Product Description The 27mm Piezo Ceramic Elements Sound Sensor is a versatile sound and vibration detection module designed for DIY electronics, robotics, and IoT applications. Based on a 27mm piezoelectric ceramic disc, it converts sound waves or vibrations into electrical signals, making it useful for knock detection, musical instruments, buzzers, and acoustic sensors. This sensor is lightweight, durable, and easy to integrate with Arduino, ESP32, STM32, and Raspberry Pi (via ADC). Whether you’re building a knock-activated switch, vibration alarm, or sound-based project, this piezo element provides a simple and cost-effective solution. Available in Bangladesh through PowerMark Solution, this module is ideal for both students and professionals working on acoustic and vibration-based projects. Features 27mm piezoelectric ceramic disc element Converts sound waves or vibrations into electrical signals Lightweight and compact design High sensitivity to knocks, taps, and sound Wide frequency response range Compatible with Arduino, STM32, ESP32, Raspberry Pi (ADC required) Low-cost and reliable sensing solution Easy integration in DIY, robotics, and IoT projects Applications Knock and vibration detection systems Acoustic and sound sensing projects DIY musical instruments and drum pads Buzzers and alarm triggers Robotics feedback and control systems IoT smart monitoring devices Educational and STEM projects Technical Specifications Specification Details Element Type Piezoelectric ceramic disc Diameter 27mm Thickness ~0.5mm Operating Voltage 3V – 24V (when used as buzzer) Frequency Response Wideband acoustic & vibration Output Type Analog signal (voltage variation) Package Includes 1 × 27mm Piezo Ceramic Elements Sound Sensor Documentation Works with Arduino IDE (reads analog signal from A0 pin). Can be used as a sensor (input) or as a buzzer (output). Requires external amplifier circuit for some applications. FAQs Q1: What does the 27mm Piezo Ceramic Sensor detect?A: It detects sound, vibrations, and knocks. Q2: Can it also act as a buzzer?A: Yes, when powered with AC/DC signal, it can act as a buzzer. Q3: Is it analog or digital?A: It provides analog voltage signals. Q4: Can it be used directly with Arduino?A: Yes, connect it to an analog pin for signal reading. Q5: Does it need an amplifier?A: For small sound signals, yes. For knock detection, it works directly. Q6: What is the diameter of this sensor?A: 27mm. Q7: Is it reusable for multiple projects?A: Yes, it is durable and reusable. Q8: Can it be used in musical instruments?A: Yes, it’s widely used in drum pads and acoustic pickups. Q9: What is the voltage range for buzzer mode?A: Typically 3V – 24V depending on application. Q10: Is it suitable for IoT projects?A: Yes, it’s commonly used for sound and vibration monitoring in IoT devices.
