Here in this video you will see how to make a USB fan using CD at home. Process:- 1) Take USB Cable and open its upper cover you will find 4 colors of wire (Red, Black, Green and White) you will need only 2 of them Red and Black wire so simple remove others. 2)
Take Small moter and joint the the USB wire Red at + side and Black at - side 3) Take 1 CD and heat it with candle flame when you feel CD is soft start cutting the disk like fan wings and make 8 to 9 wings 4)
Now take 1 more CD and put the marker in CD middle and joint it with magic or Elfy it will work like stand and then take the Moter and joint it at top of Marker with magic glue or Elfy with help of tape bind. (Wait until all joints are dry and strong) 5) Take upper cap of marker or cork and put it in the middle of CD of
step 3 for fan wings and make small hole in cape at back side so that Small moter inserted here. 6) Finally attach the step 5 CD with stand you created at step 4 wait until all joints are strong and put the CD cable in USB Port enjoy the cool air of USB Fan.