Introduction: How to Make a Simple Portable Fan
In this Instructable I will show you how to make a simple portable fan. Warning before taking apart the computer power supply you must unplug the power supply or else you could be really painfully shocked or even killed just from touching one of those silver plates which are heat sinks I learned that first hand but luckily I wasn't killed. You should also use a grounding wrist band with a built in resistor and make sure you keep your hands and tools away from the big black things, they are capacitors which can still hold a charge of about 200 volts at 5 amps which can easily injury or even kill you!! I am not responsible if you get injured or killed. But you can easily overcome this by using a different fan from inside your computer.
Step 1: Getting the Materials
Here is a list of things you need to make the fan:
One computer power supply or one computer fan (if you are using a computer fan then skip steps 2 and 3 )
Eight AA batteries
One battery holder for eight AA batteries
Tools:
One Phillips screwdriver
Side-cutters
Masking tape
Step 2: Take Apart the Computer Power Supply
First remove the four screws on top of the power supply. Then lift the cover off of the power supply.
Step 3: Remove the Fan From the Computer Power Supply
Cut the two red and black wires with the side-cutters then remove all four of the screws that are labeled in the second photo. After that take out the fan then go onto the next step.
Step 4: Build the Portable Fan
Now you have to put the batteries in the holder. After that is done you tape the fan to the battery holder.
Connect the wires as shown in the fourth photo then test it out and you're done. If you have any questions about this build please feel free to ask and don't forget to vote for me for the "Dead Computer Contest".

Participated in the
Dead Computer Contest
13 Comments
7 years ago on Step 4
Might be a good idea to mention staying away from the caps in the power supply. Safety first.
10 years ago on Step 4
do you need 8 batteries?
10 years ago on Introduction
or 1 A (23A) battery. they are 12 volts.
10 years ago on Introduction
You DO NOT want to wear a grounding wrist band while working with a PSU. Wearing the wrist band will pass a high voltage charge through your body. You do not want that! While working with high voltage sources dont use a wristband and try use only one hand if your removing a component or w/e. Using two hands will complete a circuit, passing voltage through your body.
Reply 10 years ago on Introduction
I mend a grounding wrist band with a built in resistor so it decreases the amps. Remember volts wont kill you but Amps will!!!
Reply 10 years ago on Introduction
Still Safty First LOL
11 years ago on Introduction
Clear instructable!
Reply 10 years ago on Introduction
Thanks and this was the first Instructable I had ever made.
10 years ago on Step 4
AWESOME!!! This is great!!! thanks!!
Cant you use computer power supply and make it run like a portable fan? What holds 8 batteries or more now a days? how long does it run for?
Reply 10 years ago on Introduction
I'm glad you like it. It would be very hard to make a computer power supply portable because the computer power supply runs on 110 volts. You can get a battery holder that holds 8 batteries from The Source or Radioshack.
10 years ago on Introduction
This is fantastic, I had a dead power supply laying around for a year, now I can finally put the fan to use.
11 years ago on Introduction
Good work!!
Cheap, eco-friendly and useful...
Reply 11 years ago on Introduction
Thanks!! I'm glad you like it.