wireless monitoring system of gas detector - Faculty of Electrical ...

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2.5.1 Buzzer
Figure 2.10: Buzzer model
Buzzer as shown in Figure 2.11 is an audio signaling device. The typical uses of
buzzers are for alarms, timers and confirmation of user input such as a mouse click or
keystroke. The project used an electronic type of buzzer which is a piezoelectric element
that driven by an Arduino microcontroller signals.