MP3 player - charging

  • Thread starter Glenda and Bob Scott
  • Start date
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Glenda and Bob Scott

Guest
I have a Sony NWD B103F MP3 player that is designed to charge its battery
through a USB computer connection.


I don't always have a computer with me when I want to use the MP3 player, so
I have tried to charge the battery by simply connecting a regulated 5 volts
to the correct USB power pins (Pins 1 and 4, with no connections to pins 2
and 3). However, this does not work with the B103F. It seems that it is
necessary to more closely simulate a USB port, presumably with voltages (or
no voltages) on the USB data pins (Pins 2 and 3).


Does anyone know how this can be done, please?
 
"Glenda and Bob Scott" <glenbob@removethisaanet.com.au> wrote in message
news:fook1d$7cp$1@aioe.org...
I have a Sony NWD B103F MP3 player that is designed to charge its battery
through a USB computer connection.


I don't always have a computer with me when I want to use the MP3 player,
so I have tried to charge the battery by simply connecting a regulated 5
volts to the correct USB power pins (Pins 1 and 4, with no connections to
pins 2 and 3). However, this does not work with the B103F. It seems that
it is necessary to more closely simulate a USB port, presumably with
voltages (or no voltages) on the USB data pins (Pins 2 and 3).


Does anyone know how this can be done, please?


http://www.dse.com.au/cgi-bin/dse.storefront/en/product/M9942
Click to expand...

Try this.

Cheers TT

PS You can get car cigarette lighter ones as well
 
Glenda and Bob Scott wrote:
I have a Sony NWD B103F MP3 player that is designed to charge its battery
through a USB computer connection.


I don't always have a computer with me when I want to use the MP3 player, so
I have tried to charge the battery by simply connecting a regulated 5 volts
to the correct USB power pins (Pins 1 and 4, with no connections to pins 2
and 3). However, this does not work with the B103F. It seems that it is
necessary to more closely simulate a USB port, presumably with voltages (or
no voltages) on the USB data pins (Pins 2 and 3).


Does anyone know how this can be done, please?
Click to expand...
Some devices require an actual USB handshake before they start drawing
enough power to charge - This is the USB spec. Unfortunately, that
requires a complete USB host controller in the charger. Every charger
that I've seen is just a dumb +5V supply, so some polite devices can't
be charged.

Cheers,
Nicholas Sherlock
 
"Nicholas Sherlock" <N.sherlock@gmail.com> wrote in message
news:foqgik$17p$2@lust.ihug.co.nz...
Glenda and Bob Scott wrote:
I have a Sony NWD B103F MP3 player that is designed to charge its battery
through a USB computer connection.


I don't always have a computer with me when I want to use the MP3 player,
so I have tried to charge the battery by simply connecting a regulated 5
volts to the correct USB power pins (Pins 1 and 4, with no connections to
pins 2 and 3). However, this does not work with the B103F. It seems
that it is necessary to more closely simulate a USB port, presumably with
voltages (or no voltages) on the USB data pins (Pins 2 and 3).


Does anyone know how this can be done, please?

Some devices require an actual USB handshake before they start drawing
enough power to charge - This is the USB spec. Unfortunately, that
requires a complete USB host controller in the charger. Every charger that
I've seen is just a dumb +5V supply, so some polite devices can't be
charged.

Cheers,
Nicholas Sherlock
Click to expand...
Thank you, Nicholas, and thank you also, TT, for your informative responses.
It seems that building (or even buying) a suitable USB charger is not a
simple matter. I will just have to continue relying on a computer to keep
the B103F charged.

Regards
Bob
 
"Bob" <glenbob@removethisaanet.com.au> wrote in message
news:fou6tu$haa$1@aioe.org...
"Nicholas Sherlock" <N.sherlock@gmail.com> wrote in message
news:foqgik$17p$2@lust.ihug.co.nz...
Glenda and Bob Scott wrote:
I have a Sony NWD B103F MP3 player that is designed to charge its
battery through a USB computer connection.


I don't always have a computer with me when I want to use the MP3
player, so I have tried to charge the battery by simply connecting a
regulated 5 volts to the correct USB power pins (Pins 1 and 4, with no
connections to pins 2 and 3). However, this does not work with the
B103F. It seems that it is necessary to more closely simulate a USB
port, presumably with voltages (or no voltages) on the USB data pins
(Pins 2 and 3).


Does anyone know how this can be done, please?

Some devices require an actual USB handshake before they start drawing
enough power to charge - This is the USB spec. Unfortunately, that
requires a complete USB host controller in the charger. Every charger
that I've seen is just a dumb +5V supply, so some polite devices can't be
charged.

Cheers,
Nicholas Sherlock

Thank you, Nicholas, and thank you also, TT, for your informative
responses. It seems that building (or even buying) a suitable USB charger
is not a simple matter. I will just have to continue relying on a
computer to keep the B103F charged.

Regards
Bob
Did you try the DSE unit I suggested and it didn't work? I know it works
Click to expand...
with iPods and Creative's Zen Touch.

Cheers TT
 
"TT" <TTencerNoSpAm@westnet.com.au> wrote in message
news:13r5snj3vjmtd8@corp.supernews.com...
"Bob" <glenbob@removethisaanet.com.au> wrote in message
news:fou6tu$haa$1@aioe.org...

"Nicholas Sherlock" <N.sherlock@gmail.com> wrote in message
news:foqgik$17p$2@lust.ihug.co.nz...
Glenda and Bob Scott wrote:
I have a Sony NWD B103F MP3 player that is designed to charge its
battery through a USB computer connection.


I don't always have a computer with me when I want to use the MP3
player, so I have tried to charge the battery by simply connecting a
regulated 5 volts to the correct USB power pins (Pins 1 and 4, with no
connections to pins 2 and 3). However, this does not work with the
B103F. It seems that it is necessary to more closely simulate a USB
port, presumably with voltages (or no voltages) on the USB data pins
(Pins 2 and 3).


Does anyone know how this can be done, please?

Some devices require an actual USB handshake before they start drawing
enough power to charge - This is the USB spec. Unfortunately, that
requires a complete USB host controller in the charger. Every charger
that I've seen is just a dumb +5V supply, so some polite devices can't
be charged.

Cheers,
Nicholas Sherlock

Thank you, Nicholas, and thank you also, TT, for your informative
responses. It seems that building (or even buying) a suitable USB charger
is not a simple matter. I will just have to continue relying on a
computer to keep the B103F charged.

Regards
Bob
Did you try the DSE unit I suggested and it didn't work? I know it works
with iPods and Creative's Zen Touch.

Cheers TT
No, TT, I have not tried the DSE unit. It's quite reasonably priced and I
Click to expand...
would be quite happy to buy it, if it was certain to work. However I
suspect that it does nothing more than providing 5 Volts to USB Pins 1 and
4, which I can easily do myself. I think that my Sony B103F may be much
more fussy about its charging source than the iPods and Creative's Zen
Touch.

When I originally Googled this topic I found that someone had built a
charger by simulating a USB port with a network of resistors connected to
the USB Data pins, but this did not work for me either - in fact, after
trying this I needed to press the master reset button on the B103F to get it
working again. This fussiness about its charging source may be a good
reason for many people to avoid Sony MP3s. AFAIK Sony doesn't sell a
charger for this unit.

Thanks anyway
Bob
 
Bob wrote:
"TT" <TTencerNoSpAm@westnet.com.au> wrote in message
news:13r5snj3vjmtd8@corp.supernews.com...
"Bob" <glenbob@removethisaanet.com.au> wrote in message
news:fou6tu$haa$1@aioe.org...
"Nicholas Sherlock" <N.sherlock@gmail.com> wrote in message
news:foqgik$17p$2@lust.ihug.co.nz...
Glenda and Bob Scott wrote:
I have a Sony NWD B103F MP3 player that is designed to charge its
battery through a USB computer connection.


I don't always have a computer with me when I want to use the MP3
player, so I have tried to charge the battery by simply connecting a
regulated 5 volts to the correct USB power pins (Pins 1 and 4, with no
connections to pins 2 and 3). However, this does not work with the
B103F. It seems that it is necessary to more closely simulate a USB
port, presumably with voltages (or no voltages) on the USB data pins
(Pins 2 and 3).


Does anyone know how this can be done, please?
Some devices require an actual USB handshake before they start drawing
enough power to charge - This is the USB spec. Unfortunately, that
requires a complete USB host controller in the charger. Every charger
that I've seen is just a dumb +5V supply, so some polite devices can't
be charged.

Cheers,
Nicholas Sherlock
Thank you, Nicholas, and thank you also, TT, for your informative
responses. It seems that building (or even buying) a suitable USB charger
is not a simple matter. I will just have to continue relying on a
computer to keep the B103F charged.

Regards
Bob
Did you try the DSE unit I suggested and it didn't work? I know it works
with iPods and Creative's Zen Touch.

Cheers TT
No, TT, I have not tried the DSE unit. It's quite reasonably priced and I
would be quite happy to buy it, if it was certain to work. However I
suspect that it does nothing more than providing 5 Volts to USB Pins 1 and
4, which I can easily do myself. I think that my Sony B103F may be much
more fussy about its charging source than the iPods and Creative's Zen
Touch.

When I originally Googled this topic I found that someone had built a
charger by simulating a USB port with a network of resistors connected to
the USB Data pins, but this did not work for me either - in fact, after
trying this I needed to press the master reset button on the B103F to get it
working again. This fussiness about its charging source may be a good
reason for many people to avoid Sony MP3s. AFAIK Sony doesn't sell a
charger for this unit.

Thanks anyway
Bob
Click to expand...
Tried ebay?
 
On 14/02/2008 05:27 Bob wrote:
When I originally Googled this topic I found that someone had built a
charger by simulating a USB port with a network of resistors connected to
the USB Data pins, but this did not work for me either - in fact, after
trying this I needed to press the master reset button on the B103F to get it
working again. This fussiness about its charging source may be a good
reason for many people to avoid Sony MP3s. AFAIK Sony doesn't sell a
charger for this unit.

Thanks anyway
Bob
Click to expand...


Remember that DSE's got a 14 day period for you to return something
if it doesn't do what you want. If you've got time, you could try that
approach.


Bob
 
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