We're complete beginners with Arduino and we're working on a project that moves a pointer based on a color sensor reading.

we used two servo motors each one performs a specific task the small servo works pretty fine. the problem is with the larger one

we used servo motor model: (towardpro MG996R). Arduino UNO and a color sensor

because the motor is large we connect it to a power supply 9v

but when we run the code it just vibrating in its place and the arm won't move :(

is there anything else we need to add to the circuit like a resistor or some thing!

HELP

#include <Servo.h>
Servo largeServo;

void setup() {
  // put your setup code here, to run once:
largeServo.attach(6);
 
largeServo.write(0); 
}

void loop() {
  // put your main code here, to run repeatedly:

  largeServo.write(0);
delay (2000);
largeServo.write(30);
delay (2000);
largeServo.write(60);
delay (2000);
largeServo.write(90);
delay (2000);
}

We're complete beginners with Arduino and we're working on a project that moves a pointer based on a color sensor reading.

We used two servo motors each: one performs a specific task, the small servo works pretty fine. The problem is with the larger one.

We used this servo motor model: (towardpro MG996R), Arduino Uno and a color sensor. Because the motor is large we connect it to a 9 V power supply.

But when we run the code it just vibrates in place and the arm won't move :(

Is there anything else we need to add to the circuit like a resistor or some thing?

#include <Servo.h>
Servo largeServo;

void setup() {
  largeServo.attach(6);
  largeServo.write(0); 
}

void loop() {
  largeServo.write(0);
  delay (2000);
  largeServo.write(30);
  delay (2000);
  largeServo.write(60);
  delay (2000);
  largeServo.write(90);
  delay (2000);
}