12V 300rpm TT Motor with Hall Encoder for Arduino Raspberry Pi 3-6V Dual Shaft Geared BOX DC Electric Motor DIY STEM Toy Parts

Definition of terminal pins

Note: The voltage between V-G is determined by the power supply voltage of the microcontroller used, usually using 3.3V or 5V

2. The frequency of H1 and H2 output square waves is related to the motor speed and the number of opposite poles of the magnetic plate used

3. The voltage between M+and M - is determined based on the voltage of the motor used

working principle:

1. Motor speed measurement: Hall sensors can sense the N and S poles of magnetic plates,

We use a Hall sensor that senses the S pole, which means that every time the Hall sensor senses a magnetic field

When the S value of the chip is reached, the Hall output terminal outputs a high level; Sensing the N pole of the magnetic disk

At this time, the Hall output terminal outputs a low level. When the motor rotates continuously, the Hall effect output

The output end outputs a square wave. The period T of the output square wave can be used to determine the motor's

The rotational speed, assuming that the magnetic plate we are using is P-polarized, the measured square wave period is

T. Measure the speed of the motor: n=60/PT

2. Measurement of motor forward and reverse rotation: Two different positions are placed in the circuit

Hall sensor, when the motor rotates in different directions, the square waves output by the two Hall sensors also

Different, as shown in the following figure,

When the motor rotates forward, after H1 detects the rising edge, H2 immediately enters

Descending edge; When the motor reverses, after H1 detects the falling edge, it follows

H2 is also a descending edge