USB Mini Fan

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Introduction: USB Mini Fan

About: Now I am a retired person, who enjoys life and making small things to pass the time keep myself busy.


This Mini Fan as been made out of a broken toy car's DC Motor. It works very well and is good to use it when you are working on your PC. The speed of the Motor is good and it does not heat up because of the 470pF capacitor used.
The tilt of the Fan blades determines the amount of air flow.
The Fan Blades is tilted at an angle of 45 degrees.

Step 1: Parts of the Fan


To make the stand of the Fan I have used the following items.
A piece of PVC cut out of a face powder container to make the fan blade.
A small PVC Box with weight inside to make the Base of the Stand.
A metal door handle is used to increase the height of the stand.
Attached to it is a wooden batten with Mortise Tenon joint to facilitate the movement of UP of Down.
Two pairs of Nut and bolt.
A thin PVC sheet to hold the Motor in place.
Two thumb nails to keep the Electrical wire in place.
Four tin screws are used fix the door handle and the wooden batten.

Step 2: Front View


This is the FRONT VIEW.
The total height is 9.5 inches or 24 cms.
To make the Fan BLADES take a piece of thin PVC sheet and draw the outline of the Blades.
Cut out the Blade with a hole in the center.
Dip one side in boiling water and twist it clockwise.
Do the same to the other side.
The FAN BLADE is ready.

Step 3: Back View

This is the back side view of the Fan.
Here you can see that a 470pF capacitor has been used and connected to the two terminals of the Motor.
Thumb Nails has been used to keep the wires in place.

Step 4: Side View


In this Side view you can see the twist of the fan blades.
The Fan is complete and ready for use.

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    18 Discussions

    reverse it and it becomes a genarator

    It eliminates AC ripples. It helps it to run the motor properly and efficiently.

    just a note to all of you. USB is DC. so there so no need to worry about an ripple

    PVC sheet for making the fan blades can be cut out of any PVC container such as Coke bottle, Talc powder container, Lubricating oil bottle, which has a flat surface, or it can be made flat by applying a little heat.

    I would like to suggest that you put a diode between the motor leads like you did the capacitor. This will protect your USB port from blowing up from a sudden surge of power when the fan is stalled or turned off.

    1 reply

    Hi rimar your suggestion is good but I feel that my small Motor may not be able to take the load of a big Propeller. Thanks.

    That propeller is fully scalable, you can do it using a little collyrium plastic bottle, in example. Because it have little turbulence, it needs less power to give same output.