1.Grab a computer fan from your local comp. store (any size you need).
2.Go to your local best buy, circuit city. Ask them for a replacement cord for a cordless phone base (I got one at Fredmyers in the electronic department, it had a multi plug with it). Mainly you just need a 12v plug anything with the little black box on the wall plug in side, make sure it says 12v somewhere on it.
3.Get some black electrical tape and wire cutters.
4.Next cut off the little white plug on the fan wires, so you have to bare wires.
5.Also cut the adapter off the plug wire. Not where you plug it in the wall. The side you would connect to the to the back of the phone base. Again so you have bare wires.
6.Next connect the red with the red and black with the black. One might be red or black with either red or black stripe down it, make sure you connect the right ones.
7.After you have a good connection on both wires wrap your black electrical tape around so it covers all the bare wires.
8.Plug it in and make sure it works.
9.If this dose not make sense go to youtube and type in (12V DC Evaporation Horticulture Propogation Computer Fan DIY) and watch this video.
Hope this helps GL
Josh