开云体育

Hello,

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Lately, I needed to add an external piezoelectric buzzer to the internal ringer of my (bell) phone.

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I found, in the group’s archive, a circuit of Piezoelectric Buzzer, BuzFB.asc , made by analogspiceman - Aug 2012. Based on it, I made a model whose supply current is close to the one of a buzzer module I have. I added it, BuzzerModule.zip, to the group’s archive (though in the ’Temp folder’) as a subcircuit; BuzzerModule.asc + its symbol, BuzzerModule.asy (which is just a small box with 2 pins, IN+ and IN-).

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For instance, I built, for my ear, the low-voltage amplifier using TDA2822 (with a small electret micro and an NPN BJT pre-amp). Fortunately, it works as expected.

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Kerim

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