Description
The KY-031 Knock Sensor Module is a simple and reliable vibration detection sensor designed to detect knocks, taps, and mechanical vibrations. It converts physical impact signals into digital electrical signals that can be read by microcontrollers such as Arduino, ESP32, ESP8266, and Raspberry Pi.
With its built-in adjustable potentiometer, users can fine-tune the sensitivity level to match different applications, making it ideal for interactive electronics, alarm systems, and DIY automation projects.
Key Features
- Vibration & Knock Detection – Detects physical impacts and vibrations
- Adjustable Sensitivity – On-board potentiometer for fine-tuning
- Digital Output – Simple HIGH/LOW signal
- Wide Voltage Support – Compatible with 3.3V and 5V systems
- Compact & Lightweight Design – Easy integration into projects
- Beginner-Friendly Interface
Specification
- Module Type: KY-031
- Operating Voltage: 3.3V – 5V DC
- Output Type: Digital (HIGH/LOW)
- Interface: 3-pin (VCC, GND, OUT)
- Sensitivity Adjustment: On-board potentiometer
- Dimensions: Approx. 32mm × 14mm × 8mm
How It Works
- The sensor detects mechanical vibration or knocking force.
- When vibration exceeds the set sensitivity threshold, the module outputs a digital signal (LOW or HIGH depending on configuration).
- Sensitivity can be adjusted using the onboard potentiometer.
Application
✔ Security and alarm systems
✔ Knock-activated switches
✔ Interactive DIY electronics projects
✔ Smart home automation
✔ Vibration monitoring in appliances
✔ Game controllers and interactive devices
Datasheet: For detailed technical specifications, refer to the KY-031 Knock Sensor Module Datasheet.