Guru
Joined: 05/03/2018
Location: NetherlandsPosts: 4920
| Posted: 04:10pm 28 Nov 2022 |
The data from the Aliexpress page looks to specify a 2700Hz buzzer operated from 2-5Vdc pulling 40mA current. So you need not drive it from a PWM. It will generate 2700Hz if you connect it to 3.3V. And it will draw 40mA.
You only need a IO pin and a FET or transistor to drive it ON and OFF.
Quick check: connect + pin to 3.3V and - pin to GND... and shiver...
Driver circuit (will work with 5V and 3.3V)
Edited 2022-11-29 02:23 by Volhout