is it possible to charge a ericsson t28 with rs232 connection

[hybrid_snyper]

Hi again,

is it at all possible to implement some sort of power supply using
rs232 datacable. the circuit i am using for communication between a
pic and the t28 is similar to the one in this link http://
www.riccibitti.com/tinyplanet/tiny_article.htm. I have been unable to
find anything on rs232 supply but plenty on using USB.

thanks in advance.

 

[[email protected]]

Hi again,

is it at all possible to implement some sort of power supply using
rs232 datacable. the circuit i am using for communication between a
pic and the t28 is similar to the one in this link http://www.riccibitti.com/tinyplanet/tiny_article.htm. I have been unable to
find anything on rs232 supply but plenty on using USB.

Some sort? Yes indeed.

As much of a power supply as you need? No.

Unlike USB, RS232 does not include a power supply along side the
data. For extremely low power devices, people sometimes steal a few
milliamps of current off the data lines, including some of the status
lines that are rarely used. But you won't get enough to charge your
phone at any reasonable rate.

 

[hybrid_snyper]

Some sort? Yes indeed.

As much of a power supply as you need? No.

Unlike USB, RS232 does not include a power supply along side the
data. For extremely low power devices, people sometimes steal a few
milliamps of current off the data lines, including some of the status
lines that are rarely used. But you won't get enough to charge your
phone at any reasonable rate.

As long as the phone never needs to be recharged and can keep running
then having it charging slowly would be fine. How would i go about
stealing amps from the data line without disrupting the data?

 

[[email protected]]

As long as the phone never needs to be recharged and can keep running
then having it charging slowly would be fine. How would i go about
stealing amps from the data line without disrupting the data?

You will probably not get enough power to do any meaninful charging.

To "steal power" you would build a circuit that loads the data line,
but not too much. You may do better using the modem status and
handshaking lines, which are rarely used for their intended purpose
any more.

But it's not worth trying, as it's unlikely you would get enough power
to be of use.