Description
About this item:
- Main Components: Electret microphone (missing or not soldered in your image), LM393 comparator
- Power Supply: 3.3V – 5V
- Output Pins: 3 pins (VCC, GND, DO) or 4 pins (adds AO for analog out in some versions)
- Digital Output (DO): Outputs HIGH/LOW based on sound threshold (adjustable via potentiometer)
- Analog Output (AO): (If present) Outputs analog voltage representing sound level





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