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Fans
Posted: Sat Mar 22, 2014 7:24 am
by 35mastr
I was walking through Frys Electronics and was looking at some fans. I noticed a lot of the 12 volt fans have 3-4 wires coming out of the motor. What are all these extra wires for? 12 volt is just 2 wire????
Re: Fans
Posted: Sat Mar 22, 2014 7:53 am
by The KYChemist
Third and fourth wires are usually for temp controlled on and off settings. At least, that's what my research led me to believe, when I was researching fans for my controller. You still just use the red and black wires.
Re: Fans
Posted: Sat Mar 22, 2014 8:08 am
by Litebread
A lot of DC muffin fans have a built in tachometer.
-Litebread
Re: Fans
Posted: Sat Mar 22, 2014 7:01 pm
by Od1tspyd3r
My research shows the same, and working in iT I have lots of old servers and pcs floating around, so I came up with the following contraption, 4 12v 50 cfm fans wired up to 12v 1 amp power supply from a dead router, pulls 200 cfm combined. [attachment=-1]uploadfromtaptalk1395542661874.jpg[/attachment][attachment=-1]uploadfromtaptalk1395543518818.jpg[/attachment]
They are all hooked up to 2 " dbl sanitary tee