during the school session, and send the children home with fully charged batteries. One would probably want a charge controller and battery system for such an application, as there would likely be static local devices to power also, but for a single laptop a 15W panel would likely do without the additional electronics, assuming my specualtion as to draw while charging is correct. Scott > > Jordan > > -- > Jordan Crouse > Senior Linux Engineer > Advanced Micro Devices, Inc. > <www.amd.com/embeddedprocessors> > > _______________________________________________ Devel mailing list [email protected] http://mailman.laptop.org/mailman/listinfo/devel
