If the module does not vibrate, the vibration switch was closed on state, output of low output, the green indicator light.
The product vibrates, vibration switch momentary disconnect, output is driven high, the green light does not shine.
The output can be directly connected with the microcontroller, which to detect high and low level, so as to detect whether the environment exist vibration, play a role in the alarm.
Using SW-420 normally closed type vibration sensor
Comparator output, clean signal, good waveform, strong driving ability, >15mA
Working voltage 3.3V ~ 5V
Output format: digital switching output (0 and 1)
Using a wide voltage LM393 comparator
With bolt holes for easy installation
Small PCB size: 3.2 x 1.4cm
Power direction cannot be reversed, otherwise it is possible to burn the chip
Signal LED light is output Low, signal LED OFF output is High
The output level close to the input voltage
Various vibrations trigger: Arduino, Smart car, Earthquake alarm, Motorcycle Alarm, Theft alarm