Description
The main chip is LM393. Signal is clean, waveform is good, driving ability is strong.
The sound module sound intensity most sensitive to the environment, is generally used to detect the intensity of ambient sound.
Module does not reach the set threshold environmental sound intensity, OUT output high, when the external environmental sound intensity exceeds a set threshold, the module OUT becomes low.
Small board digital output OUT can be directly connected to the microcontroller through the microcontroller to detect high and low, thereby detecting sound environment.
When the sound intensity exceeds a certain threshold, a low-level (digital output 0) signal is generated and the light goes out. Otherwise, a high-level (digital output 1) signal is output and the light is on.
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