The feedback for brushless motors is done by the use of Hall sensors when rotating the brushless motors in the stator windings need to be energized sequentially. The controller needs to know the rotor position in order to understand the next winding to be energized following the correct energizing sequence. The rotor position is sensed by the Hall sensors embedded in the back end cap of the brushless motors housing. The brushless motors utilize three Hall sensors. They are separated by either 60� or 120�. The Hall sensors sense either the rotor magnet or an external magnet placed on the back and shaft. They give a digital signal signifying whether or not a north or South Pole has passed the censors using the signals from these sensors the brushless motor controller can easily maintain the brushless motor velocity. The Hall sensors are normally mounted on a PC board and fixed to the back end cap on the non-driving end of the brushless motors