Some uses of Piezo Buzzer: e.g clock alarm, alarms, car/truck reversing indicator, bells, timers etc. So we see that this element is used on a wide area of electronic devices. Our schematic consists ...

While we normally see piezo elements being used to output audio ... after which it is fed into an Arduino Mega. The seismic data is then pushed up to his Pachube account for storage, though ...

After plucking out a piezo element he grabbed a bag of Junction gate Field-Effect Transistors (JFET) and built a preamp circuit around one of them. JFETs operate in much the same way as MOSFETs ...