Do you need a vibration motor? So we have a small WM Vibration Motor Switch – Toy Motor Sensor Module – DC Motor Mobile Phone Vibrator – DIY Kit Board sensor suitable as a non-audible indicator. When the input is high, the motor vibrates, just like your silent mode phone. The vibration intensity of the motor can be controlled by PWM; moreover, this module can easily convert electrical signals to mechanical vibration. Applications of this device include vibration-sensitive interactive products, wearable smart device, vibration reminders, etc.