5PCs Piezo Piezoelectric Disc Sensor (27mm Dia.)

Description Piezo Ceramic disc, buzzer, diameter 27mm. Simply supply it with 5V power (or less than 25V), it will start vibrating, use another analog signal to control the power via Arduino, see how it looks in attached pictures. You can find many Piezo energy generator videos on youtube, like this one. Documentation see here.