Vibration Sensor

The SW-520D is a simple, cost-effective vibration sensor that detects vibrations and impacts. It works by using a spring and ball mechanism, which closes or opens a circuit depending on the vibration intensity. This sensor provides a digital on/off output, making it easy to integrate into electronic projects like alarms, security systems, and robotics.They are mostly used in toys, gadgets and appliances.  The switch when raised to 10-90 degree or shakes turns into "on position ". The pins have no polarity and can be interchanged.It is  completely airtight, waterproof, dustproof.