I'm experimenting with Piezo Buzzer. I connected it directly to PIN9 and GND. Worked well but quite. I'm trying to amplify it. I use external power source 12V and BC 237b transistor. This is how it looks http://img51.imageshack.us/img51/893/photovra.jpg . Unfortunately it doesn't work. Well.. it wo…

Using 12V for Piezo buzzer issue

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