This post is not about Embedded Systems. But it is about a DIY project of mine. Old PC Fan to Wind Turbine.
I looked at the some old PC Fans I have and thought that they can be used as Small Wind Turbines.
The PC Fan is Brush less DC ( BLDC ) Motor. It can be converted to a generator in 5 Minutes.
The concept is simple. You can skip this part and start directly with the conversion.
The BLDC motor used here has a stator winding and a Permanent Magnet Rotor. The motor is supplied by 12V DC. But the magnetic field rotation is generated by electronics ( Electronic Commutator ) . As the name implies , the electronics components convert DC into AC which makes the magnetic filed in the stator rotate.
The electronic commutation is achieved by a small IC.
To get the induced current from the motor used a generator , you must remove this IC .
This is what I ‘ll show you how.
All what you’ll need is this tool
First remove sticker on the back of the fan.
Then you ‘ll find a small piece of plastic lock that holds Fan shaft secured , Don’t brake it. Remove it with a crocodile clip .
You can see 4 poles of winding connected in series and have only 2 terminals. To get the induced current , connect supply wires to those terminals and let the fan rotate.
With a solder iron , gently remove solder under IC pins and then remove the IC.
Remove this IC.
Now , you have the stator ready to generate current. Now install the fan.
Assemble the fan in its place and lock it with the piece of plastic I told you about.
Put back the sticker.
Connect LED terminals to the Supply wires. Don’t worry about +ve and -ve terminals , the LED will light if you connect it any way , trust me.
Roll the Fan
This video shows the fan in action.
Here is the project on instructables.com
You can read this article in Arabic