This is Warning device When the sound exceeds the set level. The KY-037 is a voice receiver. And exported with ISD-1820 and BUZZER. The ISD-1820 is a voice recorder and plays if configured to match KY-037 and Set KY-037 to analog because analogue is a measurement that can measure the sound, which is different from the digital values can be measured only 0 and 1.
Let's check the sound value. If the sound turns on, the LED will turn on.
Add the buzzer and check the sound value together. If the sound turns on
Add the sound recorder with check the sound value. If the sound turns on,the buzzer and recorder will turn on.
Add the LED SWITCH 3 PRONG
Complete arranging the components.