Really, REALLY Easy USB Motor!




I like electronics, blowing stuff up, fun and reading. If you have anything cool, please email me!

Intro: Really, REALLY Easy USB Motor!

At long last, my 2nd instructable!!!

This is fan for you or your computer that runs off any avalable USB port. I reccomend it for beginners into electronics, right up to the pro's.

It is easy and fun, you can make in literally five minites!!!

Step 1: Parts and Stuff

First you'll need to find the parts and stuff.Basicly, you'l need:

1 3-9v motor with blades (out of mini fan) (pictured below (without blades)

1 USB cable (can be ANY of the three types shown below, as long as it has the same wire layout

Some (tiny amount) solder

Switch (optional)

Nescessary tools (wire stripper/cutter, soldering iron, tape)

Step 2: The Building

The buildig part is really simple.

First, cut the cable at the non-male end( its usually square or smll). Then strip the USB cable and solder thee RED and BLACK wires to their respective contacts on the motor (experiment to see which way makes the prop will push the air FORWARD)

If you're adding a switch, you might need to solder some extra wire depending on where you want it to go, but I didnt 'cause its more practical to use the plug as a switch).

Then Isolate the ramaining wires, tape it up and you're ready to go!

Step 3: You're Done!!! YAY!!!

Now Enjoy you're fan on hot summer's day!. You could also use it for cooling componants in a seriously overclocked computer.

I did'nt bother isolating the other wires. bad choice. Now if you sxueeze the tape around the contacts herd enough, you have a speed setting cause its shorting out!! YAY!!!

This design is highly customisable. You can add s rigid bar along the wire to give it a flexible stand, or add other componants to it as welll if you wand to get really technical.

Since I used a 3-Volt motor, and the Computer's Output is 9 Volts, My motor goes spaz. If you did the same, I wouldnt reccomend leaving it on for too long for risk of blowing the motor/ power supply. Alternativley, add a resistor to suit you're needs.

As PKM said, you could add a variable resistor off a radio or something, and for all you safety freaks out there you could even soulder up a PCB with resistor, fuse and protection diode!


Look, i really dont care about my computer anywas, its a piece of 3-year-old custom sh1t. It has a single core CPU, 1GB of ram and absolutley no physics processing capabilities. I mean, I cant get Phun (physics sandbox) to run past 1 FPS. Im serious!!! My halo games dont run too bad on it though.

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    98 Discussions


    9 years ago on Introduction

    I am not an electrical engineer,yet this will work. What I am not sure of is the effect on the internal circuitry without voltages being a constant.So in essence, it works, but prolonged usage may have consequences,( unless there is an engineer that can reiterate on this). My modem was overheating, so I placed a USB fan next to it and it works great! Your homemade version is the same thing, except I know that my fan was engineered for this purpose. See attached photo:


    Reply 10 years ago on Introduction

    Sry, my multimetre is screwed up from the cattle prod tazer expirement i did.


    Reply 10 years ago on Introduction

    ha, same. i tried to measure the voltage on a piezo electric sparker... didn't end so well for my $10 multimeter.


    Reply 9 years ago on Introduction

    lol XD i'l tell you its about a million volts at an extremely low current


    Reply 9 years ago on Step 3

    I should put a couple billion in parallel and see if my step brother likes it then...


    Reply 9 years ago on Introduction

    umm, if i remember correctly, it's several thousand, and an almost immeasurably low amperage.


    Reply 9 years ago on Introduction

    Yeah, but 5v is in the 3-9 range isn't it? I'm sure it goes like 3 4 5 6 7 8 9 not just 9.