PWM DC Motor LED Dimmer Speed Driver Controller Module With 5A Switching Function

Product parameters:
 

Matters needing attention:
· DC motor governor input is DC, can not be directly connected to AC (such as: 220V AC household), otherwise it will burn out!!!
· The positive and negative terminals of DC power supply should not be connected back, otherwise the governor may be damaged.
· The motor can be positive or negative. When the direction of operation is inconsistent with the expectation, the direction can be changed by adjusting the line sequence.
· Adjusting potentiometer knob can change the duty cycle of governor output and motor speed.

The working principle of the product module: the output voltage is changed by changing the duty cycle of the PWM, so as to change the speed of the motor. The so-called PWM is a pulse width modulator, which provides the motor with a pulse width adjustable with a certain frequency. The bigger the pulse width is, the bigger the duty cycle is. The bigger the average voltage provided to the motor, the higher the speed of the motor. On the contrary, the smaller the pulse width, the smaller the duty cycle. The smaller the average voltage provided to the motor, the lower the motor speed.

The basic principle of pulse width modulation (PWM): The control mode is to control the on-off of the switching devices in the inverting circuit, so that a series of pulses with equal amplitude can be obtained at the output end, and these pulses can be used to replace the sinusoidal wave or the required waveform. That is to say, multiple pulses are generated in the half cycle of the output waveform, so that the equivalent voltage of each pulse is sinusoidal waveform, and the output is smooth and the low-order harmonics are less. By adjusting the width of each pulse according to certain rules, the output voltage and frequency of the inverter circuit can be changed.

When the mobile phone is mounted on the WiFi module, the commands are sent in the following order:

(default baud rate 115200)

1. AT+CWMODE=2, that is, select AP mode;

2, AT + RST, reset;

3, AT + CIPMUX = 1, open multiple connections;

4, AT + CIPSERVER = 1, 8080, configure the TCP server, set the port number;

5, AT + CIOBAUD = 9600 set the baud rate to 9600. (Because the relay control chip works at the baud rate of 9600)

6. AT+CIFSR, check the IP address in AP mode, for example: APIP, "192.168.4.1";

7. The mobile phone connection name is the WIFI signal starting with AI-THINKER or ESP8266;

8. Enter the address and port in the "TCP Connection" APP, such as 192.168.4.1 and 8080;

9. Click on the corresponding gray square to control the relay.