1. Introduction to the five wires of brushless DC geared motor

1.1 Positive power wire (+5V): This wire provides the working voltage for the motor. It is usually red in color and is used to control the transmission of signals to ensure the normal operation of the motor.

1.2 Power supply negative wire(-5V) or ground wire (GND): As the reference point of the circuit, all signal wires and power wires will be connected to this wire to protect the circuit and other wires from electric shock. Usually the color is black or brown .

1.3 Signal wires (yellow wire and blue wire): These two wires together form a two-way signal, which is used to improve the accuracy and stability of control. They are related to the number of revolutions of the rotor, and the voltage changes in the opposite direction, providing a signal of the motor speed to the controller.

1.4 Hall sensor power wires (+5V and GND): These wires provide power to the Hall sensor and ensure the sensor is working properly. Usually the thin red wire is the +5V power supply and the thin black wire is the ground wire.

2. The purpose of the five wires of the brushless DC geared motor

2.1  Generator wires

The function of the three generator wires is to output the power of the motor, which is the most basic function of the BLDC motor with gearbox. The motor converts direct current into rotational force through internal electronic components, and at the same time drives the device to complete the work. The three generator wires include one positive wire and two negative wires. The positive wire is connected to the positive pole of the motor, and the two negative wires are connected to the two negative poles of the motor.

2.2 Sensor wires

The purpose of the two sensor wires is to transmit the position and speed information of the motor. These two wires can identify the position and speed of the motor and then control the operating status of the motor. According to the kinematic principle of the motor, the output position and speed of the motor are closely related to the input control signal. The three generator wires and two sensor wires work together to achieve accurate motion control.