Andre Lanvermann wrote:
Oooh, the it seems i missunderstood the previous Messages. I was sure
that there is NO Charger
for the NEO Except the USB Port of a Computer. Im sorry :(
Greetings
Andre
Hi Andre, and welcome to the project.
You have to distinguish between the two models of Neo.
There was no charger for the Neo 1973.
There will be a charger for the Neo Freerunner, which has the secret
resistor jOERG mentions below.
Michael
joerg schrieb:
Am Do 28. Februar 2008 schrieb Andre Lanvermann:
I read the Archives and found this Topic. I own a T-Mobile MDA Vario.
The device is
charged via USB too. And theay included an USB Wallcharger. Have
anybody allready checked
this charger?
Device Data:
Delta Electronics inc.
AC Adapter HTC P/N: 79H00051-02M
Model: ADP-5FH C
Input: 100-240V~ 0,2A 50-60hz
Output: 5V = 1A LPS
Frequency Level 4
What i've learned so far:
The strange thing with USB-charger is a resistor of certain Ohms (47k
IIRC) that's supposed to connect 2 pins of the charger's plug "to
identify OM-charger".
I can't say whether this is standard for USB-chargers, or what will
happen when NEO doesn't sense this resistor on USB-power detection.
Charging seems to be controlled by the main CPU via PCU-chip. If
there's no CPU control e.g. due to completely flat accu, only a very
low secure trickle charge takes place (->"if you can't power on your
NEO, connect to USB and try again after ~30 min..."). There are
chances this will be the same for missing resistor, depending on what
logic is in the "driver".
Maybe one of the devs may shed some more light on this.
jOERG
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