const int potPin = A0;
const int motorPin = 9;
int potValue;
int motorValue;
int minSpeedThreshold = 0; // Stall point

void setup() {
    Serial.begin(9600);
    pinMode(motorPin, OUTPUT);
}

void loop() {
    potValue = analogRead(potPin); // to read potentiometer from 0 to 1023
    motorValue = map(potValue, 0, 1023, 0, 255); // Mapping potentiometer value to motor speed (0 to 255)

    Serial.print("potentiometer = ");
    Serial.print(potValue);
    Serial.print(" motor = ");
    Serial.println(motorValue);

    // Controlling motor speed based on potentiometer value
    if (potValue > minSpeedThreshold) {
        analogWrite(motorPin, motorValue); // Setting motor speed
    } else {
        analogWrite(motorPin, 0); // stall motor
    }

    delay(500);
}