int potpin=1;// initialize analog pin 0
int ledpin=10;// initialize digital pin 3
int val=0;// define val, assign initial value 0 
void setup() {
  pinMode(ledpin,OUTPUT);// set digital pin as “output”
  Serial.begin(9600);// set baud rate at 9600
}
void loop() {
  val=analogRead(potpin);// read the value of the sensor and assign it to val
  int ledPower = map(val, 0, 1023, 0, 255);
  Serial.print("ADC: ");// display text "ADC: "
  Serial.print(val);// display the value of val
  Serial.print(" | PWM: ");// display text " | PWM: "
  Serial.println(ledPower);// display the value of ledPower
  analogWrite(ledpin, ledPower);// set up brightness（maximum value 255）
  delay(10);// wait for 0.01
}