/*
 * Original code from File->Examples->Servo->Knob
 * 
 * This is Arduino code to use one potentiometer (variable resistor) to control multiple servo motors
 * Please watch video instruction https://youtu.be/QB49Rmc96Ho
 * Updated from original code by 
 * Ahmad Shamshiri on October 27, 2020 at 23:01 in Ajax,
 * Ontario, Canada 
 * www.robojax.com
 * 
 Controlling a servo position using a potentiometer (variable resistor)
 by Michal Rinott <http://people.interaction-ivrea.it/m.rinott>

 modified on November 8, 2013
 by Scott Fitzgerald
 http://www.arduino.cc/en/Tutorial/Knob

 * Get this code and other Arduino codes from Robojax.com.
Learn Arduino step by step in a structured course with all material, wiring diagrams, and libraries
all in one place. 

If you found this tutorial helpful, please support me so I can continue creating 
content like this. 

or make a donation using PayPal http://robojax.com/L/?id=64

 *  * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.* 
 * This code has been downloaded from Robojax.com
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#include <Servo.h>

Servo myservo1;  // create servo 1 object to control a servo
Servo myservo2;  // create servo 2 object to control a servo
//Servo myservo3 //create servo 3 object 

int potpin = A0;  // analog pin used to connect the potentiometer
unsigned int servoPin[]={5,6};//watch video for details https://youtu.be/QB49Rmc96Ho
int val;    // variable to read the value from the analog pin

void setup() {
  Serial.begin(9600);
  Serial.println("Multiple Servo");
  Serial.println("Robojax.com");
  myservo1.attach(servoPin[0]);  // attaches the servo 1  to the servo object
  myservo2.attach(servoPin[1]);  // attaches the servo 2  to the servo object  
  //add line for more servos  watch video for details https://youtu.be/QB49Rmc96Ho
}

void loop() {
  //watch video for details https://youtu.be/QB49Rmc96Ho
  val = analogRead(potpin);            // reads the value of the potentiometer (value between 0 and 1023)
  val = map(val, 0, 1023, 0, 180);     // scale it to use it with the servo (value between 0 and 180)
  myservo1.write(val);  
  myservo2.write(val); 
  
  Serial.print(val);  
  Serial.println();    
  // sets the servo position according to the scaled value
  delay(20);   // waits for the servo to get there
  //robojax.com code //watch video for details https://youtu.be/QB49Rmc96Ho
}