This 4-pin microphone sensor detects ambient sound levels and outputs analog (intensity) and digital (threshold-triggered) signals. Ideal for clap switches, voice-activated systems, and noise monitoring, it features adjustable sensitivity and a built-in LM393 comparator for reliable performance.
Key Benefits
✔ Dual Output – Analog (sound level) + Digital (threshold trigger)
✔ Adjustable Sensitivity – Fine-tune with onboard potentiometer
✔ Low Noise – Electret microphone with signal conditioning
✔ Plug-and-Play – Works with Arduino/ESP/RPi
Technical Specifications
Core Specifications
Operating Voltage: 3.3V–5V DC
Output Signals:
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- AO (Analog: 0–5V, proportional to sound)
- DO (Digital: HIGH/LOW, triggers at threshold)
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Frequency Response: 50Hz–20kHz (human-audible range)
Sensitivity Adjustment: Blue potentiometer
Electrical Characteristics
Current Draw: ~4mA (idle)
Comparator Chip: LM393
Interface: 4-pin (VCC, GND, AO, DO)
Physical Properties
Dimensions: 32mm × 17mm
Microphone Type: Electret Condenser
Indicator LED: Red (power) + Blue (digital trigger)
Mounting: 2x M2.5 screw holes
Why Choose This Microphone Module?
✔ Voice-Activated Projects – Build clap-controlled lights/robots
✔ Noise Monitoring – Detect sound levels in dB
✔ Easy Integration – No audio processing expertise needed
✔ Budget-Friendly – Low-cost sound sensing
Common Uses:
Smart home voice triggers
Decibel meters
Security systems (glass break detection)
Interactive art installations
Pro Tip:
For analog mode, use analogRead() (higher values = louder sound).
For digital mode, adjust the potentiometer until the blue LED triggers at your desired volume.
Package Includes:
1 × Microphone Sensor Module