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.