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How to make a fire alarm using battery 9v simply

by Earth Bondhon | Feb 6, 2019 | Electronic Project | 0 comments

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...
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