A demo of controlling the loudness of a piezo buzzer with a potentiometer

buzer_pot.ino

/* FILE NAME
button.py
1. WHAT IT DOES
Reads the value of a potentiometer and controls the loudness of a piezo buzzer via pwm

2. ORIGINAL WORK
Raspberry Full stack 2015, Peter Dalmaris

3. HARDWARE
D11: piezo buzzer
A0: potentiometer

*/

void setup()
{
Serial.begin(9600);
}

void loop()
{
int knobValue = analogRead(A0);
byte pwm = map(knobValue,0,1024,0,125);
Serial.print(knobValue);
Serial.print("-");
Serial.println(pwm);
analogWrite(11, pwm);

delay(1);
}