What is the work of buzzer

Working Principle of Magnetic Buzzers. The moving disk during a magnetic buzzer is drawn to the pole by the field. once AN periodical signal is touched through the coil, it produces an unsteady field that vibrates the disk at a frequency up to that of the drive signal.

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Circuit Schematics

Components needed for this Project

You can get the components from any of the sites below:

• resistors with values between 100 ohms…[ Purchase This  Amazon  |  Aliexpress  ]
• Buzzer…………… [ Purchase This  Amazon  |  Aliexpress  ]
• BC547 ……………………………………….[ Purchase This  Amazon  |  Aliexpress  ]
• 1 LED……………………………………….[ Purchase This  Amazon  |  Aliexpress  ]