26-05-2012, 09:08 PM
Right, i'm going to be installing just the one slim fan connected to a manual switch for the hot days. What I want to know is.. is there an easy way of installing a variable speed switch in the dash to adjust fan speed, a bit like a light dimmer?
If I wired one up in series with the fan, the obvious answer would be a variable resistor to drop the voltage at the fan. Would this cause the fan to stop working if it's a single speed fan relying on 12v? What if the variable resistor was wired in parallel to the fan?
Need to look into this as I want the option of leaving it spinning up slowly for security given the weather we're having.
If I wired one up in series with the fan, the obvious answer would be a variable resistor to drop the voltage at the fan. Would this cause the fan to stop working if it's a single speed fan relying on 12v? What if the variable resistor was wired in parallel to the fan?
Need to look into this as I want the option of leaving it spinning up slowly for security given the weather we're having.
![[Image: signature_zps1a02ba79.jpg]](http://s1128.photobucket.com/user/martypellowe/media/signature_zps1a02ba79.jpg.html)