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:
- Analog Output (A0): Provides a variable voltage based on the intensity of the detected sound. Useful for applications that need to measure volume levels.
- Digital Output (D0): Goes HIGH when the sound exceeds a user-defined threshold. This threshold is adjustable using the onboard potentiometer.
- High Sensitivity: The onboard microphone can pick up even subtle noises, allowing for reliable activation through claps, knocks, or voices.
- 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
| Specification | Details |
|---|---|
| Operating Voltage | 3.3V – 5V |
| Output | Analog (A0) and Digital (D0) |
| Adjustable Sensitivity | Yes (via onboard potentiometer) |
| Microphone Type | Condenser Electret Microphone |
| Use Case | Sound detection, claps, voice, knocks, noise threshold triggers |
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