Electronics Question.

Permabanned
Joined
6 Aug 2010
Posts
941
Location
Ashbourne, Derbyshire
I have a fan that is 12v and draws 0.48A, I have calculated this to be 25Ohms resistance,

What I can't work out is what size resistor I would need to reduce it to half speed.

Can anyone help ?
 
OK, lets make it more insteresting then.

Lets say I had 5 of these fans that were controlled by the onboard monitoring software and didn't run at full pace normally.
Add to that 2 x fans that draw 1.2A as well


Given the above situation, what rating of potentiometer would you buy to slow these fans down, (In fairness I probably don't want them at half speed just probably UP to half speed so that I can have a play around with the noise/temperature levels.)
 
Back
Top Bottom