> what is the torque for a normal desktop fan? Is such a
> potentiometer (with
> that level of torque) available?

Are you sure you want to use a potmeter? If you want to detect/measure
the turning of a fan a optical or magnetical sensor might be better
(think of the speed/distance etc gimmics for a bike, or the rotation
sensor of a floppy).

Wouter van Ooijen

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