unsigned long t=0;
void setup() {
  // put your setup code here, to run once:
  pinMode(A1 , INPUT); 
  pinMode(3 , OUTPUT); 
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  int PotContoler = analogRead(A1); 
  int angle = map(PotContoler, 0, 1023, 0, 180); 
  int rotation = map(angle, 0, 180, 500, 2500); 
  digitalWrite(3, HIGH);
   
  if(micros() > rotation + t){
    t=micros();
    digitalWrite(3, LOW); 
  }
}