Charging Via Usb?

[samxiao]

is it possible i get the C7x0/C8x0 series Serial-USB cable and charge that way instead?

I don't think so. The C7x0/C8x0 could be recharged by simply using the USB connector, while the C3x00/C1000 can only be recharged via the DC plug, as far as I understand...
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but doesn't C3x00/C1000 has a serial port too?

maybe someone has a whitepaper or some sort to give us some hints

[euroclie]

but doesn't C3x00/C1000 has a serial port too?

maybe someone has a whitepaper or some sort to give us some hints

I think that guys from TriSoft or Conics would be good candidate as they are really specialist in the Zaurus area, and could possibly have the answer to that question.

As far as I can remember (from reading this board and other stuff on the net), the C3x00 indeed features a Sharp connector under the little gray rubber cover on the back, and it seems that this connector can be used (with the appropriate cable) as a serial cable. But since the USB connector isn't connected to the battery charging circuit, I seriously doubt that the serial (Sharp) connector under that rubber cover would be connected to the charging circuit...

That being said, the C3000 is my first Zaurus, and as such I have never used the Sharp connector... Does this connector, on older devices that have it too, let you charge the battery?

[Stubear]

but doesn't C3x00/C1000 has a serial port too?

maybe someone has a whitepaper or some sort to give us some hints
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Yes, it does. It is hidden behind the gray plastic cover.

However, I've heard that it is only a serial port and can't be used for charging the zaurus. So you might be taking a big risk trying to charge using it.

Also the cover doesn't come off easily (not like the C760 cover) so you might break something tyring to get it open

Stu

[TRIsoft]

I think that guys from TriSoft or Conics would be good candidate as they are really specialist in the Zaurus area, and could possibly have the answer to that question.

Hi everybody,

and here is the answer:

First have a look at the documentation of the SHARP I/O port
for the Zaurus series. It's free available here:
SHARP Documents for the I/O port

Charging the SL-5x00 / SL-C7x0 / SL-C860 via the I/O port was
done using the pins 1+2 / 15+16 .

These pins are not connected in the SL-C1000/3000/3100.
So there's no way to use the USB-charging cables or the serial
cable with the power jack to charge a Zaurus of the SL-Cxx00 series.

Connected pins on the SL-Cxx00 series are: 3,4,5,6,7,8,10,11,13 and 14.
So only the serial / wakeup functions are supported on the new Zauris.

///TRIsoft

Marc Stephan

[wavetossed]

While we are on the topic of charging via the USB port, does anyone know whether there are battery powered hubs available? Seems to me that the hub electronics wouldn't add much size to an external battery pack that runs off 4 rechargeable AA batteries.

[landloper]

While we are on the topic of charging via the USB port, does anyone know whether there are battery powered hubs available? Seems to me that the hub electronics wouldn't add much size to an external battery pack that runs off 4 rechargeable AA batteries.
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The hub Patrick is using is powered via 5V dc, connect it to a 4 NiMH batterypack and this hub is 'battery powered' I should think.

Rick

[daniel3000]

Okay guys, I did it.
I made a simple USB -> Zaurus DC plug cable and it does a very nice job charging the Zaurus.

SImply take any USB cable with an USB A plug, but the other side off. YOu will find four wires, two of them probably being red and black. Cut off the other wires and the shielding.

Connect the USB plug to a computer and measure if the red and black leads really have 5V and if the black on e is really minus and the red one really plus.
(make sure not to shorten them, I don't know the the USB port of the computer will stand a short-circuit).

Take a DC plug fitting the Zaurus' DC connector and solder it to the red and black wires so that minus is at the outside and plus at the inside. Insulate everything well!

Again connect the USB plug to a computer and measure once more if really there are exactly 5V (4,9 or 5,1 are also okay) and if the OUTSIDE of the plug has minus and the inside of the plug has plus 5 V!

And voila, there is a quite cheap charging cable, which is easy to carry around. You only need a computer with an USB port to charge your Zaurus.

My recommendation: On each computer you don't know yet, first perform a measurement if there are really 5V on the USB port.
Especially be careful with powered USB hubs!!

Maybe I will enhance the cable with a voltage stabilizer later to avoid overvoltage even on sloppy hubs.

daniel

[jpmatrix]

Okay guys, I did it.
I made a simple USB -> Zaurus DC plug cable and it does a very nice job charging the Zaurus.

it seems great ! i 'd try asap

anyway is the P-Cord available somewhere in europe ?

[jpmatrix]

Maybe I will enhance the cable with a voltage stabilizer later to avoid overvoltage even on sloppy hubs.

daniel
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hi!
i'm about to build your usb charging cable  perhaps tonight...
did you put the voltage stabilizer ?

[tomisako]

Testing tonight PSP usb charging cables.

Here comes photos:
Dragonplus and Kaiyue boxes
[img]http://people.jyu.fi/~tomisako/z/psp-usb/dragonplus_and_kaiyue.jpg\" border=\"0\" class=\"linked-image\" /]
Closer look Dragonplus...
[img]http://people.jyu.fi/~tomisako/z/psp-usb/closer_look_dragonplus.jpg\" border=\"0\" class=\"linked-image\" /]
Kaiyue plugged in the Z
[img]http://people.jyu.fi/~tomisako/z/psp-usb/kaiyue_charge_and_data.jpg\" border=\"0\" class=\"linked-image\" /]
Kaiyue
[img]http://people.jyu.fi/~tomisako/z/psp-usb/kaiyue_charge_and_data_2.jpg\" border=\"0\" class=\"linked-image\" /]

Tested Kaiyue (from Polarpanda <- Good Service!) and it seems to charge like it should.

Kaiyues PSP mini usb is different gender than Z's original syncing cable's mini plug.
So sync with this cable isn't possible..?

[GadgetGuy]

Testing tonight PSP usb charging cables.

I will report here.
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I have bought on ebay a PSP charging cable. Works great with my C3100! ( and it should, as some places sell the PSP charger for the Zaurus )

[jpmatrix]

great piece of news !
i'll go to night to french shops selling PSP bo buy a PSP ... heuuuu... a PSP charging cable

[Da_Blitz]

for a quick and dirty way of protecting against high voltage inputs on the usb lines get a 5.1v zener diode and a resistor, wire tehm together (in series) and then attach them between the 5v and gnd line

quick and dirty low dropout voltage regulator, for those who want protection for high voltages from usb hubs

hope that helped (the triangle symbol for the zener should be pointing at the 5v line, on the device itself its a line so line should be on the 5v side)

[daniel3000]

for a quick and dirty way of protecting against high voltage inputs on the usb lines get a 5.1v zener diode and a resistor, wire tehm together (in series) and then attach them between the 5v and gnd line

quick and dirty low dropout voltage regulator, for those who want protection for high voltages from usb hubs

hope that helped (the triangle symbol for the zener should be pointing at the 5v line, on the device itself its a line so line should be on the 5v side)
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I have tried such a simple voltage limiter circuit, but unfortunately the low input resistance of the Zaurus makes this unusable, as the current limiting resistor for the Zener diode is always too large in comparison to the Zaurus inner resistance.
That makes the two resistors (limiting and Zaurus inner one) a voltage divider and the voltage over the limiting resistor is always so high that the remaining voltage for the Zaurus is way below 5V :-(

The limiting resistor would have to be so small in value that it cannot limit the current enough.

daniel

[jpmatrix]

what about this one :
http://shop.brando.com.hk/3in1chargerforpsp.php
3-in-1 charger for ... Zaurus ?