int vcc=5;
int pinanalog=A2;
int potval;
float ledval;
void setup() {
  // put your setup code here, to run once:
pinMode(A2, INPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(vcc, HIGH);
  potval=analogRead(pinanalog);
  ledval=(255./1023.)*potval;
  Serial.println(potval);
  Serial.println(ledval);
  analogWrite(A3,ledval);
}