A
Anonymous
Mar 22, 2026
Rating: 4/5
Good value
Cheap and effective. LED helps with debugging signals.
Description
Knock vibration sensor module with spring shake switch for electronic building blocks KY-031
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Output Signal | Digital High/Low |
| Pin Configuration | 3-Pin Header |
| PCB Dimensions | 32mm x 14mm |
| Mounting Hole Size | 3mm Diameter |
| Sensor Mechanism | Spring-based Switch |
| Indicator Light | Red LED Trigger |
| Compatibility | Arduino, ESP8266, ESP32 |
| Item Weight | 2.5 grams |
| Package Contents | 1 x KY-031 Module |
5 reviews
A
Anonymous
Mar 15, 2026
Rating: 5/5
Reliable
No false triggers noticed during testing. Happy with purchase.
A
Anonymous
Feb 23, 2026
Rating: 5/5
Perfect for beginners
Very easy to integrate into my security project.
A
Anonymous
Feb 19, 2026
Rating: 4/5
Works well
Sensitive enough for most applications. Good build quality.
A
Anonymous
Feb 05, 2026
Rating: 5/5
Great sensor
Used it for a vibration alarm. Works exactly as described.
5 FAQ
Q: Can I connect this directly to a GPIO?
A: Yes, ensure your GPIO voltage matches the module operating voltage.
Q: Does this support analog output?
A: No, this module provides a digital high/low signal only.
Q: What is the current consumption?
A: Typical standby current is very low, around a few microamps.
Q: Is there a datasheet available?
A: This is a standard KY series module, diagrams are widely available online.
Q: How do I mount this?
A: You can use the two mounting holes with M3 screws or solder headers.
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