Pin configuration
| Pin | Function |
|---|---|
| VCC | Power supply (3.3 V–5 V) |
| GND | Ground |
| A0 | Analog output (sound level) |
| D0 | Digital output (HIGH/LOW when sound exceeds the set threshold) |
Features
- Operating voltage: 3.3 V to 5 V
- Built-in electret microphone
- LM393 comparator for digital output
- Adjustable sensitivity using the onboard potentiometer
- Power LED and signal indicator LED
How it works
- Analog Output (A0): Produces a voltage that changes with the detected sound level. Read it using
analogRead(). - Digital Output (D0): Changes state when the sound level crosses the threshold set by the potentiometer. Ideal for clap or noise detection.
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