I am interested in the use of a microcomputer in a drive circuit for an external drive piezo buzzer. I was reading the FAQ page on the website of a piezo buzzer manufacturer
Under the heading "Please give me an example of the drive circuit for a Piezoelectric Sounder or a Piezoelectric Diaphragm (External Drive Type)." they said "Examples of typical drive circuits are broadly divided into case 1 where a transistor circuit is used and case 2 where the product is driven directly from a microcomputer." and gave the following image as an example.
I am a novice with electrical engineering and I am trying to understand exactly what components are needed in this external drive piezo buzzer drive circuit. The supplementary comments for this circuit diagram suggested people "consider connecting a Zener diode in parallel with the piezoelectric sound component and Rp if necessary." Based on this, my understanding is that the necessary components of this drive circuit are - the microcomputer, the diode, the resistor (Rp), the buzzer, and a power source.
Is this correct? Is it possible to build a drive circuit for a piezo buzzer with only these components, or do I something else?