Ky031 Knock Tap Sensor Module | Compoden
Ky031 Knock Tap Sensor Module
The Ky031 is a spring-based vibration sensor module that outputs a digital signal when a knock or tap is detected. Ideal for interactive projects, alarms, and percussive input. Its adjustable sensitivity lets you fine-tune the response to light taps or harder knocks.
Key Specifications
| Specification | Value |
|---|---|
| Operating Voltage | 3.3V to 5V DC |
| Output Type | Digital (Low on knock) |
| Sensitivity Adjustment | Onboard potentiometer |
| Detection Method | Spring vibration |
| Indicator LED | Lights on detection |
| Dimensions (approx) | 30 mm Ć 15 mm |
What You Can Build With This
- Knock-activated door lock system
- DIY electronic drum pad
- Tap-controlled light switch
- Vibration alarm for sensitive equipment
Compatibility
The module works with any microcontroller that reads digital signals, including Arduino Uno, Nano, Mega, ESP32, ESP8266, and Raspberry Pi (with voltage level shifting if needed). It runs on 3.3Vā5V logic, making it safe for both 5V and 3.3V boards.
Wiring Notes
Connect VCC to 5V (or 3.3V), GND to GND, and DO (digital output) to any GPIO pin. The sensor pulls DO low when a knock is detected. No external pull-up resistor is required; the module includes one. Keep the sensor firmly attached to the surface you want to monitor.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino Uno?
Yes, the Ky031 works directly with Arduino Uno. Connect DO to any digital input pin, read the state, and detect LOW pulses when a knock occurs. Example sketches are widely available.
Can I adjust the sensitivity?
Yes, the onboard trimmer potentiometer lets you set how hard the knock must be to trigger the output. Turn clockwise to increase sensitivity (detect softer taps).
What is the detection range?
The spring sensor primarily detects direct mechanical vibrations transmitted through solid objects. It works best when firmly attached to a surface. Airborne vibrations, like sound, will not reliably trigger it.
š¦ Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document ā step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this ā it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ā¹75 for orders up to ā¹999, FREE shipping above ā¹999
- COD Orders: ā¹125 shipping + ā¹50 COD fee = ā¹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items