LM393 Sound Detection Sensor Module KY-038

The LM393 Sound Detection Sensor Module KY-038 is a high-sensitivity microphone sensor designed for detecting sound levels in various environments. Compact, lightweight, and reliable, this sound sensor is ideal for Arduino and other microcontroller projects that require accurate sound detection. It is equipped with both analog and digital outputs, making it versatile for a wide range of applications including automation, noise monitoring, and interactive projects.

How It Works

This sound detection module uses an LM393 operational amplifier (op-amp) to amplify the signal from its built-in condenser microphone. The amplified signal is compared to a reference voltage set by the onboard potentiometer, which determines the sound threshold. When the sound level exceeds the set threshold, the signal LED lights up and the digital output is triggered. The analog output changes proportionally to the detected sound intensity, allowing real-time sound level monitoring.

Key Features

• High sensitivity sound detection using LM393 op-amp
• Compact and lightweight design
• Both analog and digital outputs for flexible usage
• Threshold sensitivity adjustable via onboard potentiometer
• Two LEDs – power indicator and signal indicator
• Low power consumption – suitable for battery-powered projects

Specifications

• Operating Voltage: 3V to 5V
• Digital Output: 0 or 1
• Analog Output: 0V to 3.3V
• Sensitivity: Adjustable
• Signal-to-Noise Ratio: >50dB
• Dimensions: 28mm x 28mm x 11mm

Pinout

• VCC – Power supply (3V–5V)
• GND – Ground
• OUT – Digital output pin
• AO – Analog output pin

Applications

• Sound level detection for automation projects
• Triggering devices based on noise levels
• Interactive sound-controlled lighting
• Noise monitoring systems
• Data collection for sound analysis

Package Includes

• 1 × LM393 Sound Detection Sensor Module KY-038

The KY-038 Sound Detection Sensor is Arduino-compatible, energy-efficient, and perfect for DIY electronics, IoT devices, and smart automation systems. Whether you're building a sound-activated lighting project or a noise monitoring solution, this module delivers accurate and reliable performance.