A0可變電阻去調led亮暗

 int sensor=A0;

int sensorRead=0;

int newdata=0;

void setup() {

  // put your setup code here, to run once:

Serial.begin(9600);

}

void loop() {

  // put your main code here, to run repeatedly:

sensorRead=analogRead(sensor);

newdata=map(sensorRead,0,1023,0,255);

Serial.println(newdata);

analogWrite(3,newdata);

delay(200);

}