KY-0030 – ARDUINO MICROPHONE SENSOR MODULE
- 1 AO: sensor analog output;
- 2 GND: ground
- 3 VCC: power input, range: 3V-24V.
- 4 DO: digital value output (comparator output)
- Two road red LED indicator: POWER and SENSOR. POWER: the power indicator will be lit up once powered-on. SENSOR: sensor indicator will be lit up once the sound detected by microphone reaches a certain point.
