KY-038 Sound Sensor Active LED Arduino

Описание: High-sensitive Voice Sensor or KY-038 sound sensor is a very basic sound level detector module.
Sound / Voice Sensor has two output:
AO, analog output, real-time output voltage signal of microphone
DO, when the intensity of the sound to reach a certain threshold, the output high and low
level signal. ,Sensitivity can be adjusted via the potentiometer on the module

Diagram http://bit.ly/2RJyxTV