I want to make two switches for my fan (I only have one),
one switch for enabling low fan rotation,
second for enabling max fan rotation,
the way that if I have enabled low fan rotation computer can enable max speed...
What should I do to what wires?

 

as far as I know the fans on these only have one speed(high)there is no easy way I know of to make them turn slower other than putting some kind of voltage dropping device.With the current these fans use that would not be an easy task.you would have to use some kind of voltage dropping resistor and it would be fairly huge and generate massive amounts of heat.you might as well just run it on high by the time you are done with all that.

 

Thats what I tough. Thx very much