Originally Posted by tmd49
This is my problem; the pot is either off or on, no variable resistance. Should I get a bigger/stronger pot? I hae a 6v DC power supply with a 12v fan.
Try an LM317 or check out flomasters post below.
Originally Posted by Flomaster
so after reading the other 200 page DIY thread about using an old computer fan, hard drive magnets, radio shack potentiometer and a random power supply I attempted to build my own. after many a failed attempts and finally getting a working combination using a 18V JBL power supply I found it was spinning to fast for my liking even on the slowest setting.
I saw another thread about this usb fan on amazon.com and said WTF might as well try it out. well let me tell you this works fantastic and is super easy to put together.http://youtu.be/f9Oij-NCWds
here is a link Video Link: http://www.amazon.com/Thermaltake-Mobile-Fan-External-Cooling/dp/B00080G0BK
to my fan its an 80mm fan I didn't think I needed to spend the extra coin on the 120mm fan.