Hard disk spindle motor is brushless three-phase 12-step motor, the easy way to use is to use a multimeter to measure out the common end of the 4 feet, empty, in the other 3 feet connected to the ac5v to 12v power supply, and then in the empty foot and positive electrode connected to a capacitive phase shift of about 102p, you can turn up, there is a way to go to the model store to buy brushless hall The controller, plug it in and power it up