Speaker Power Bracket For PC

[CW]

Greetings! I'd like to power my external PC speakers with my computer
instead of using the bulky AC wall transformer/adapter that they were
shipped with. The wall adapter is rated for +9VDC @ 1A. When I measured the
output with a DMM, I get +12.5 Volts, so I presume the voltage goes way down
once it is loaded. So, what I'd like to do is drill out a card slot blank,
put in a cheap coaxial plug and wire that to one of the +12VDC PS connectors
in my PC. What I don't know is whether or not my amplified speakers can take
the somewhat regulated +12VDC. I really don't want to put a 3 Ohm, 3 Watt
resistor in series with the speakers, and would prefer not to have to build
up a DC to DC regulator circuit (i.e. LM317T). What I guess I'm looking for
is whether or not someone has already done this, and what the results were.
Anyone?

 

[henny]

Being lazy I used a 8.2V 10 Watt Zenier and the 3? resistor.

I used the LM317T for a digital camera. A real pain in the neck.

Henny

 

[Spajky]

I'd like to power my external PC speakers with my computer
instead of using the bulky AC wall transformer/adapter that they were
shipped with.

. What I guess I'm looking for
is whether or not someone has already done this, and what the results were.

IMHO, you could do that w/o problem . ..
time ago here in my country a small firm was producing an PC amp
fitting in the 5,25" PC bay ...

 

[Stef]

Greetings! I'd like to power my external PC speakers with my computer
instead of using the bulky AC wall transformer/adapter that they were
shipped with. The wall adapter is rated for +9VDC @ 1A. When I measured the
output with a DMM, I get +12.5 Volts, so I presume the voltage goes way down
once it is loaded. So, what I'd like to do is drill out a card slot blank,
put in a cheap coaxial plug and wire that to one of the +12VDC PS connectors
in my PC. What I don't know is whether or not my amplified speakers can take
the somewhat regulated +12VDC. I really don't want to put a 3 Ohm, 3 Watt
resistor in series with the speakers, and would prefer not to have to build
up a DC to DC regulator circuit (i.e. LM317T). What I guess I'm looking for
is whether or not someone has already done this, and what the results were.
Anyone?

http://www.bit-tech.net/article/76/

Might be of interest?