Module description

1 It can detect the sound intensity of the surrounding environment. Note: This sensor can only identify the presence or absence of sound (according to the principle of vibration). It cannot identify the size of the sound or the sound of a specific frequency.

2 Adjustable sensitivity (adjusted by blue digital potentiometer in the figure)

3 Working voltage 3.3V-5V

5 Output form Digital switch output (0 and 1 high and low level)

6 with fixing bolt holes for easy installation

7 Small board PCB size: 3.4cm * 1.6cm

8 Quantity:1pcs

 
Module interface description (4-wire system)

1 VCC external 3.3V-5V voltage (can be directly connected to 5v microcontroller and 3.3v microcontroller)

2 GND external GND

3 DO small board digital output interface (0 and 1)

 

instructions for use

1 The sound module is most sensitive to ambient sound intensity, and is generally used to detect the sound intensity of the surrounding environment.

2 When the ambient sound intensity does not reach the set threshold, the DO port outputs a high level, and when the ambient ambient sound intensity exceeds the set threshold, the module D0 outputs a low level;

3 The small board digital output D0 can be directly connected to the single-chip microcomputer, and the high-low level is detected by the single-chip microcomputer, thereby detecting the sound of the environment;

4 The small board digital output DO can directly drive the relay module of our store, which can form a sound control switch;