Description:

This is microphone voice sound sensor module for Arduino
Model: KY-038
Adopt LM393 main chip
Electric condenser microphone
Features Single channel signal output
Low level output signal used for sound control light
Great module for sound alarm system
Working voltage: For DC 4-6V

Interface definition:

AO: analog output sensor
GND: ground
VCC: Power supply input range: 3V-24V.
DO: Digital Output (comparator output)
Two red LED indication: POWER and SENSOR. POWER: Power is off. SENSOR:
When the microphone senses sound reaches a certain value, this LED light.