Specifications:

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.

Connecting with Arduino:

• Pin + to Arduino 5+
• Pin – to Arduino –
• Pin A0 to Arduino A0 (for analog program)
• Pin D0 to Arduino 13 (for digital program)