Copper-Clad Piezo Ceramic Transducer 20mm with Insulated Lead Wires with Shell

Description

The Copper-Clad Piezo Ceramic Transducer is a 20mm piezoelectric sound generator and vibration sensor, supplied with insulated lead wires and a protective shell. It consists of a piezoelectric ceramic layer bonded to a brass or copper substrate. When an AC voltage is applied across the element, the ceramic expands and contracts, causing the disc to flex and produce sound. Conversely, when the disc is mechanically deformed by vibration or impact, it generates a voltage—allowing the same component to function as a contact microphone, drum trigger, or knock sensor .

The “with shell” configuration typically provides a protective housing that also acts as an acoustic resonator, improving sound output at the resonant frequency compared to a bare disc. The insulated lead wires (typically 60–100mm) simplify connection to breadboards, PCBs, and microcontroller pins .

This transducer is suitable for DIY electronics projects, electronic drum triggers, acoustic instrument pickups, simple buzzers, and vibration detection. It is not a self-driven buzzer—it requires an external oscillator or microcontroller-generated square wave to produce sound. For sensor use, it requires a high-impedance load (typically a 1MΩ resistor) to protect the microcontroller input .

Critical limitations: The resonant frequency and capacitance vary significantly across suppliers (3.0kHz to 6.8kHz, 10nF to 15nF). The shell configuration is not standardized—verify whether it is a sealed resonator or an open frame. Sound output is modest without a tuned cavity. For sensor use, the output is a brief voltage spike that requires signal conditioning.

Features

• Dual Function: Can generate sound (with external drive) or detect vibration/impact (generating voltage) .

• 20mm Diameter: Standard size for drum triggers, contact microphones, and small buzzers .

• Insulated Lead Wires: Pre-attached PVC-insulated wires (typically 60–100mm) for easy connection .

• Protective Shell: Housing protects the ceramic element and may provide acoustic resonance (verify type with supplier).

• Copper/Brass Substrate: Durable construction with good conductivity and corrosion resistance .

• Low Power Consumption: Suitable for battery-powered and embedded projects .

• Wide Application Compatibility: Used in drum triggers, touch sensors, buzzers, and contact microphones .

Technical Specifications