Wind Generator From Old Scanner [updated]




I'll show you how to recycle an old scanner into an amazing wind generator.
You need it, clean energy!

Step 1: What You Need?

What you need:

- Old scanner
- Rectifier diodes (I used 8 1N4007)
- 1000uF Capacity
- LM7805 (voltage regulator for 5 volts)
- PVC pipe (for blades)
- Plastic square (for tail)
- Aluminum pieces (i used alumynum, but you can use what you want)

Step 2: Recycle Old Scanner

Those scanners should have a mini fluorescent tube that can be still used in your projects, some electronic parts and the most important thing, a good stepper motor.

In my case i got a 4-phase stepper motor :)

Step 3: Building the Rectifier Circuit

Since stepper motors generate alternate voltage you need to rectify it. Each phase must be rectified with 2 diodes, this is, 8 diodes.

The output of the rectifiers will be stabilized with a 1000uF capacity and a 5v voltage regulator (LM7805 in my case).

Attach some connectors to allow charging different gadgets. I added a female USB connector since my phone and mp3 use USB to charge.

Note 1: this motor can generate easily more than 5V, but i only need 5V by the way.

Note 2: there is an issue with the USB female connector. You need to follow the USB specifications in order to make it work. USB2 charging needs two 15KOhm resistances on the data buses to work properly. Check comments on this instructable for more info: USB charger

Note 3: I used this free software for circuit simulation: QUCS
It lacks of some components right now, but it's great after all.

Still can't get usb charging on my phone. My mp3 charge ok, i think it's USB1.

Step 4: Build the Blades

I made the blades using the Chispito instructable.

Check it now!

Step 5: Build the Structure

I don't have plans of the structure, since I thought it while cutting it :)
Take my photo as help.

I must rebuild the rudder, since it's too small.
I'll post pics of a new one soon

Step 6: End!

That's all. As final step, you can make a nice circuit and make some adjustments to structure/blades to give your personal touch.

Try it on a windy day and charge your phone/mp3/ipod for free :)

Note: i don't have any photos since those days there is no wind, but I promise uploading a few more.



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    98 Discussions


    Reply 4 years ago on Step 3

    You mean he put capacitor rated for 5V before regulator, while he also claims that source can provide more than 5V?


    8 years ago on Step 4

    yo which pulley should i get and are there metal ones??? and do i need to remove the pinion gear and how.


    Reply 8 years ago on Introduction

    Hi there.
    Can you tell me what part it is u used for making your turbine pivot.
    There are some bearings in it i see.
    Greetings from Belgium


    10 years ago on Step 2

    sorry i keep commenting but is your stepping motor MITSUMI M42SP-4NK LOT NO.T G 6117 if so i af the exact same motor as you is it from lexmark?

    1 reply

    Reply 9 years ago on Step 2

    The make and model of motor shouldn't make a difference, provided that it's a stepper motor, which is rated to have approximately the same output. What it comes out of is irrelevant.


    9 years ago on Introduction

     I have made one with a PM55L-048 Stepper Motor took from an old HP Deskjet printer. But I need a rectifier circuit for my stepper because it is a unipolar I think with 5 wires coming out from it. Please Help! Thanks.


    9 years ago on Step 6

     hey neat instructable.  i have been trying to think of something of this size as well.. any chance you could update with more info on the range of output your turbine can supply? cheers.

    electronic boy

    9 years ago on Step 4

    how in gods name did you get that fiddly gear off of the end of the stepper motor

    electronic boy

    9 years ago on Step 3

    if you want to light a bulb then your best bet is to put a charging circuit and a battery so your light dose not flicker if there is no wind

    Is this metal or plastic? I found the plastic one to break very easily, it would only take a light wind. This one is made of the same plastic all the new meccano kits come with, it chipped away and is cheap enough that I would not reccomend its use.

    A3 windgen.JPG

    10 years ago on Introduction

    could you use a zeiner diode to by-pass the 7805 when the voltage is under 5 volts?