How to determine the positive and negative wires of a micro DC motor?

To distinguish the positive and negative wires of a micro DC motor, you can use the following methods:

Observe the wire end markings: Many micro DC motors will use red and black to mark the positive and negative poles respectively. You can directly observe the wire end markings to distinguish the positive and negative poles.

Observe the junction box: Some micro DC motors will use different colors or symbols to mark the positive and negative poles in the junction box. You can directly observe the junction box to distinguish the positive and negative poles.

Use a multimeter: Use the voltage range of the multimeter to measure the voltage between the positive and negative poles of the motor and the positive and negative poles of the power supply. If the end with a higher voltage value is measured, it is the positive pole, and the end with a lower voltage value is the negative pole.

Observe the speed and direction: When the motor is working normally, the end with a higher speed is the positive pole and the direction is clockwise; the end with a lower speed is the negative pole and the direction is counterclockwise.