Buzzer function
A buzzer contains a piezoelectric ceramic disc that is made through sintering zirconium, titanium, and lead oxide. When an audio signal is applied to the buzzer, it vibrates mechanically and produces sound. Buzzer types are typically divided into two-pin and three-pin configurations based on their pin structure. They are commonly used in air conditioners to indicate signal reception and can also serve as fault alarms. The symbol for a buzzer is shown below.
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