Interfacing Servo Motor with Arduino

1#include <Servo.h>
2Servo servomotor;
3int a = 0;
4
5void setup()   {
6  servomotor.attach(3);
7  Serial.begin(9600);             // Serial  
8   while(!Serial);                                           
9  Serial.println("Servor   Mortor");
10}
11
12void loop() {
13  if(Serial.available()){        // Serial      
14    a = Serial.parseInt();       // Serial    a  
15    if(a>=0 && a<=180)
16     {
17      Serial.print("angle : ");
18      Serial.println(a);
19      servomotor.write(a);
20       delay(15);
21    }
22  }
23}
24

1#include <Servo.h>
2Servo servomotor;
3int a = 0;
4
5void setup()  {
6  servomotor.attach(3);
7  Serial.begin(9600);             // Serial  
8  while(!Serial);                                           
9  Serial.println("Servor  Mortor");
10}
11
12void loop() {
13  if(Serial.available()){        // Serial     
14    a = Serial.parseInt();       // Serial    a  
15    if(a>=0 && a<=180)
16    {
17      Serial.print("angle : ");
18      Serial.println(a);
19      servomotor.write(a);
20      delay(15);
21    }
22  }
23}
24

1#include <Servo.h>  // add servo library
2 
3Servo myservo;  // create  servo object to control a servo
4 
5int potpin = 0;  // analog pin used to connect  the potentiometer
6int val;    // variable to read the value from the analog pin
7  
8void setup() {
9  myservo.attach(3);  // attaches the servo on pin 3 to the  servo object
10}
11 
12void loop() {
13  val = analogRead(potpin);            //  reads the value of the potentiometer (value between 0 and 1023)
14  val = map(val,  0, 1023, 0, 180);     // scale it to use it with the servo (value between 0 and  180)
15  myservo.write(val);                  // sets the servo position according  to the scaled value
16  delay(15);                           // waits for the servo  to get there
17}
18