PicoMite: driving a passive buzzer

Author	Message
thwill Guru Joined: 16/09/2019 Location: United Kingdom Posts: 4090	Posted: 04:24pm 28 Nov 2022         Volhout said   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)