Piezo Sensor Element 35mm

Overview

Unlock the power of physical interaction with the MOKWN Piezo Sensor Element 35mm. This versatile sensor is the perfect entry point into the world of vibration, impact, and pressure sensing. When the piezo disc is physically deformed—whether by a knock, a tap, or a sound wave—it generates a small voltage, making it an ideal component for a wide range of interactive and measurement projects. From building your own drum pad to creating a smart doormat or a vibration-based alarm, this 35mm piezo element offers reliable, low-cost sensing for makers, students, and engineers alike.

Key Features

• High Sensitivity: Detects even subtle vibrations and impacts, providing a clear voltage output.
• Wide 35mm Diameter: Larger sensing area for easier triggering and consistent performance.
• Durable Construction: Made with a robust brass base and ceramic disc, built to withstand repeated flexing.
• Easy to Use: Simple two-wire connection (positive and negative) – no complex circuitry required.
• Self-Generating: Produces a voltage without needing an external power source, perfect for energy harvesting experiments.

Technical Specifications

• Sensor Type: Piezoelectric disc
• Diameter: 35mm
• Material: Brass base, ceramic piezoelectric element
• Output: Analog voltage signal (proportional to deformation)
• Voltage Output: Up to ±90V (depending on force applied, safe when connected to high-impedance inputs)
• Capacitance: ~20nF (typical)
• Resonant Frequency: ~4.6kHz ±0.5kHz
• Operating Temperature: -20°C to +70°C
• Wire Length: 100mm (approx.)

Applications & Use Cases

• Vibration Detection: Use in alarm systems, door/window sensors, or washing machine imbalance detectors.
• Impact Sensing: Build a drum pad, electronic percussion, or a knock-activated light switch.
• Sound Detection: Create a simple sound-reactive LED display or a voice-activated device.
• Touch/Pressure Sensing: Detect a tap or press on a surface for interactive art or a touch-sensitive switch.
• Educational Projects: Teach the principles of piezoelectricity and energy conversion in STEM classrooms.
• Energy Harvesting: Experiment with generating power from footsteps or mechanical vibrations.

What's Included

• 1x Piezo Sensor Element 35mm (with pre-soldered wires)

Compatibility

• Works with any microcontroller with an analog input, such as Arduino, Raspberry Pi, ESP32, and STM32.
• Requires a high-ohm resistor (e.g., 1MΩ) for proper signal conditioning (recommended, not included).
• Compatible with MOKWN's range of development boards and sensor kits.

MOKWN Recommendation

For best results, pair this piezo sensor with an Arduino or ESP32 and use a 1MΩ pull-down resistor to stabilize the signal. This sensor is a fantastic addition to any maker's toolkit for prototyping interactive projects. If you're looking for a ready-to-use module, consider our KY-031 knock sensor module, which includes the necessary circuitry. For any questions, our team at MOKWN is here to help you get the most out of your projects!