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The novel buzzer circuit diagram

2017-08-03 07:05  
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The article describes a novel buzzer circuit. The circuit is very simple, very helpful. This novel  buzzer  circuit uses a relay in series with a small audio transformer and speaker. When the switch is pressed, the relay will operate through the transformer primary and closed relay contacts. When the relay is operating normally closed contacts open, remove power from the relay contacts close sequence repeat, very quickly ... so quickly, the main pulse of current fluctuations, so the transformer secondary. Speaker is therefore the relay operating frequency. Capacitor C can be used to "tune" the attention. University of Florida, the nominal values ??of 0.001, to increase the capacitance reduces the colony tone. After reading this article, you master the principle of not? 

 


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