The KY-038 Big Sound Sensor Module is a versatile sound detection module equipped with a high-sensitivity electret microphone and an LM393 voltage comparator. It can detect environmental sound levels and provide both analog (AO) and digital (DO) outputs, making it suitable for a wide range of audio detection applications.

The module features an onboard potentiometer that allows users to adjust the sound detection threshold. When the sound level exceeds the preset threshold, the digital output changes state, while the analog output continuously reflects the ambient sound intensity.

Compatible with Arduino, ESP32, ESP8266, Raspberry Pi, STM32, and other microcontroller platforms, the KY-038 is an excellent choice for beginners, students, makers, and engineers working on sound-responsive electronics.

Technical Specifications

• Model: KY-038
• Operating Voltage: 3.3V – 5V DC
• Output Type: Analog (AO) and Digital (DO)
• Comparator IC: LM393
• Microphone Type: Electret condenser microphone
• Sensitivity: Adjustable via onboard potentiometer
• Interface Pins: VCC, GND, AO, DO
• Status Indicators: Power LED and Signal LED
• Operating Temperature: -20°C to +70°C

Applications

• Clap switch projects
• Voice-activated systems
• Sound detection alarms
• Noise monitoring
• Smart home automation
• Interactive electronic projects
• Robotics