Since I've no experience with buzzers, if there are any good ways to choose the right resistor and npn. By the way, I'm using STM32's MCU, supplied with 3V1 to drive a buzzer (GSC4417YA-16...
If it's possible to control the power output of a 12V/150W heating element using some sort of buck converter circuit. It should step down the 12V input to various voltages required to vary the out...
