Piezoelectric sensors convert mechanical force into electrical energy. They work using the piezoelectric effect, which occurs in certain materials with a unique crystal structure. When you press, squeeze, or vibrate these materials, their internal charges shift, creating a voltage across the material. The amount of voltage they generate depends on several factors, including the amount of applied force, the type of piezoelectric material used, and the sensor’s shape and thickness. If the vibrations match the material’s Natural frequency, the voltage output can get a significant boost. Temperature also plays a role, as some materials are more stable than others. Additionally, how the sensor is connected to a circuit affects how much charge it stores and releases. That’s why these sensors are commonly found in devices like accelerometers, microphones, ultrasound equipment, and even energy-harvesting gadgets.