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These buzzers can be used alert a user of an event correspondingto a switching action, counter signal or sensor input. They are also used in alarm circuits. The buzzer produces a same noisy sound irrespective of the voltagevariation applied to it. Aug-12 13. 13 It consists of piezo crystals between two conductors. When a potential is applied across these crystals, they push on oneconductor and pull on the other. This, push and pull action, results in a sound wave. Most buzzersproduce sound in the range of 2 to 4 kHz. The Red lead is connected to the Input and the Black lead isconnected to Ground. Aug-12 14. 14 CAPACITOR Capacitor is a widely used electronic component. It stores electriccharge and then discharges it into the circuit. It blocks the direct current and allows the alternating current topass through it. A capacitor contains two conductor plates which are generallymade of metal and an insulator between them. The two plates are electrically connected to the external circuitwith the help of two thin metal rods also known as the legs of thecapacitor.
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