Minty Boost && FreeRunner
cedric.berger74 at gmail.com
Thu Nov 20 17:45:46 CET 2008
On Thu, Nov 20, 2008 at 17:24, DJDAS <djdas at djdas.net> wrote:
> Cédric Berger ha scritto:
>> I did not have a look at neo's circuitry.
>> But whatever the method it uses, it cannot force 1A if 1A is not
>> available (wall charger unplugged from the wall won't give 1A :-p ) ?
> Uhm...not exactly true... Ohm Law says: V = R * I -> I = V/R, and if
> R->0 then I->oo
> In practice if you power a load with a little impedance (in real systems
> the load is not always only resistive) the current requested will grow
> and the source could be damaged (try to short circuit a normal battery,
> you'll see a flash and if you maintain the circuit closed you'll meld
> the battery).
> This is why you should not ask 1000mA from the USB port (for example)
> unless you're sure the hardware could give it.
> Bye :)
Yes but I also have some car adapters that "did not mind" being
shorted (12v to 5v adapter, given for 350mA). So I doubt a device
wanting 1A would be worst than a short circuit... but what would be
the output in such a case I do not know.
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