I have a temperature sensor that when the temperature is out of range, it will set a pin to +5v. I need to take that trigger and drive a 12Vbuzzer. Can someone help me design a simple way of using that trigger to drive the buzzer?
I was thinking to use an optocoupler to seperate the 5v side from the 12v of the circuit, but don't think i can run the higher amperage through the optocoupler.
I am a newbie, so speak slow...