Piezo Electric Buzzers
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Piezoelectric buzzers are commonly used and every user is aware of it but still we have given a description for user’s convenience. Piezoelectric buzzers are electronic devices used to produce audio signal i.e. sound. They are light weighted and compact. They are compatible to many devices and cost very low. Its massive applications can be seen in alarm devices, timers, cars, trucks, computers, mobile phones and many more.
Buzzer applications can be seen in variety of fields including educational purposes, electronic metronomes, microwave ovens, household appliances, electrical alarms, sporting events, electrical alarms, joy buzzer, annunciator panels and game show lock out device.
Buzzers are easily embedded into the PCB. Buzzer has two wires red and black, in which black denotes ground. To produce sound, oscillating voltage is applied. Buzzer has a case composed of plastic in which piezo disc which produces sound. It can be only taken out of its case when used as sensor.
To connect buzzer, additional leads are connected and embedded on the breadboard for testing. Interfacing with the arduino is easily possible by connecting the buzzer pins with it. Piezo electric buzzer material is of ceramic class which makes the disc and further produces sound. When an ac current is passed, frequency varies and thus produces sound. This is the simple phenomena which is used and explained in detail.
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