#include <Servo.h>

#define PIN_SERVO 9
#define PIN_CONTROL A3

int val;

Servo myservo;
int pos = 1;

void setup() {
  myservo.attach(9);
  pinMode(PIN_CONTROL, INPUT);
  Serial.begin(9600);
}

void loop() {
  val = analogRead(PIN_CONTROL);

  val = map(val, 0, 1023, 1, 180);
  val = constrain(val, 1, 180);

  myservo.write(val);

  Serial.println(val);
  delay(15);
}