The KY-031 Percussion Knocking Knock Sensor Module uses a KY-031 piezoelectric knock sensor element on a PCB module with mounting holes, giving a single digital output through VCC, GND, and signal pins, operating from 3.3V to 5V DC. Piezoelectric materials generate a brief voltage spike when mechanically stressed by a sharp impact — a knock rather than sustained pressure — which is why this ky-031 knock sensor is specifically optimized for percussive tap and knock events rather than continuous vibration or slow pressure changes.
The ky-031 knock sensor module’s PCB mounting holes are a practical installation detail worth noting — they allow the module to be screwed securely onto a surface, box lid, or enclosure panel rather than just sitting loosely on a breadboard, ensuring the piezo element stays in firm contact with the surface being monitored for knock events. This ky031 sensor price reflects a complete ready-to-use module rather than a bare piezo disc, providing the 3-pin interface directly usable with a knock sensor module arduino setup without extra conditioning circuitry.
this percussion vibration sensor outputs only a single digital HIGH/LOW trigger with no analog signal, code cannot measure how hard a knock was — only that one occurred, making intensity-sensitive applications need a different sensor with analog output. This module is well-suited for projects developer building surface-mounted knock trigger circuits and electronics projects.
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Features:
- Piezoelectric element responds to sharp percussive knock and tap impacts
- PCB mounting holes allow secure surface installation via screws
- Simple 3-pin layout for direct Arduino digital pin connection
- Clean digital output without additional conditioning circuitry needed
- 3.3V to 5V compatible with Arduino and similar boards
Pin diagram of KY-031 Knock Sensor:
Technical specifications:
Applications:
- KY-031 used for Arduino surface-mounted knock trigger build
- Security box uses knock sensor module for entry
- Uses game controller ky031 sensor for tap-to-action trigger
- Drum pad uses knock sensor module arduino for tap-detection circuit
Package includes:
- 1 x KY-031 Percussion Knocking Knock Sensor Module
Shaurya Nambiar –
Exactly as described
Saisha Grewal –
Secure payment gateway and careful packaging ensured a smooth purchasing experience, while the module delivered responsive and consistent knock detection performance.
Kian Malhotra –
Bubble wrap packing provided