I want to be able to switch a piezo buzzer with arduino without connecting it directly.
I have wired the following circuit I found on the internet:
The problem is that the voltage across the buzzer is very low (lower than 1v when I connect a voltmeter instead of the buzzer)
My guess is that I lack some basic understanding of how transistors operate. Maybe I chose the wrong transistor or I need to apply higher voltage between emitter and collector?