What is the KY-037 Sound Sensor Module?

The SHILLEHTEK KY-037 Sound Sensor Module is a high-sensitivity microphone module capable of detecting sound levels and converting them into both analog and digital signals. Compatible with Raspberry Pi, Arduino, ESP32, and other microcontrollers, it's perfect for audio-reactive projects, voice triggers, and noise monitoring systems. With its adjustable sensitivity and pre-soldered pins, it's ready for immediate integration into your DIY electronics projects.

Operating Mechanisms of the KY-037

The KY-037 detects sound levels using its onboard condenser microphone and outputs both analog and digital signals. Here's how it works:

1. Analog Output (A0): Provides a variable voltage based on the intensity of the detected sound. Useful for applications that need to measure volume levels.
2. Digital Output (D0): Goes HIGH when the sound exceeds a user-defined threshold. This threshold is adjustable using the onboard potentiometer.
3. High Sensitivity: The onboard microphone can pick up even subtle noises, allowing for reliable activation through claps, knocks, or voices.
4. Pre-Soldered Design: Comes ready to use with pre-attached header pins for plug-and-play development on breadboards or jumper wires.

The KY-037 is great for interactive installations, security systems, and smart home automation where sound triggers are required.

Pins

KY-037 Pinout

VCC (Power Supply)

Supplies power to the module. Typically supports 3.3V to 5V.
Connection: Connect this to your microcontroller’s 3.3V or 5V pin.

GND (Ground)

Ground connection for the module.
Connection: Connect this to the GND pin on your microcontroller.

A0 (Analog Output)

Outputs a variable voltage based on the sound intensity.
Connection: Connect to an analog input on your microcontroller if you need to measure sound levels.

D0 (Digital Output)

Outputs HIGH when the sound exceeds the preset threshold.
Connection: Connect to a digital input pin to trigger events when sound is detected.

Technical Specifications