Re: reducing 12V+ source voltage with a potentiometer
- From: Luhan Monat <x@xxx>
- Date: Tue, 19 Apr 2005 09:52:14 -0700
Joseph wrote:
I would like to reduce the 12V+ source voltage going into computer fans with potentiometers place between the 12V+ and the fan. I am unsure what Ohm rating potentiometer I need to get could someone please help.
All I remember from physics class was that V=IR formula. So I guess that means R=V/I = 12/I The fan has a label that says 0.8A on it. So I guess that means R=12/0.8 = 15 Ohms max ? Kinda small? I only have on hand a potentiometer that say 15K ohm.
Could someone please share me their experience using pots to dynamically reduce a 12V source voltage.
Cheap and dirty. Put a 12vlot lamp in series with the motor. For faster motor speeds, use higher current lamps. Moundt a 1-hole mounted lamp holder on the back of the machine for easy lamp changes. Also provides some light back there when switching cables and such.
-- Luhan Monat (luhanis 'at' yahoo 'dot' com) "The future is not what it used to be..." http://members.cox.net/berniekm .
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