is 0.4A sufficient for charging?
lehner at edv-buero-lehner.de
Tue Jun 23 08:09:19 CEST 2009
On Tue, 23 Jun 2009, ivvmm wrote:
> going to buy a device from a local store that will convert alternating
> current from my bicycle's front hub dynamo to 5V 0.4A. Is that
> sufficient for charging my Neo?
I have soldered such a device by myself and it works. I think the phone
needs only a little more than 120mA for charging, depending on which
features are powered on (GSM, Bluetooth, WiFI, GPS etc).
The main problem that I see is, that the FR will not recognize the load it
may pull from the USB line if you don't put that magic resistor between
the Id and GND pin of the USB plug.
You can also use the power_center tool to force a charge of 500mA, but I
believe it falls back to 100mA as soon as the power supply drops (what
will happen if you stop bycicling). So a battery-buffered solution would
BTW: Could you please send a link to the shop where you found this DC
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