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include <Servo.h>

int pos = 0;

int val_Adc = 0;

float volt = 0;

Servo servo_9;

void setup()

{

 servo_9.attach(9);

 Serial.begin(9600);

}

void loop()

{

 int val_Adc = analogRead(A0);

 volt=(val_Adc/1024.0)*5.0;

 int pos = (volt/5)*180;

 Serial.print(' ');

 Serial.println(pos);

 servo_9.write(pos);

 delay(15);

 }