Motor winding judgment circuit

(1) In-phase winding judgment: Connect two batteries in series, then
connect one pole of the light-emitting diode according to polarity, the other pole is connected to any tap of the motor, and the remaining
taps are in contact with the other pole of the battery. Touch, the light-emitting diode is the same-phase winding.
  (2) Determine the beginning and end of the winding: first connect one end of any two-phase winding of the motor
, and connect the other two ends to the two poles of the light-emitting diode. Connect one end of the remaining phase winding to the negative pole of the battery
, and the other end to the other end of the battery. Electrode touch. At the moment of switching on, if
the LED lights up, then the positive electrode of the battery, the negative electrode of the LED,
the other end of the winding to which the positive electrode of the LED is connected, and the first or last end of the winding are all identified at once. If it does not light up, you can
change the battery electrode or winding connector and try again. If the LED does not
light up no matter how you change the connections, you should check the battery, LED and each connector until it lights up.