Matthias Apitz wrote: > El día Thursday, November 20, 2008 a las 02:04:22PM +0100, Tilman Baumann > escribió: > >> Matthias Apitz wrote: >>> El día Thursday, November 20, 2008 a las 01:47:43PM +0100, Tilman Baumann >>> escribió: >>> >>>> Matthias Apitz wrote: >>>>> El día Monday, September 22, 2008 a las 11:17:58PM +0200, Matthias Apitz >>>>> escribió: >>>>> >>>>>> Hello Stacy, >>>>>> >>>>>> I've stumbled over your page http://www.millions.ca/~stacy/mintyboost/ >>>>>> and as an owner of the FreeRunner I will build this nice box; thanks for >>>>>> your pioneer work on this; ... >>>> Shouldn't it be easy to add this 'wall charger indicator resistor' to >>>> the mintyboost circuit? >>>> I don't remember where that resistor needs to go, but this can be >>>> researched on the wiki... >>> What would be the bennefit of this? I'm not an electronic guy anymore >>> :-( >> 1A charging out of the box with no software needed. > > Here is what the Wiki page says: > > http://wiki.openmoko.org/wiki/Neo_FreeRunner_Battery > > «DIY external battery pack from a Minty case > Mintyboost: > Charge from a couple of AA batteries: Minty Boost!, report on a Neo > FreeRunner application. > Adding the 47k resistor to the minty boost so that the Freerunner fast > charges at 1A is a poor idea for a couple reasons, the biggest one being > that the minty boost can't supply 1A the max is 600mA.
Ups, that's a pitty. I did not anticipate this. > Even if the Linear Technology step up voltage converter is supposed to > be able to do 600mA, the AA cells seem to have a problem with supplying > 500mA. They get a little toasty :-). One powerpack built using D cells > doesn't seem to have any issues with supplying 500mA.» Well, Batteries usually put out a great much of current without suffering too much. I could not find any specifications (which of course vary) on a short notice, but I don't think that 5W (plus a little bit loss in the converter) is too much. Maybe we just need to make a heavy duty mintyboost with a bigger converter... > My FR switches outomagically to 1A charging mode, but maybe it's better > to only use 500mA Probably. The reports of hearing the converter when it is under load support this. -- Drucken Sie diese Mail bitte nur auf Recyclingpapier aus. Please print this mail only on recycled paper. _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community