How can I make a usb mobile phone charger ?

[makri]

usb mobile phone charger

How can I make a usb mobile phone charger!!

pl help

 

[ian3871]

Re: usb mobile phone charger

Very simply you could just use a Zener diode resistor arrangement.

You can sink upto 500mA from USB port.

So get a zener for the voltage needed to charge the phone.

Set up as follows VCC--Resistor---Zener---Ground.

May work

Only took 2seconds to dream up :angel:

 

[iwf]

Re: usb mobile phone charger

It is easy,give you a sample:
**broken link removed**

 

[ian3871]

Re: usb mobile phone charger

It is easy,give you a sample:

Well this would not work I don't think !!

Mobile phones contain their own charging circuit don't they

So all that is needed is the correct voltage supply the phone will do the rest