#Servo motor arduino tutorial full

#Servo motor arduino tutorial full

Find out more hereĪnd thats all the code you need to control the servo however you want! However, if your realized that your servo motor is not rotating the full range of motion of 180 °, you might need to calibrate your servo at the next step.

servoMotor.write(0) : Sends a signal to the motor to go to the 0 ° position.

servoMotor.attach(servoPin) : Tells the library which output pin on the Arduino to associate with the servoMotor object.

Servo servoMotor : Creates a Servo object called servoMotor.

#include : Imports the Servo library to easily interface with the servo motor.

Let's go through some key lines of code used. To control the servo motor, we can use Arduino's built-in Servo library. Here we have written some code to make the servo motor turn to the 0 ° position, wait for 3 seconds, turn to the 18 0 ° position, wait for 3 seconds and repeat the process. On the Mega, if more than 12 servos are used, the PWM functionality will be disabled on pins 11 and 12. NOTE: On Arduino boards other than the Mega, the use of the Servo Library will disable the PWM functionality on pins 9 and 10. Just make sure that the signal pin of the servo motor is connected to an output pin of the Arduino capable of pulse width modulation (PWM). I used an Arduino Mega here, but any other Arduino would work fine.

(usually yellow, orange or white)Ī typical connection to an Arduino is shown below: Let's get started!Ĭommon servo motors such as the SG90 servo and the MG90S servo come with a connector with 3 pins, one for connection to a 5V DC power source (usually red), one for connection to ground (usually black or brown) and the last one for controlling the position of the servo arm. Give this project a try for yourself! Get the BOM.Need to move something in your project? Add a servo motor! In this tutorial we will cover the basics of controlling a servo motor and some tips on calibrating your servo motor to get the full range of motion. Int potentio = A0 // initialize the A0analog pin for potentiometerĪngle = analogRead(potentio) // reading the potentiometer value between Īngle = map(angle, 0, 1023, 0, 179) // scaling the potentiometer value to angle value for servo between 0 and 180) Once the program is started, rotating the potentiometer should cause the shaft of the servo motor to rotate. Potentiometer pin 2 – Analog In (A0) pin Arduino.Potentiometer pin 3 - Ground pin Arduino.Hardware RequiredĬonnect the circuit as show in the figure below: The Arduino will read the voltage on the middle pin of the potentiometer and adjust the position of the servo motor shaft. This experiment is essentially the same as Experiment 1, except that we have added a potentiometer for position control. Servo_test.write(angle) //command to rotate the servo to the specified angle Servo_test.attach(9) // attach the signal pin of servo to pin9 of arduinoįor(angle = 0 angle =1 angle-=5) // command to move from 180 degrees to 0 degrees Servo servo_test //initialize a servo object for the connected servo When the motor has rotated 180 degrees, it will begin to rotate in the other direction until it returns to the home position. When the program starts running, the servo motor will rotate slowly from 0 degrees to 180 degrees, one degree at a time. Connect to the motor to the Arduino as shown in the table below:Ĭaution: Do not try to rotate the servo motor by hand, as you may damage the motor.

The best thing about a servo motor is that it can be connected directly to an Arduino. The PWM input will be connected to one of the Arduino's digital output pins. In this experiment, we will connect the power and ground pins directly to the Arduino 5V and GND pins.

Most servo motors have the following three connections: Servo motors are small in size, and because they have built-in circuitry to control their movement, they can be connected directly to an Arduino. As a result, servo motors are used to control the position of objects, rotate objects, move legs, arms or hands of robots, move sensors etc. You can connect small servo motors directly to an Arduino to control the shaft position very precisely.īecause servo motors use feedback to determine the position of the shaft, you can control that position very precisely.