Description:

• Brand: KEYES
• 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: 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.