Sound Sensor Red KY-038

The Red Sound Detection Sensor Module is a reliable and easy-to-use audio sensor designed for Arduino, Raspberry Pi, and other microcontroller platforms. Built using an electret condenser microphone and the LM393 comparator IC, this module detects sound levels beyond a set threshold and provides both analog and digital outputs.

It is ideal for sound-activated projects, clap switches, alarms, robotics, and STEM learning applications. The on-board potentiometer allows you to easily adjust sensitivity, while the LED indicator gives instant visual feedback when sound is detected.

This module detects the presence of sound, not its frequency or loudness, making it perfect for simple and effective sound-triggered automation.

🔧 Key Features

• 🎤 Electret condenser microphone for sound detection

• ⚙️ LM393 comparator for stable signal processing

• 🔄 Adjustable sensitivity using on-board potentiometer

• 💡 LED indicator for sound detection status

• 📤 Dual output: Analog (AO) & Digital (DO)

• 🔩 Mounting hole for easy installation

• 🎨 PCB color: Red or Blue (as available)

⚡ Technical Specifications

• Operating Voltage: 3.3V – 5V DC

• Detection Distance: Up to 0.5 meters

• Output Type:

  • AO (Analog Output): Real-time sound level voltage

  • DO (Digital Output): HIGH / LOW based on threshold

• Channel: Single-channel

• Comparator IC: LM393

🔌 Pin Configuration (Arduino Connection)

• VCC (+) → Arduino 5V

• GND (–) → Arduino GND

• AO → Arduino A0 (Analog reading)

• DO → Arduino Digital Pin (e.g., D13)