Custom cable and custom charger (was: Re: FreeRunner Pricing and PVT update)
michael at openmoko.org
Mon Apr 14 14:45:47 CEST 2008
IIRC, the "custom cable" is actually part of the charger, i.e. charger
and cable is one unit.
If you think about it, this makes sense: If the cable were a separate
unit, you might plug the cable by accident into a charger (or worse,
your laptop) that could not deliver 1 Amp, the phone would think it was
hooked up to our custom charger and would start sucking 1 Amp. At best,
it wouldn't work, worse, it would damage your charger, worse yet, it
would damage the USB circuitry in your computer, very worst, it would
start a fire.
So the only safe place to install the custom ID resistor is in a charger
or charger+cable assembly that is known to be able to safely source 1 Amp.
I will document how to create such a custom cable, and I will provide
sources and part numbers for the connectors, but users will have to be
careful that this cable isn't inadvertently used with a charger not
capable of providing 1 Amp.
Marco Trevisan (Treviño) wrote:
> Lowell Higley ha scritto:
>> 1) include the custom (closed) cable or at least make it an option
> I do agree with this... Also if the cable is sold only by Openmoko it
> should be there, since it's a so important thing for using the phone as
> a "standard phone" (I not always have my PC around, and neither I should
> have electronics knowledge to build my own cable).
> If some people doesn't agree with its "philosophy", he could simply
> choose not to include it on the pack, or simply, to resell it...
> Imho it would be a too "closed" view, btw!
>> 2) ensure the manual includes that a standard USB cable will work. Be
>> sure to list the limitations of said cable. (I think the wiki has this
>> but it needs to be in the docs that go with the phone.)
> Ok, this could be a workaround, but just a workaround for me...
>> 3) publish the pinout / construction of the custom cable. Maybe
>> publish the BOM and your source of those items. Perhaps a 3rd party
>> could make a small ebay fortune out of this item.
> Of course for keeping up our idea and to help who loves self-making
> you'll have absolutely to publish these informations!
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