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Schematic diagram to explain the buzzer

2017-08-16 20:50  
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This article is a schematic diagram to explain the buzzer . The combination of text read schematics would be more effective to grasp this principle. This circuit produces a sound like a pager pager produces a "beep beep beep" sound. Basic circuit consists of a 555 timer oscillator is turned on and off periodically. The first integrated circuit (left) at the 1 Hz oscillator. The second IC is the first circuit open and close. The first decision to fast second IC integrated circuit on / off and a second IC determines the tone of the final output. By changing the VR1, conversion rate can be adjusted. By changing the VR2 tone can be adjusted. If you know something about electronics, you can try replacing the second 555 IC circuit with a piezoelectric buzzer. This saves one IC and associated components but can not give a loud buzzer sound and tone spokesman could not change. If you are the first to understand this principle, we might Duokanjibian. The principle is simple but effective.

Beeper circuit diagram

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