Piezo buzzers are one of the commonly used buzzers in modern electronic devices. In summary, piezo buzzers convert electrical energy into mechanical energy, which eventually generates sound. In this article, we will discuss everything you need to know about piezo buzzers.

What are Piezo Buzzers?

Piezo buzzers are called so because of its core component - the piezoelectric element. It is a specific type of material that can generate an electric charge when mechanical stress is applied or vice versa. Hence, a piezo buzzer consists of two components - piezoelectric ceramic and metal plate - that generate sound by vibrating when AC voltage is applied.

Structure of Piezo Buzzers

Piezo buzzers have a compact design and consist of a diaphragm, a piezoelectric element (made of piezoelectric ceramic), and a metal plate. The piezoelectric element and the metal plate are held together by adhesive, and the diaphragm acts as the sound diffuser.

Working Principle of Piezo Buzzers

As mentioned before, a piezo buzzer generates sound when AC voltage is applied across the piezoelectric ceramic, which results in the ceramic's expansion and contraction. This process makes the metal plate vibrate, which further makes the diaphragm vibrate, causing sound waves to propagate.

Applications of Piezo Buzzers

Piezo buzzers are widely used in various electronic devices, including timers, alarms, medical devices, automotive electronics, and electronic toys. They are also used as sensors in musical instruments such as guitars and drums for sound detection.

Projects with Piezo Buzzers

Piezo buzzers are perfect for DIY projects such as building a doorbell or an electronic safe. They could also be used in microcontroller-based projects in which an alarm or warning sound is required.

Where to Buy Piezo Buzzers

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