int pot;
int setpoint = 500;

void setup() {
  Serial.begin(9600);
  pinMode(3, OUTPUT);
}

void loop() {
  pot = analogRead(A1);
  Serial.print(pot);
  Serial.print("  ");  
  Serial.println(setpoint);
  if(pot>setpoint){
    digitalWrite(3, HIGH);
  }
  else{
    digitalWrite(3, LOW);
  }
  delay(10);
}