KY-031 knock sensor - analog output 0-5 V, adjustable
This goes with it
Pay in 30 days
Pay in 30 days
Description
Product Overview
- Mechanical switch for detecting knocks, impacts, and vibrations
- Analog output of 0 to 5 V on one pin
- Trigger threshold adjustable via potentiometer
- Ready to use, no calibration required
- Dimensions 32 * 24 mm, three connections for VCC, GND, and signal
Product Description
The knock sensor detects mechanical shocks and vibrations using a spring-loaded contact. The analog voltage at the signal output ranges from 0 to 5 V and changes with the intensity of the impact. The threshold at which the module responds can be adjusted using a potentiometer, allowing the sensor to be adapted to different sensitivity requirements.
The module operates at a supply voltage of 5 V and therefore requires direct compatibility with 5-V logic systems such as standard Arduino boards or similar platforms. Since the output voltage is analog, multiple impact intensities per second can be detected and evaluated without measurements overwriting one another. Adjusting the potentiometer makes it possible to filter out interference from slight vibrations and register only actual impacts.
Applications include detecting knocks on doors, monitoring vibrations in machinery, or detecting unwanted movement in installed devices. A portable project could combine this sensor with a portable microcontroller board to build an impact detector that triggers an acoustic signal when a fall is detected.
Operation requires only a 5-V power source, such as the board itself or a separate power supply. The sensor is suitable for prototypes and testing purposes; permanent installation on doors or other components requires mechanical fastening, which is not specified in the supplied documentation.
Safety Information
The module is intended exclusively for building prototypes and for testing and development purposes and is not suitable for use in critical or safety-relevant systems without further evaluation. Although it operates at a safe voltage, a qualified electrician should be consulted if there are questions about integrating it into larger systems or if it is to be used near existing electrical installations.
Scope of Delivery
- 1x KY-031 - Knock sensor, impact sensor