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Tap/Knock Sensor Module (KY-031)

SKU: 7L49P6Z8NK
★★★★ ★ ★
4.5 (76 reviews)
The KY-031 Tap Sensor Module is a compact vibration detection module designed to detect taps, knocks, shocks, and mechanical vibrations. It uses a highly sensitive spring-based vibration switch that momentarily closes when subjected to an impact or tap, generating a digital output signal that can be read by a microcontroller. The module provides a simple digital output, making it ideal...
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The KY-031 Tap Sensor Module is a compact vibration detection module designed to detect taps, knocks, shocks, and mechanical vibrations. It uses a highly sensitive spring-based vibration switch that momentarily closes when subjected to an impact or tap, generating a digital output signal that can be read by a microcontroller.

The module provides a simple digital output, making it ideal for detecting physical interactions such as tapping on a surface, vibration monitoring, and impact sensing. Its compact design and low power consumption make it suitable for Arduino, ESP32, STM32, Raspberry Pi Pico, AVR, PIC, and other development platforms.

The KY-031 is widely used in security systems, anti-theft devices, interactive electronics, robotics, smart home automation, and educational electronics projects where reliable tap or vibration detection is required.

Key Features

  • Detects taps, knocks, and vibrations
  • High-sensitivity spring-based vibration sensor
  • Digital output signal
  • Fast response to impacts
  • Low power consumption
  • Compact PCB module design
  • Simple three-pin interface
  • Reliable mechanical sensing
  • Easy microcontroller interfacing
  • Stable digital output
  • Compatible with Arduino, ESP32, STM32, and Raspberry Pi
  • Suitable for security and automation applications
  • Ideal for educational and DIY electronics pro

Shipping & Returns

Orders placed before 3 PM IST will be shipped on the same day (excluding Sundays and Public holidays) through our shipping partners. In rare cases, the pickup may get delayed during Public holidays / Bandh / Environmental disturbances.

Specifications

Specifications:

Module Type: Tap Sensor Module
Model: KY-031
Sensor Type: Spring-Based Knock/Vibration Switch
Detection Principle: Mechanical Vibration Detection
Operating Voltage: 3.3V to 5V DC
Operating Current: Less Than 5mA
Output Type: Digital Output
Output Logic: TTL Compatible
Detection Method: Tap, Knock, and Vibration Detection
Response Time: Instantaneous
Switch Type: Normally Open Mechanical Contact
Built-in Resistor: 10kΩ Pull-Up Resistor
Interface Pins: VCC, GND, S
Operating Temperature: -20°C to +70°C
Storage Temperature: -40°C to +85°C
PCB Dimensions: Approximately 18.5mm × 15mm
Mounting Type: Through-Hole Module
Compatibility: Arduino, ESP32, STM32, Raspberry Pi Pico, AVR, PIC

Additional Resources

Tap/Knock Sensor Module.PDF

FAQ

1. What is the KY-031 Tap Sensor Module used for?

The KY-031 is used to detect taps, knocks, shocks, and vibrations in applications such as security systems, interactive electronics, robotics, and automation projects.

2. How does the KY-031 Tap Sensor work?

The module uses a spring-based mechanical switch that momentarily closes when exposed to a tap or vibration, generating a digital output signal that can be detected by a microcontroller.

3. Can the KY-031 be connected directly to Arduino and ESP32 boards?

Yes, the module operates from 3.3V to 5V and provides a TTL-compatible digital output that can be directly connected to Arduino, ESP32, STM32, Raspberry Pi Pico, and other compatible microcontrollers.

4. Does the KY-031 measure vibration intensity?

No. The KY-031 only detects the occurrence of a tap or vibration and provides a digital HIGH/LOW output. It does not measure the magnitude of the vibration.

5. What applications commonly use the KY-031 module?

The module is commonly used in tap-activated devices, vibration alarms, security systems, anti-theft devices, robotics, embedded systems, and educational electronics projects.