The Arduino controls the buzzer, determining when it should activate and for how long. This audio alert is particularly useful for grabbing attention in noisy environments or when visual alerts might ...

Arduino project, buzzer trouble. mogbert Jul 14, 2014 Jump to latest Follow Reply ...

Circuit Diagram Connect the piezo buzzer's positive lead to pin 8 on the Arduino and the negative lead to the GND. Connect the green LED's anode (longer leg) to pin 12 through a resistor (220Ω is ...