Can I run a fan controller of a 12V AC adapter?

[Hampern]

Hi like the title states, would it work?
I have a 12V AC adapter that I have spliced the wires on, and I'm thinking if i could power this one (and 2 fans)
http://www.zalman.com/eng/product/Product_Read.php?Idx=206 with it.
Thanks!

 

[popatim]

No
pc fans are 12v DC not AC.

 

[Hampern]

No
pc fans are 12v DC not AC.

The thing is, my pc fans still run at full speed when i connect them to this adapter?

 

[Cristi72]

Hello,

By using a fan controller, you will never make that fan to spin again at its maximum speed because of the voltage drop. The difference will be minimal though (max. 5%, 1900RPM vs 2000RPM for example).

MIND YOU: As popatim said, your adapter WILL NOT WORK in this state and you'll have a very good chance to damage the fan and the controller. To convert AC to DC on that adapter you must add a rectifier diode, a capacitor and a 12V stabilizer.