I have a KY-006 buzzer at home which works fine. I would like to solder it off the PCB and put it on my own board. I still couldn't figure out the following though:
Usually you leave the VCC pin (middle pin) free. I found some wiring plots though especially for raspberry where this pin is connected though. Why is this? What does this do?
How is the wiring on the pcb itself? (can not see it properly) It looks like the buzzer has only 2 pins. On the PCB are no other electronic parts, so it simply does not make much sense to me. Maybe I have overlooked something?
Thanks a lot!