Buzzer driver transformer

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Full-bridge driver with piezo buzzer load Resonant Piezo Transducer Drive Circuit. Yet another option for driving a piezo transducer is to create a circuit that utilizes the parasitic capacitance present in the transducer buzzer and a discrete inductor to form a resonant circuit. The use of a full bridge driver will cause a resultant increase in the sound volume of about 6 dB due to the doubling of the voltage applied to the transducer. Conclusion. Buzzers are a simple and inexpensive means of providing communication between electronic products and the user.  · It is possible that the transformer's secondary winding has a higher number of turns than the primary so that the buzzer gets a higher peak-to-peak voltage and sounds louder. In the presumed circuit from post #1, this function would be combined with the oscillator function (the transformer serves in the oscillator circuit and increases output voltage).

Figure 4: An example of a full-bridge buzzer driver. The final option to discuss is the resonant driver circuit (see Figure 5). Here a discrete inductor and the transducer buzzer’s own parasitic capacitance are utilised, with energy being built up and passed from one element to the other. A simple piezo transducer driver circuit or a simple piezo alarm circuit is shown in the following circuit using a NAND gate. Please note: The junction of the uF capacitor and the 33 K resistor needs to be connected to ground, which is mistakenly not indicated in the diagram. So please make sure to do this otherwise the circuit will not work. Hello all. I would like to receive clarification and opinions on driving bolt clamped (Langevin) piezoelectric transducers. These transducers are most abundantly found in ultrasonic cleaning equipment. The same transducers are also used in industrial tank, reservoir, and boat hull anti-fouling applications (this latter application is what I'm interested in). I have acquired transducers spec'd.

A speaker system, also often simply referred to as a "speaker" or "loudspeaker", comprises one or more such speaker drivers (above definition), an enclosure. Thus, a simple, inexpensive and compact alarm that does not use a transformer is desired. The sound output of the invention is amplified by using a logic. This circuit does not require an output transformer or an output coupling capacitor; the annunciator can easily be turned on or off by a control input.