\n
\n 
\n
\ncode: for Arduino uon , Arduino Nano
\n
\nconst int buzzerPin = 9;
\nvoid setup(){
\npinMode(buzzerPin, OUTPUT);
\n}
\n
\nvoid loop(){
\nanalogWrite(buzzerPin, 127);
\ndelay(500);
\nanalogWrite(buzzerPin,0);
\ndelay(500);
\n}
\n
\n