All About Symbian - Nokia (S60) and Sony Ericsson (UIQ) smartphones unwrapped

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Old 02-06-2008, 12:50 PM
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Charge your phone with a USB connector



I found this on another Forum and thought it may be of interest to some of you "techies":-

"HAND MADE" USB-CHARGE for NOKIA
This simple project shows you how to make a USB powered Nokia cell phone charger. The advantage is that it weighs much less than the bulky AC adaptor, and can be used wherever you have a computer or a laptop.

Step one: strip off the shielding and insulation on an inch or so of the usb cable. Clip the white and green cables to uneven lengths so they canít conduct into each other or either of the power lines. Hopefully you should be left with a black wire and a red wire.

Step two: Clip off a length of the nokia chargers phone-side plug. You wonít be needing the wall wart part anymore. Strip off the insulation from the nokia plug wire. Hopefully you should have a red wire and a black one. the red wire should be connected to the inner barrel of the plug, and the black one should be connected to the outer barrel.

Step three: Attach a normal silicon diode (not a zener diode) with the line part towards the nokia plug. It should go between the red wires from both cables (see image). Attach the black wires from each cable together.

I suggest staggering the lengths of the wires so that the solder joints have less chance of coming into contact.
Check all the wires with a multimeter to make sure they are really the right ones! The colors might not be standard...
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