About Stepper
 A stepping motor is a DC brushless electric motor that divides a full rotation into a number of equal steps. 
					 Single phase / 2 phases/ 3 phases / 4 phases / 5 phases 
					 PM : Permanent magnet / VR : Variable resistance / HB: Hybrid 
					 No, stepping motor needs a driver with pulse train input to achieve rotation and precise positioning. 
					 
