USB Fan Out of Old Computer Fan

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Introduction: USB Fan Out of Old Computer Fan

In this instructable I took a USB cable and a old computer fan and made the fan USB compatable.

Step 1: Getting the Usb.

Cut the USB cable to the desired length. Then Strip the cable so you see 4 wires. Cut or isolate the green and white wires. Now strip the red and black wires.

Step 2: Connecting the USB to the Fan.

Twist the red wires with each other and the black wires with each other. Now your done, plug in and be cooled down.

8 People Made This Project!

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72 Comments

This is great because i have a laptop that doesn't have a fan built-in, and it gets pretty hot while using it. Great solution!!

3 replies

You can also make a free energy fan so you don't need to use power source at all magnets at the ends of the blades and to magnets diagonal of each other to make it spin without energy. a push and pull effect. Although great idea. Will try in free energy fan to charge phone, might need transformer...

I must inform you that your solution with magnets violates conservation of energy, and will not work. The fan blades will keep spinning for a short while, but not forever.

True. Energy cannot be created or destroyed, only transferred so the energy in this case is being used to move air, so the fan WILL stop unless you put it in space, where it will spin forever until it hits something.

I USED POWER SUPPLY INSTEAD OF USB CABLE OR CHARGER IT GIVE AIR LIKE AC IT WORK ON 220-250 VOLTS

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2 replies

This idea occurred to me as well but Power Supplies pump out a lot of heat, my budget for AC would not like that. Now if the PS was outside.... move it in in the winter.....hum.

This is what I said down below except intended for you.

You can also make a free energy fan so you don't need to use power source at all magnets at the ends of the blades and to magnets diagonal of each other to make it spin without energy. a push and pull effect. Although great idea. Will try in free energy fan to charge phone, might need transformer...

mine doesnt work :( I have on my USB wires Red, green, yellow & white and on the fan i have black,red &yellow.; What can i do to make them work? thanks Paul

2 replies

This is extremly late but what you would do is link the 2 red wires, and link the link the black and white wires.

lol just a bit late hahahaha

Does the charger size matter? Mine is kinda small. Its flat and wide

I have an 5v fan, just perfect, thanks

Thinking of using this idea for an air filter. Already have the carbon filters ordered and am working on the housing. I'll let you know how that works. Heck may write my first instructable.

Thanks. This is exactly what I was looking for. I have an old liquid cooling cpu unit that I used to make a makeshift airconditioning coil to put in front of a fan. the unit is 4 pin and i wanted to power it with the computer via usb so it can pump the liquid through my coil.

I don't feel like taking a picture, but I made it! It's actually pretty nice for cooling off my hand as I use my computer because one of the corners gets hot.

Thanks for the idea I'm gonna splice an old pc speaker power supply that plugs in to the wall and attach the fan to it so the fan will get the 8 volts it needs!!!

I made a real good fan out of an airsoft machine gun and its wicked. I hooked up two nine volt batteries and its amazing. i even made my own blades out of card board box.

Héhe, nice during these hot days! thanks for the idea :D

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