Normally Closed Vibration Alarm Sensor Module Type and behavior: normally closed NC vibration sensor module. When no vibration is present, the internal switch is closed and the output is a low level; the green LED is lit. Upon vibration or impact, the switch opens and the output goes to a level; the green LED is not lit. Output and compatibility: output can be directly connected to a microcontroller or singlechip computer to detect vibration levels and trigger alarms. Designed for straightforward integration into alarm systems and control circuits. Indicator: green LED provides a visual indication of normal operation (LED on when idle; off when vibration is detected). Applications and use cases: Home or office security: monitor vibration of doors, windows, or secured objects to trigger alarms. Vehicle and motorcycle security: detect tampering or movement to activate antitheft alarms. Earthquake and environmental monitoring: sense sudden vibrations for alerting systems. Industrial monitoring: observe machinery or equipment for abnormal vibration and prompt maintenance or shutdown. Key attributes Function: vibration detection with NC output for reliable alarm triggering Compatibility: direct connection to microcontrollers and singlechip systems Performance: responsive to instantaneous vibration, with clear /low output states Size and form: compact vibration sensor module suitable for integration into various projects Construction: designed for dependable vibration sensing and straightforward wiring Practical guidance Use cases commonly involve wiring the module to a controller that can log events, sound an alarm, or trigger a relay or other actuator based on the level output signal during vibration.