Passive buzzer 5V
A passive buzzer does not have a built-in oscillator, so it needs an AC audio signal to produce sound. It will make a “click” sound (like a relay) the moment you apply DC voltage to it. Passive buzzers have the advantage that they can vary the pitch or tone of the sound. So,you need a microcontroller like an Arduino to create an audible frequency for the buzzer. This is great if you want to create a chime or melody for a buzzer. This ability to produce a range of tones makes it useful for applications like intercoms, alarms, and musical effects.
Does what it is supposed to do, albeit a very soft sound on the esp. Was hoping for it to be a little louder.
Thanks for the review
The sound may be low on esp32 as the volts only give us 3,3V and not 5V for the buzzer that works better at this 5V input and the tone to it will also need to be closer to 3Khz for optimal sound pitch.
Try and use a PWM signal close to 2-4Khz and see if you don't get a better loader sound from it.
Any feedback will be helpful to us.