The 3-pin 801S Vibration Sensor Module is based on 801S Vibration Sensor which works on the principle that when the movement or vibration occurs the resistance changes and even working as switch if high vibrations is detected. It has a gold plated measuring sensor so it is reliable and will work for a long time. The sensitivity of this can be controlled by an onboard potentiometer and LM393 Comparator IC. This is very useful in detecting Collisions, Burglary protection alarm system, Vibration alert system etc. 801S Vibration Sensor Module Specifications: Supply voltage:3.3V-5V On-board LM393 Comparator IC The comparator output sensitivity can be change with the help of potentiometer.        Output form: digital switch output (0 and 1) Has a fixed bolt hole for convenient installation   Product Description To connect it with Microcontrollers like Arduino/ Raspberry Pi/NodeMcu, ESP8266, ESP32, etc, just power the device using VCC and GND pins and connect the Digital Output to any Digital I/O pin of the Microcontroller you are using. Package Contents: 1×3pin 801S vibration Sensor Module