Piezo Buzzer

Description

• Working Principle: Piezo buzzers are based on the piezoelectric effect. When a voltage is applied to the piezoelectric material (typically quartz crystals), it vibrates, producing sound waves.
• Sound Generation: They produce sound through the mechanical vibration of a piezoelectric diaphragm. This vibration generates acoustic waves that we perceive as sound.
• Compact and Lightweight: Piezo buzzers are small, lightweight, and often come in flat or cylindrical shapes, making them suitable for space-constrained applications.
• Low Power Consumption: They generally consume low power, making them energy-efficient for battery-powered devices.
• Frequency Range: Piezo buzzers are available in a wide range of frequencies, from ultrasonic to audible ranges. The sound frequency is determined by the diaphragm’s dimensions and the input voltage.
• Tone Selection: Some piezo buzzers are designed to produce specific tones or melodies. Others can generate simple beeps or continuous sounds.
• Voltage Range: Piezo buzzers typically operate at low voltage, commonly in the range of 3-30V DC, depending on the specific model.
• Polarity Sensitive: Piezo buzzers are polarity sensitive, meaning that applying voltage with the correct polarity is essential for them to function properly.
• Applications: Common applications include alarms, buzzers in household appliances, electronic devices, timers, and notification systems.
• Sound Output: The sound output is generally less loud compared to other audio transducers like speakers, but it is sufficient for many signaling and alerting purposes.
• Drive Circuitry: Most piezo buzzers require a simple drive circuit, often a square wave generator, to create an audible sound.
• Durability: Piezo buzzers are robust and have a long operational life. They are less susceptible to wear and tear compared to traditional electromagnetic buzzers.
• Waterproof Variants: Waterproof piezo buzzers are available, making them suitable for outdoor or wet environments.