KY-037/KY-038 Sound Sensor Module for Arduino, ESP32 & Raspberry Pi | Microphone Sound Detection Module
Detect ambient sound and audio levels with the KY-037/KY-038 Sound Sensor Module, compatible with Arduino, ESP32, Raspberry Pi, NodeMCU, STM32, and other microcontrollers. Featuring a built-in electret microphone, adjustable sensitivity, and both analog and digital outputs, this module is ideal for sound detection, clap switches, voice-activated projects, noise monitoring, smart home automation, robotics, and STEM education. Its compact design and easy GPIO interfacing make it an excellent choice for beginners, makers, and professional embedded system developers.
Customize
Share :
KY-037/KY-038 Sound Sensor Module for Arduino, ESP32 & Raspberry Pi
The KY-037/KY-038 Sound Sensor Module is a compact microphone-based sound detection module designed for measuring ambient sound intensity in electronics and IoT projects. Equipped with a high-sensitivity electret microphone, the module converts sound waves into electrical signals that can be processed by microcontrollers such as Arduino, ESP32, Raspberry Pi, NodeMCU, and STM32.
The onboard LM393 comparator and adjustable potentiometer allow users to configure the sound detection threshold for digital output, while the analog output provides varying voltage levels based on the surrounding sound intensity. This makes the module suitable for clap switches, sound-triggered lighting, voice activation, security systems, robotics, and educational electronics experiments.
Whether you're building an interactive project or learning about sensor interfacing, the KY-037/KY-038 Sound Sensor Module offers an easy and reliable solution.
Key Features
- High-Sensitivity Electret Microphone
- Detects Ambient Sound Intensity
- Analog and Digital Outputs
- Adjustable Sound Detection Threshold
- Onboard LM393 Comparator
- Sensitivity Adjustment Potentiometer
- LED Status Indicator
- Fast Response Time
- Compact PCB Design
- Low Power Consumption
- Easy GPIO Interface
- Compatible with Arduino, ESP32, Raspberry Pi, NodeMCU, and STM32
- Ideal for Robotics, IoT, Automation, and STEM Projects
Technical Specifications
| Specification | Details |
|---|---|
| Product Type | Sound Detection Sensor Module |
| Module Model | KY-037 / KY-038 Compatible (Verify according to manufacturer specification) |
| Sensor Type | Electret Microphone |
| Comparator IC | LM393 |
| Outputs | Analog (AO) & Digital (DO) |
| Operating Voltage | 3.3V – 5V DC |
| Sensitivity Adjustment | Onboard Potentiometer |
| Response Type | Sound Intensity Detection |
| Indicator LED | Yes |
| Interface | Analog & Digital GPIO |
| Compatibility | Arduino, ESP32, Raspberry Pi, NodeMCU, STM32 |
Applications
- Sound Detection
- Clap Switch Projects
- Voice-Activated Systems
- Noise Monitoring
- Smart Home Automation
- Security Alarm Systems
- Robotics
- IoT Projects
- Audio Trigger Systems
- Interactive Electronics
- STEM Education
- Embedded Systems
- DIY Electronics
- Engineering Projects
- Environmental Sound Monitoring
Package Includes
- 1 × KY-037/KY-038 Sound Sensor Module
Why Buy from Horizocart?
- Genuine quality-tested sensor modules
- Reliable sound detection performance
- Fast shipping across India
- Secure packaging
- Affordable pricing
- Trusted electronics supplier
- Excellent customer support
- Ideal for beginners, makers, students, and professionals
Frequently Asked Questions
Q. Is this compatible with Arduino Uno?
Yes. It is fully compatible with Arduino Uno, Nano, Mega, Leonardo, and other Arduino-compatible boards.
Q. Can I use it with ESP32?
Yes. It supports ESP32 using both analog and digital GPIO pins.
Q. Does it work with Raspberry Pi?
Yes. The digital output can be connected directly to Raspberry Pi GPIO pins. The analog output requires an external ADC because Raspberry Pi does not have built-in analog inputs.
Q. What is the difference between the analog and digital outputs?
- Analog Output (AO): Provides a varying voltage corresponding to the detected sound intensity.
- Digital Output (DO): Outputs HIGH or LOW when the sound exceeds the threshold set using the onboard potentiometer.
Q. Can I adjust the sensitivity?
Yes. The onboard blue potentiometer allows you to adjust the sound detection threshold for the digital output.
Q. Is this a microphone for recording audio?
No. It is designed for sound intensity detection, not for recording or processing high-quality audio.
Q. What projects can I build with this module?
You can build clap switches, voice-triggered lights, sound alarms, smart home devices, robots, and IoT-based sound monitoring systems.
