If you’re at a dance or somewhere crowded, how do you alert the masses without causing a panic?
This project uses interrupts to stop a melody and buzzes, slowly increases in pitch to gain people’s attention. In future iterations, the device could sense when room is quiet the switch to playing the message that was needed to get everyone’s attention.
Proof of Concept
I used the potentiometer to control the speed of the melody and the buzzer intervals.