HKD Microphone Sound Detector Module | 5V ECM LM393 Analog & Digital Output

The HKD Microphone Sound Detector Module is a compact and versatile audio detection breakout board designed for use in DIY electronics, robotics, and security applications. Featuring an Electret Condenser Microphone (ECM) sensor, the module can detect loud sounds and output both analog and digital signals, making it ideal for integration with microcontrollers such as Arduino, Raspberry Pi, ESP32, and other development platforms.

Powered by a +5V supply, the module offers two modes of output:

• AO (Analog Output): Provides a real-time voltage signal representing sound intensity.
• DO (Digital Output): Triggers high when the sound exceeds a set threshold, adjustable via the onboard potentiometer.

An LM393 comparator circuit ensures accurate sound-level detection, while the LED indicators (LED1 for power, LED2 for sound detection) provide easy visual feedback during operation. The module is equipped with a 3mm mounting hole for secure installation and compact dimensions (35mm × 15mm × 14mm) for easy integration into projects.

This module is particularly suited for applications that require sound-triggered responses, such as alarm systems, security detection, automation projects, and interactive electronics. It is optimized for detecting loud noises like door slams, alarms, barking dogs, or glass breaking, but it is not intended for low-level sound detection such as normal speech.

Features & Specifications

• Type: Electronic Microphone Sound Detector Module
• Sensor: Electret Condenser Microphone (ECM)
• Power Supply: +5V DC
• Comparator Circuit: LM393
• Analog Output (AO): Real-time sound voltage signal
• Digital Output (DO): High when sound exceeds threshold (adjustable)
• Potentiometer: Built-in, adjusts sound threshold level
• Indicators:
  LED1: Power on indicator
  LED2: Sound detection indicator
• Mounting Hole Size: 3mm
• Dimensions: 35mm × 15mm × 14mm (L × W × H, excl. connectors/mic)
• Applications: Security alarms, automation, robotics, sound-activated devices

What's in the box
1 x HKD Microphone Sound Detector Module | 5V ECM LM393 Analog & Digital Output