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A piezo buzzer contains a piezoelectric element combined with an in-built oscillator / driver to produce an audible sound. While the output frequency is fixed using them is as simple as applying a DC voltage within the specified range.

-2 votes
1 answer
2k views

What is the cheapest way of producing audible sounds? [closed]

I am in need of producing an audible sounds in my circuit, when instructed by a microcontroller which it is attached to. So far, the cheapest way I have found is to use a piezoelectric style buzzer, b …
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7 votes
3 answers
7k views

Piezoelectric Sensor and the ADC

I would like to hook up a piezoelectric sensor to my ATmega8 microcontroller via its ADC. The reason being is that I would like to use the sensor as a force sensor. I noticed that the harder I press …
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