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Go Back   1src Forums > Sony > Clie UX-series
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Old 02-10-2005, 02:31 PM   #31
JAmerican
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Quote:
Originally Posted by antoinepierre
I have this one, very nice but very big !


Could you take a comparitive pic of the Battery Extender and the UX.

Thanks

JAmerican
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Old 02-10-2005, 07:47 PM   #32
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Quote:
Originally Posted by djboa
well, there is no electronics in the usb charging cradle that cuts off the usb voltage when the battery is full .... so if you have the guts to use the usb cradle as is, this is pretty much the same ...

and connecting the batteries after each other in series with the points in the bottom of the ux should work, just be sure you are doing it to the correct points!

From what I gather from a couple of JAmerican's pictures (thanks JAmerican), it looks like there's a small transformer arrangement inside the standard JC40 charger cradle (You know, you wrap wires a certain amount of times around a round magnet, then on the other side, you wrap more around a different number of times.. steps the current/voltage up/down IIRC from physics). So this is not needed anymore...?

Looking at the bottom of the JC40, it says, 2000mA. The UX40, however, only says 1A. This is not a problem if I connect my batteries directly to the UX40? (This is different from the mAh that was discussed earlier, no? Eg, the car battery example).

Has anyone tried the direct method of connecting the series of batteries to the bottom of the UX yet?

I need to see if I can find any wires that I can use to try this... also need to find the time and the guts to connect something to my UX40 that I put together myself...

Please do excuse my ignorance..
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Old 02-10-2005, 07:55 PM   #33
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there should be a battery extender competition to see who has the best design.
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Old 02-10-2005, 10:03 PM   #34
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Quote:
Originally Posted by SonyStyle
there should be a battery extender competition to see who has the best design.


Then out of all I've seen so far, the talented Hippo won.

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Old 02-11-2005, 02:49 AM   #35
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Quote:
Originally Posted by JAmerican
Could you take a comparitive pic of the Battery Extender and the UX.
Sorry, I've only a old camera, with a film, not a digital camera.
If you want, I can give you the size of this battery extender.
EDIT : Here's the result : 14.5 x 4.8 x 2.0 cm.
compared to UX : 10.0 x 8.5 x 1.7 cm

For the beauty contest , my opinion :
- last : surplusPDA, the cheapest.
- third : semsons with flashlite.
- second : boxwave.
- first : this semsons.

Last edited by antoinepierre : 02-11-2005 at 03:15 PM.
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Old 02-13-2005, 04:34 AM   #36
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Hi my first post in this forum.

Ever heard of Columbusí egg?

Well after seeing djboaís obvious simple and great idea I banged my head on the wall for not having the idea myself. I was looking to make some kind of battery backup for the power hungry UX50.

I just wanted to show you my version all merits still go to djboa.

What I used

1 Brando case with USB charging socket
1 Flat 4 AA battery holder
4 2300mAh 1.2Volts Ni-MH AA batteries
1 USB cable extension (from my USB memory pen which I never used)
Super Glue
Hot glue gun

As you can see from the photos it isnít pretty but its cheap and works fine. I first used some super glue to fix the socket to the battery holder then I used the hot glue for protection, insulation and added strength. The hot glue isnít good to be shaped but you can use some epoxy acrylic adhesive which you can then sand to a perfect shape.

The plus for using the USB socket is that it can be used for any USB powered device and I didnít want to sacrifice the UX50 USB cable.

The flat battery holder could be attached to the Brando case from below with some adhesive Velcro and with the use of the Brando retractable USB cable which I think can also be attached to the case with some Velcro you get a bit large but compact extra battery pack.

Thatís all and thanks again to djboa for the great idea.
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Old 02-13-2005, 01:46 PM   #37
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I tried connecting a battery pack via wires directly to the back of the clie. The clie did not charge from this connection. My ux50 will no longer charge when placed on the charger cradle. I took the battery out and it still works and my cradle also works. I also did a hard reset and other things and still the clie will not charge I even replaced the battery with a new one and it will still not work. my palm is at 20 percent battery right now and everything works but when it dies I will have to buy a new ux50. Any ideas on how to fix this or do I just buy a new one which I would not mind doing?
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Old 02-13-2005, 02:47 PM   #38
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I tried the same thing and I think my device might not be able to charge either. I have to wait until my leather charger cradle comes to test it out. If it doesn't charge, I might have to do the USB power setup. Hopefully that will work.

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Old 02-13-2005, 05:33 PM   #39
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I'm wondering if that has to do because of the difference in current? I notice that the UX says 1A on the back of it.. So the cradle must step this down.
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Old 02-13-2005, 05:43 PM   #40
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Whatever it is. I hope I can charge my device once my new cradle comes.

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Old 02-13-2005, 06:25 PM   #41
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you don't step current up or down, voltage yes ... and the cradle does not step anything down ... at least not how I understand hippo's schematic, or the workings of the usb cradle

which points on the back did you try to connect to?
asking since hippo is modifying a voltage sensor input designed for 3.6-4.2V, and charging through that ... if you are using this point without the modifications ...

but if you are using the 5v input point with the battery ... then I am at a loss for words ... just checked the usb cradle:
usb cable - voltage at pins 5.36V
batteries freshly charged - voltage at pins 5.33V
batteries freshly charged - voltage at batteryholder 5.33V

when looking down at the charger with the pins in the front the pinout is:

ground | not connected | not connected | 5v

will it still work with an unoriginal charger ... depends, cross your fingers ...
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Old 02-13-2005, 07:05 PM   #42
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Quote:
Originally Posted by djboa
you don't step current up or down, voltage yes ... and the cradle does not step anything down ... at least not how I understand hippo's schematic, or the workings of the usb cradle...

Sorry, my mistake there..

I think what I meant to be saying was that it looks like there's a transformer in the JC40. This is what I gather from looking at hippo's pictures of his work. Particuraly these two pictures of the insides of the JC40 charger cradle:
http://photobucket.com/albums/v95/t...ent=Board1a.jpg
http://photobucket.com/albums/v95/t...=PEGA-JC40K.jpg

That ring looks like a magnet to me. And IIRC, aren't current and voltage inversly proportional? Trying to remember, but it's fuzzy in my mind. So stepping up voltage decreases current and vice versa?

Though, I am begining to question why I started wondering about this in the first place. Am I making any sense?

However, looking at the pictures again, it looks like the wires are twisted only on one side of the magnet.

Anyways... I am probably way out of my league here.

But FWIW and IIRC, more current increases resistance, correct? Not sure if this would have anything to do with it anymore...
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Old 02-13-2005, 07:11 PM   #43
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Do you think sometihng could have short-circuited?

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Old 02-13-2005, 07:20 PM   #44
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a magnet used in that configuration is not a transformer, its somewhat like a low pass filter ... think of it as cleaning the supply ...

remembering back to physics ... 15 years back ... P=U x I where P is watts, U is voltage and I is current ... explains why you sometimes see W, and sometimes VA ...

so yeah there is a connection ... but in my mind it something like you supply the voltage and the subject pulls however much current it needs, determining the wattage.

a rating on a piece of equipment is how much it will use given a correct voltage
a rating on a wallwart or other powersupply is more like a guide of how much you can suck out of it before it burns up ...
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Old 02-13-2005, 07:23 PM   #45
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jamerican, i think you either reversed the polarity and fried the charging circuit ... or connected to a wrong pin and fried something else that has to do with the charging circuit ...
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