Reversed Fans

Ok, n00b question..
Can the direction fans spin be reversed?
The terminals are exposed where 2 wires (1 pos + ground)
attach to each fan on cheap laptop cooler I got.
Soldering the wires changing (+) to (-) and (-) to (+) going to the fan.
Now the fans won't spin, what else needs to be changed or is it possible?
thanks

 

If the fan spins backwards, you're blowing hot air right into the computer/cpu/gpu. Not a smart idea.

 

The fans use DC (Direct Current) and likely their motors are only designed for a single direction of rotation.

No way to make them spin backwards and goes against the idea of what they are supposed to do anyways as you will be sucking air away from the base of the laptop which has enough problems getting air already due to space constraints.

 

I asked for an answer not your opinion...
Just wanted to know if dc fans (in general) can be reversed by
switching the terminals.

It would lower my c90 temps bringing cool air in
from the front and blowing into the large intake vent.
I tested with 60x60x10mm fan blowing air into the intake
and temps dropped significantly
Kind of like ram air... er whatever

 

Where in that, did you think I was expressing an opinion?

Your question was:

I gave an eloquent answer and reason for "no". An opinion would be: I think your fan looks cool.

 

Ah, intake is on the side rather than the bottom. In that case laptop cooling pads are just about pointless for you

 

vents are on both left and right side with the main intake being in the middle front below the touchpad on underside.
http://i15.photobucket.com/albums/a396/alexvand/Pure Pwnage/asus_c90_hddvent.jpg
the other side vent is built into the case.
I said bringing air from the front blowing into the largest intake helps.
Pulling air away from the bottom goes against the air flow design.
Cool air comes in from the sides and middle front to 4x fans and heatsink sticking out the back.

 

If they can be reversed, it will also be impossible to mount it back to the CPU/GPU as they are designed for a single side fitting.

 

It sounds to me like he has a cheap laptop cooler that pulls air away from, instead of pushes it toward the laptop, and he wants to reverse the laptop cooler fans, not the fans in his actual laptop.

But I may be wrong.

 

no, you can't reverse the wires to reverse the direction of the motor..

 

you typo'd, right?

 

opps yes i did sorry...post edited

 

ok, didn't think so..
I will run a case fan under the front intake
powered by usb if 5v fan or wall power if needed (12v).
I think the c90 performance/look is awesome,
but it gets too hot. What I mean is heat
does not cause problems now, but may reduce life of components.
The new design allows for easy upgrade installs though.

 

I have no idea how theses fans work, but I do remember building an electric race car for physics class. I remember the engine spinning a different way if you changed the magnets around. I don't think changing the wires would change the magnets though.

 

no, it doesnt. Some can but most consumer available ones will not (in the range of 95% likely).

valex - Wall power will be ~110v AC (or 220-250v AC in some other countries...) unless you use an adaptor.