Control Servos with Potentiometers

Other Hardware Motors, Mechanics, Power and CNC
1

Hello,
I have used the code below to control a servo using a potentiometer. I need to now do the same but with multiple servos and potentiometers. I am using the ANALOG 0 and DIGITAL 9 PINS on the Arduino. I am very new to this and need help knowing what I need to and don't need to duplicate in the program. I need to do a total of 3 servos.

Thanks a lot!!
p.s. does anyone know how to power three servos separately from the arduino with a adapter they are rated 6v each. Let me know.

#include <Servo.h>

Servo arm; // create servo object to control a servo

int armpin = 0; // analog pin used to connect the potentiometer
int armval; // variable to read the value from the analog pin

void setup()
{
arm.attach(9); // attaches the servo on pin 9 to the servo object
}

void loop()
{
armval = analogRead(armpin); // reads the value of the potentiometer (value between 0 and 1023)
armval = map(armval, 0, 1023, 0, 179); // scale it to use it with the servo (value between 0 and 180)
arm.write(armval); // sets the servo position according to the scaled value
delay(15); // waits for the servo to get there
}

2

An array of pin numbers for the inputs and another one for the outputs would be a sensible approach:

#include <Servo.h>
 
Servo arm[3] ;  // create servo object to control a servo
 
int arm_pins [] = { A0, A1, A2 } ;  // analog pins used to connect the potentiometers
int servo_pins [] = { 9,  10, 11 } ; 

void setup()
{
  for (int i = 0 ; i < 3 ; i++)
    arm[i].attach(servo_pins [i]);  // attaches the servos to their pins
}
 
void loop()
{
  for (int i = 0 ; i < 3 ; i++)
    arm[i].write (map (analogRead (arm_pins [i]), 0, 1023, 0, 179)) ;
  delay(15);                           // waits for the servos to get there
}

(untested, but you get the idea)