Microphone Sound Detector Module — Digital & Analog Output

Microphone Sound Detector Module — Digital & Analog Output, Arduino Compatible

A versatile microphone sound detector module with both digital (DO) and analog (AO) outputs, making it suitable for both simple sound-triggered switching and precise sound level measurement. The on-board electret microphone capsule and LM393 comparator circuit provide a clean digital output when sound exceeds the adjustable threshold, plus a raw analog output for sound level monitoring via Arduino ADC.

The adjustable sensitivity potentiometer allows fine-tuning of the detection threshold to suit different environments — from quiet rooms to noisy workshops. Compatible with 3.3V and 5V microcontrollers including Arduino, ESP32, and Raspberry Pi.

Key Specifications

• Outputs: Digital (DO) + Analog (AO) | Comparator: LM393
• Operating voltage: 3.3V–5V DC | Current consumption: <15mA
• Sensitivity: Adjustable via on-board potentiometer
• Digital output: HIGH when sound exceeds threshold, LOW when quiet
• Analog output: 0–VCC proportional to sound level
• Indicator LEDs: Power LED + digital output status LED
• Connector: 4-pin 2.54mm header (VCC / GND / DO / AO)

Why Choose This Module?

• ✅ Dual output (digital + analog) — use digital for simple triggers, analog for sound level measurement
• ✅ Adjustable sensitivity — on-board potentiometer for threshold tuning
• ✅ 3.3V/5V compatible — works with Arduino, ESP32, STM32, and Raspberry Pi
• ✅ Status LED — visual feedback for digital output state during setup and debugging
• ✅ Compact module — standard 4-pin header, easy to integrate into any project

Typical Applications

• Sound-triggered relay and LED control
• Clap-activated switch projects
• Noise level monitoring and alert systems
• Arduino sound detection and voice trigger projects
• Security and intrusion detection systems
• Smart home automation sound triggers