Sound Sensor Module (4Pin)

Features:

• Main chip: LM393, with polar microphone
• Working voltage: DC 4~6 V
• Signal output indicator.
• Single-way signal output.
• Output signal is low level.
• When there is a sound, output low level, signal light is on.
• Can be used for voice-activated lights, with light sensors to make a sound and light alarm, and in the place for voice control, and voice detection.

For Arduino Connection:

• Connect +5V to +5V on Arduino.
• Connect GND to GND on Arduino.
• Connect OUT to digital pin 2.