Adafruit Piezo Buzzer

This compact piezo buzzer excels at producing beeps, tones, and alerts with surprising volume. It's designed for simplicity and efficiency, operating optimally with a 3-30V peak-to-peak square wave.

To function effectively, connect one pin to ground and the other to an output from a timer or microcontroller. For maximum volume, aim for around 4 KHz, though it performs admirably between 2 KHz and 10 KHz.

For situations demanding extra loudness, utilize both pins with a microcontroller, swapping pin states for a 'differential drive' to achieve double the volume. Ideal for creating clear and attention-grabbing sound signals.