Dual PCI slot fans with adjustable speed.

This is how I made a pci slot fan with dual 80 mm fans, and an expansion slot controller for it.
Warning: it is possible that you might make a bad connection, and short out your computer's power supply. I recommend that you test this with a separate 12 volt power supply multiple times as you proceed, to make sure it is working at every step.

Step 1 Material

Here's what you will need:

2 identical or very similar 80 mm fans
3 computer expansion slot covers
lots of electrical tape
2 machine screws and their corresponding nuts
old cd drive
5000 ohm rheostat (variable resistor)
on/off switch
insulated electrical wire

Tools:

drill
1/8 inch bit
3/8 inch bit
soldering iron
solder
12 volt power supply (for testing)
alligator jumpers (for testing)
hot glue gun
wire strippers
pliers

I already had all these parts, so this cost me a big old zero dollars, but if you had to buy everything except a cd drive, this would probably cost you 20 bucks or so.

Comments

[ondrikczech]

great!nice idea

[zack247]

cool! but how do you keep your case so neat?
i have filled all my pci slots (two taken up because drivers wouldn't install lol)
I have wires running all around my case, yet yours is so perfect!

great 'ible, 5*s

[Technochicken]

Because my PSU was modular. I currently have a different case and power supply, which is not modular, but I just stuffed all the extra cables behind the HDD rack.

[Yerboogieman]

I like this, pretty clean.

[jacob5680]

 If  you have the screws for your fan and a DVD cover, you can cut pieces off from the cover, punch holes, and use four pieces and 8 screws to bind the two fans. Any other plastic, ( or thin metal ) should work just as well. ( if you have a drill )

[PyroMonger]

I have no need for this because I use my laptop all the time and I know my dad won't dare let me touch the pc or I might get carried away with mods lol. Overall I just love the quality of you instructables both in build and instructions. Keep it up!

[gurtek]

Nice......................

[alex-sharetskiy]

rheostat can burn out

[rimar2000]

Very good job. A little help with step 3: If you stretch the tape to the end, it will unstick and its end will lift. Must be left loose, not tight, the last half lap. Pardon my Google Translator English.

[Technochicken]

Yes, you're right, ill fix that.

[cyrozap]

Wow. That's pretty cool. I might try it.