#4.2.2.1. 예제 

int sensorValue;

int outputValue;

void setup() {

pinMode(A0, INPUT);

pinMode(9, OUTPUT);

Serial.begin(9600);

}

void loop() {

sensorValue = analogRead(A0);

outputValue = map(sensorValue, 0, 1023, 0, 255);

analogWrite(9, outputValue);

Serial.print("sensor = ");

Serial.print(sensorValue);

Serial.print("\t output = ");

Serial.println(outputValue);

delay(2);

}