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[Q] Old Nokia Charger for Defy

8th April 2012, 01:22 PM |#1  
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Hello Defyers

I have an Old (small pin) nokia car charger its specs as the following

- Input 12v DC
- output 5.7 V 890 mA

I want to convert this small pin charger to a micro USB by some cutting and wiring

My concern is... if i use this charger with my Defy will i fry it...

its standard charger produced 5V , 850mA

with that 0.7V difference i might overload my circuts but it will work in the end

or i will end up with a black shiny brick

my defy is over clocked and running CM7
Last edited by matout7; 8th April 2012 at 05:40 PM.
 
 
8th April 2012, 09:25 PM |#2  
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I've been using this adapter for a while (got it with the E52 from work). Donn't know about rewiring (might be hard to find a "blank" microUSB jack).

Cheers!
15th April 2012, 08:37 AM |#3  
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use 5 volt regulator IC in output voltage..
The Following User Says Thank You to Nol3Le For This Useful Post: [ View ]
22nd April 2013, 08:41 AM |#4  
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Use a diode in forward bais it give .7 voltage drop across it ...


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20th May 2013, 03:16 AM |#5  
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USB specs allow for a 10% voltage tolerance and that's a conservative safety margin. If your 5.7V charger really spits out 5.7V (and not 5.7 + 10%) you have nothing to worry about.
29th June 2013, 06:07 AM |#6  
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Quote:
Originally Posted by rogier666

USB specs allow for a 10% voltage tolerance and that's a conservative safety margin. If your 5.7V charger really spits out 5.7V (and not 5.7 + 10%) you have nothing to worry about.

you must strip the wires, cut the white and green and put them together, black and red leave them as they are, i have an 2000mAh charger built from a router adaptor and it is working very good, and that i have solved the problem with auto charger that is not OEM- Motorola.
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