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Hints for building USB battery charger for iPod

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ck84

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Hello everybody, I am trying to build a USB battery charger for my iPOD shuffle. Can anybody give me a hint? I will greatly appreciate your help.
 

v_c

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Re: USB battery charger.

This should get you started.

**broken link removed**

You will also have to determine the characteristics of the battery
and maybe the charging profile.

Best regards,
v_c
 

    ck84

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Jack// ani

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USB battery charger.

hi all,

is it possibble to charge the ipod/other mp3 players, by simply putting external 5v dc with a current limiting resistor in series.....of the player's usb port and leaving the data pins unconnected??

i asking because...charging the battery via pc's usb port may not be possible on occasions....so a standanole charger turns quite useful!!!

thanks
 

ehsanelahimirza

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Re: USB battery charger.

Jack// ani said:
hi all,

is it possibble to charge the ipod/other mp3 players, by simply putting external 5v dc with a current limiting resistor in series.....of the player's usb port and leaving the data pins unconnected??

i asking because...charging the battery via pc's usb port may not be possible on occasions....so a standanole charger turns quite useful!!!

thanks


yes its possible but u have to use such an adopter that u r not using any resistance in series and it is supplying only required amount of current.

but if u cant find such an adopter, u have to select such a resistance that is not blocking all the current or max current. bcz mp3players have too low resistance for inputs so an AC2DC adopter with 200mA or something same would b used
 

Jack// ani

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USB battery charger.

hi ehsanelahimirza,

thanks for reply....have to ever tried charging you player that way?? i'm asking because i dont want to end up blowing my $100 player!!!
 

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