Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Brand | Keyes |
| Model Number | KY-031 Compatible |
| Output Type | Analog Voltage |
| Operating Voltage | 3.3V - 5V DC |
| Interface Type | 3-Pin PH2.54 Header |
| PCB Dimensions | 32mm x 15mm x 5mm |
| Weight | 4.5 grams |
| Sensor Element | Piezoelectric Ceramic |
| Compatibility | Arduino, ESP32, STM32, Raspberry Pi |
| Package Content | 1x Vibration Sensor Module |
Anonymous
Mar 23, 2026
Rating: 5/5
Solid build quality
The PCB looks professional and the piezo element is securely mounted. I have tested it on both 3.3V and 5V systems without any issues. Shipping was fast and the packaging protected the module well.
Anonymous
Mar 20, 2026
Rating: 4/5
Great value for money
Does what it says on the tin. I bought three of these for a home security prototype. The analog signal is smooth and easy to filter. Would recommend buying a few extras if you are prototyping.
Anonymous
Mar 06, 2026
Rating: 4/5
Good sensitivity, needs calibration
The module is well-built and the pins are sturdy. It is quite sensitive, which is good, but you will need to calibrate the baseline in your software to avoid false positives from ambient noise. Overall satisfied with the purchase.
Anonymous
Mar 01, 2026
Rating: 5/5
Easy to wire and use
I am new to electronics and this was very beginner-friendly. The pins are labeled clearly. I used it to detect when my washing machine stops vibrating. Works flawlessly with 5V logic.
Anonymous
Feb 01, 2026
Rating: 5/5
Perfect for my alarm project
This sensor works exactly as described. I connected it to my Arduino Uno and was able to read vibration values within minutes. The analog output makes it easy to set sensitivity thresholds in the code. Great value for DIY electronics.
Q: Do you provide sample code for Arduino?
A: Yes, please visit the product wiki link in the description. We provide basic example sketches to help you read the analog values quickly.
Q: How long are the header pins?
A: The module comes with standard 0.1-inch pitch header pins suitable for breadboards. They are approximately 10mm in length.
Q: Is there a digital output pin available on this version?
A: This specific model provides an analog output only. If you require a digital trigger, you will need to set a threshold in your microcontroller code based on the analog reading.
Q: What voltage does this module require to operate?
A: This module operates safely between 3.3V and 5V DC. It is compatible with most standard microcontrollers like Arduino and ESP8266.
Q: Can this detect knocks on a door?
A: Yes, the piezoelectric element is sensitive to shocks and vibrations such as knocks. However, sensitivity depends on how firmly the module is mounted to the surface.
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