Product Description The 20mm Piezo Ceramic Elements Sound Sensor is a compact and efficient sound and vibration detection module built on a 20mm piezoelectric ceramic disc. It converts vibrations, knocks, or acoustic signals into electrical outputs, making it ideal for sound detection, buzzers, alarms, and vibration monitoring systems. This sensor is lightweight, durable, and easy to integrate with Arduino, ESP32, STM32, and Raspberry Pi (via ADC). It is commonly used in knock detection, musical instrument pickups, IoT monitoring, and robotics feedback systems. Available in Bangladesh through PowerMark Solution, this piezoelectric sensor is a cost-effective solution for both hobbyists and professional applications. Features 20mm piezoelectric ceramic disc element Detects vibrations, knocks, and sound waves Converts acoustic energy into electrical signals Can be used as sensor (input) or buzzer (output) Compact and lightweight design Analog signal output (requires amplification for weak signals) Works with Arduino, ESP32, STM32, Raspberry Pi (via ADC) Reliable and long-lasting component Easy to integrate into IoT, robotics, and DIY projects Applications Knock and vibration detection systems Sound/acoustic sensors for IoT projects DIY buzzers and alarms Smart security and monitoring devices Musical instrument pickups and drum pads Robotics and motion feedback sensors STEM and educational electronics projects Technical Specifications Specification Details Element Type Piezoelectric ceramic disc Diameter 20mm Thickness ~0.4–0.5mm Operating Voltage 3V – 24V (when used as buzzer) Output Type Analog voltage signal Frequency Response Wideband acoustic & vibration Package Includes 1 × 20mm Piezo Ceramic Elements Sound Sensor Documentation Works with Arduino IDE (read analog signal via A0 pin). Can be used as a sensor (sound/vibration detection) or as a buzzer. External amplifier circuit may be required for weak audio signals. FAQs Q1: What does the 20mm Piezo Ceramic Sensor detect?A: It detects sound, vibration, and knocks. Q2: Can it be used as a buzzer?A: Yes, when powered with AC/DC it can act as a buzzer. Q3: Is it analog or digital?A: It provides an analog voltage output. Q4: Can I connect it directly to Arduino?A: Yes, connect the analog output to Arduino A0 pin. Q5: Does it need amplification?A: For strong knock signals, no. For audio sensing, yes. Q6: What is its diameter?A: 20mm. Q7: Is it reusable?A: Yes, it’s durable and can be used multiple times. Q8: Can it be used in IoT projects?A: Yes, widely used in IoT-based vibration and sound monitoring. Q9: Can it detect musical vibrations?A: Yes, commonly used in guitar pickups, drum pads, etc. Q10: What is the voltage range for buzzer mode?A: Typically 3V – 24V depending on use.
