Powering internal PC fans

Does anyone know of a way to power a standard internal pc fan with an
external power supply? Are there any products out there that would make
this simple? What I am doing is I have a lot of external hardware in a
homemade case to provide portability. I have created an array of fans
in the rear of it but need a way to power them without running them
from the PCs internal supply. Any help would be great

 

[Meat Plow]

On Wed, 17 Jan 2007 14:42:38 -0800, cybermonk Has Frothed:

Does anyone know of a way to power a standard internal pc fan with an
external power supply? Are there any products out there that would make
this simple? What I am doing is I have a lot of external hardware in a
homemade case to provide portability. I have created an array of fans
in the rear of it but need a way to power them without running them
from the PCs internal supply. Any help would be great

If they're all 12 volts, add the current needed for each fan together and
buy the appropriate power supply. The current ratings are usually listed
on the fan body.

--
Pierre Salinger Memorial Hook, Line & Sinker, June 2004

COOSN-266-06-25794

 

[James Sweet]

cybermonk@gmail.com wrote:

Does anyone know of a way to power a standard internal pc fan with an
external power supply? Are there any products out there that would make
this simple? What I am doing is I have a lot of external hardware in a
homemade case to provide portability. I have created an array of fans
in the rear of it but need a way to power them without running them
from the PCs internal supply. Any help would be great

Sure, just use one of those cheap "wall wart" bricks that puts out 12vdc.

 

[GregS]

In article <SjPrh.9536$Wz.7259@trndny06>, jamessweet@hotmail.com wrote:

cybermonk@gmail.com wrote:
Does anyone know of a way to power a standard internal pc fan with an
external power supply? Are there any products out there that would make
this simple? What I am doing is I have a lot of external hardware in a
homemade case to provide portability. I have created an array of fans
in the rear of it but need a way to power them without running them
from the PCs internal supply. Any help would be great



Sure, just use one of those cheap "wall wart" bricks that puts out 12vdc.

You can buy a 12 volt regulated wall warts from jameco, just a bit more
than the unregulated model. Also small and light weight.

greg

 

[James Sweet]

UCLAN wrote:

James Sweet wrote:

Does anyone know of a way to power a standard internal pc fan with an
external power supply? Are there any products out there that would make
this simple? What I am doing is I have a lot of external hardware in a
homemade case to provide portability. I have created an array of fans
in the rear of it but need a way to power them without running them
from the PCs internal supply. Any help would be great


Sure, just use one of those cheap "wall wart" bricks that puts out 12vdc.


If it's unregulated (most are unregulated), make sure the 12v
output is at the total needed current. I had an unregulated
wall wart rated at 12v @ 500mA that I was running only at about
300 mA. The output was actually a little over 13v.

A little over 13v will be fine for PC fans, they're not terribly
sensitive and will run fine as high as 15V or so without issues.

 

[UCLAN]

James Sweet wrote:

Sure, just use one of those cheap "wall wart" bricks that puts out
12vdc.

If it's unregulated (most are unregulated), make sure the 12v
output is at the total needed current. I had an unregulated
wall wart rated at 12v @ 500mA that I was running only at about
300 mA. The output was actually a little over 13v.

A little over 13v will be fine for PC fans, they're not terribly
sensitive and will run fine as high as 15V or so without issues.

Unless noise is an issue (since they will be at a higher RPM.)

 

[UCLAN]

James Sweet wrote:

Does anyone know of a way to power a standard internal pc fan with an
external power supply? Are there any products out there that would make
this simple? What I am doing is I have a lot of external hardware in a
homemade case to provide portability. I have created an array of fans
in the rear of it but need a way to power them without running them
from the PCs internal supply. Any help would be great

Sure, just use one of those cheap "wall wart" bricks that puts out 12vdc.

If it's unregulated (most are unregulated), make sure the 12v
output is at the total needed current. I had an unregulated
wall wart rated at 12v @ 500mA that I was running only at about
300 mA. The output was actually a little over 13v.