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This is my my first instructable so please be nice, also I have already built it so I had to make the pictures on word.  

For this project you will need 
- Any old U.S.B. cord
-An old computer fan
-Wire cutters/strippers
-multimetre
-Computer to try it out on

 

Step 1: Sort Out the Cable

Get out your U.S.B. cord and find the end with the plug that would go into to device. (no the computer)  

Step 2: Cut the Wire

Cut off the plug that goes into the device and if there is a tube thing cut that off too.

Step 3: Strip the Wire

Strip 2cm off the outer coating.

Step 4: Find Positive and Negative

You might need to dig through some foil and uncover wire but you should find a few multi-colored wires.  Use your multimeter to find the positive and negative wires. 

Step 5: Tape, My Favorite Thing!

Tape down the wires that are not needed.

Step 6: Wire It Up

Connect the fan to the cord.

Step 7: Build a Base!

You can build a base out of Popsicle sticks, thick wire or any thing that can support the fan!

Step 8: YOUR DONE!

Now when you are on instructables and scorching hot you can plug in your mini fan and cool off!  
<br> If you're going to do things like this, <strong>you tell us</strong> which coloured wires you found to be the + and -. Why have people waste their time finding out for themselves when you've already learned it?<br> <br> -What is &quot;Fail tape&quot; (step 5 image note)?<br> <br> L<br>
I'm sure this has been brought up a million times, but is it really safe to run a 12V fan off of a 5V port? I can't imagine the fan runs very fast, and wouldn't it possibly burn out the port/whole computer?
Safe? yes.<br>Burn out USB? not unless something goes horribly horribly wrong.<br><br>You're feeding the fan 5 volt, at 100mA max.<br> If it will start on that voltage, it should run no problem.<br><br>MOST 12 volt fans I have worked with need closer to 7 volt to start, and will continue to running on as little as 3 volt, once moving.<br>SMaller case fans, cpu cooler fans, laptop fans, etc... they often will start on lower voltages.<br><br>Running on 5V WILL cause the fan to run much slower, but if all you want is a gentle breeze, then it might be fine.<br><br><br>http://www.techpowerup.com/articles/other/137 <br>While the article I linked deals with molex powered fans... the principal is the same. The major difference is, a molex connector can usually source a LOT more than 100mA available to a standard usb port(note: 100mA is WITHOUT the usb handshake/shorted wire trick needed to bring the 500mA power for use)
Alright your information looks to be all in order...<br><br>That's actually the first time I've gotten a detailed answer. Thanks!
its a good instructable, but--<br>real pictures are always better than pictures drawn in mspaint.<br>some people prefer visual references to what theyre doing rather than digital references.<br><br>not speading hate or anything, but its a suggestion for your future instructables.

About This Instructable

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Bio: I am a Canadian boy that likes to make, invent, and tape things. my current project is a chocolate 3D printer. :-)
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