![]() NPN transistor: Because we want to turn the active or passive buzzer on by setting the digital pin of the microcontroller HIGH.In my case I use the IRLZ44 NPN MOSFET as low-side transistor to control the buzzer. The solution is to use a transistor and divide between the control signal and the power consumption. But if we want to use magnetic buzzers with a current consumption higher than 20mA we have to find a different power supply than the digital I/O pin of the microcontroller. ![]() A ring or beep or click indicates that a switch has been pushed.Piezo buzzer have a current consumption lower than 20mA and could therefore be powered by Arduino microcontroller as well as the ESP32. This buzzer works through an audio signal source or oscillating circuit. It is an electromechanical, electromagnetic, mechanical, piezoelectric, electro-acoustic audio signaling device. Thus, this is all about an overview of a buzzer data sheet that includes its working principle, pin configuration, specifications, circuit, advantages, disadvantages & its applications. The applications of the buzzer include the following.
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