DV Hardware - bringing you the hottest news about processors, graphics cards, Intel, AMD, NVIDIA, hardware and technology!

   Home | News Archives | Reviews | Articles | Howto's
DarkVision Hardware - Daily tech news
November 24, 2020 
Main Menu
News archives

Who's Online
There are currently 164 people online.


Latest Reviews
Ewin Racing Flash gaming chair
Arctic BioniX F120 and F140 fans
Jaybird Freedom 2 wireless sport headphones
Ewin Racing Champion gaming chair
Zowie P-TF Rough mousepad
Zowie FK mouse
BitFenix Ronin case
Ozone Rage ST headset

Follow us

Howto : Make a 7/12V fan switch


Article by : SpotTheCat
I made this, it's better than a rheostat/baybus because those produce heat, cost more money, and can't handle big fans. I went to my hardware store and bought a 3way lightswitch for $1.20, cut a hole in a 5.25" bay, and mounted it. The wiring is slightly complex, Here's how I made it :

Yellow - always +12V
Black - either ground or +5V, depending on switch position
Black - always ground
Red - always +5V

Here are some pics I whipped up, click on the image for a bigger picture

How it works: when the switch has the negative fan lead at ground, the total voltage is 12-0=12V when the negative fan lead is at +5 you get a resultant of 12-5=7V

You can have fans always 7 or always 12 by moving the pins on the molex connecters to the always 5 or always ground leads

Thanks go out to SpotTheCat for providing us with this howto and pictures!

[ Back to Howtos ]


DV Hardware - Privacy statement
All logos and trademarks are property of their respective owner.
The comments are property of their posters, all the rest © 2002-2020 DM Media Group bvba