1. Product features:

1 can detect the sound intensity of the surrounding environment, use note: this sensor can only identify the presence of sound (according to the principle of vibration), can not identify the size of the sound or the sound of a specific frequency
2. Adjustable sensitivity (blue digital potentiometer in the figure)
3 working voltage 3.3v-5v
4 output form digital switch output (0 and 1 high and low level)
5. There are fixing bolt holes for easy installation
6 small PCB size: 3.2cm * 1.7cm

Module II wiring description

1 VCC is connected with 3.3v-5v voltage (it can be directly connected with 5V single chip microcomputer and 3.3V single chip microcomputer)
2 GND external GND
3 out small board switch output interface (0 and 1)

3. Instructions for use

1. The sound module is the most sensitive to the ambient sound intensity, which is generally used to detect the ambient sound intensity.
2. When the ambient sound intensity does not reach the set threshold, the module outputs a high level, and when the ambient sound intensity exceeds the set threshold, the module outputs a low level;
3. The digital output out of the small board can be directly connected with the single-chip microcomputer to detect the high and low levels, so as to detect the sound of the environment;
4. The output out of small board can directly drive the relay module of the store, thus forming a sound control switch;