Arduino Servo Motor

Arduino Servo Motor
Arduino Servo Motor

Have you ever wanted to use Arduino Servo Motor to produce a robot arm wave or other moving part? Servos solve it! These little motors allow projects spin and rotate practically anywhere. You may quickly add mechanisms and motion to your electronics projects using a servo, power source, and code. This article explains how servos operate, how to connect them, and how to program your Arduino to move them. Start with sweeping a servo, then move on to controlling many ones. We’ll teach you how to use Arduinos, whether you’re a beginner or an expert. Start moving!

An Introduction to Servos and How They Work

Servo motors rotate precise positions. Instead of spinning constantly, servos use control circuitry to move and keep an angle. They power moving parts of robotics, RC vehicles, and other mechanical applications well.

How do servers work?

Compact servos feature a motor, gearing, position sensor, and control circuitry. The position sensor, generally a potentiometer, measures servo arm angle. The control circuitry drives the motor and gearing to swing the arm to the correct angle by comparing the sensed location to your input. This is a “closed loop” system since it monitors and corrects position to attain the aim.

Controlling a Servo

Use an Arduino to provide pulse width modulation (PWM) signals to servos. Each servo has a pulse minimum, maximum, and repetition rate. The minimum pulse moves a conventional servo to 0 degrees, the maximum to 180 degrees, and the repetition rate is commonly 50 Hz. Changing the pulse width within this range lets you position the servo at any angle.

Some Uses for Servos

For robotics and interactive projects, servos are invaluable. Servo usage examples:

-Robot joint and limb control. Coordinating several servos lets a robot walk, grip, and move dynamically.

RC vehicle steering. Vehicle steering can be controlled remotely via servos.

Mechanisms for pan and tilt. Platform-mounted servos control vertical and horizontal rotation. Useful for laser pointers, security cameras, etc.

-Animatronics. Servo coordination gives animatronic creatures, characters, and costumes life.

Understanding servos and how they’re controlled will help you develop dynamic and interactive projects quickly! If you have more servo questions, let me know.

The Components You’ll Need for Your Arduino Servo Project

Several components are needed to start your Arduino servo project.

An Arduino Board

Easy servo control is possible with the Arduino Uno, a popular, affordable board. A microcontroller is needed to signal the servo.


A standard-size servo motor like the Hitec HS-311 is required. A servo converts electrical information into mechanical movement. They usually turn 180 degrees. You may buy servos online or at an electronics store.

Hookup Wires

It takes a few male-to-male jumper wires to connect the servo to your Arduino. This wire comes in multiple colors to color-code your connections.

Breadboard (Optional)

A breadboard allows solderless component connections. It’s beneficial when starting out, but not necessary if you attach the servo wires straight to your Arduino.

Power Supply (Optional)

A separate power supply can power several servos or other components. A 6V DC power source should suit most servos. A PC USB can power the Arduino separately.

Power (Red Wire)

These simple components will get you started controlling servos using Arduino. Once you understand the basics, you can find more advanced parts. Start small and enjoy! Search online or ask an expert maker for help if you get stuck. Arduino enthusiasts want you to succeed.

After reviewing your needs, start developing! Connecting components and writing code to control servos is the next stage. Let’s begin!

Arduino-Servo Connection
To connect a servo motor to Arduino, attach power, ground, and signal cables to the right pins.

Power (Red Wire)

The red wire powers your servo. Connect this to Arduino’s 5V pin. The USB cable or external power supply powers the 5V pin.

Ground (Brown Wire)

The brown ground wire completes the circuit and returns current. Connect this to an Arduino GND or ground pin.

Signal (Orange Wire)

Orange signal line informs servo where to move. Connect this to an Arduino digital pin like pin 9. The Arduino controls the servo with PWM pulses from this pin.

Upload the Servo Sketch

Upload a program to the Arduino to control the servo after connecting the hardware. Arduino includes various servo sketch examples. Use File > Examples > Servo to open Sweep. The servo will automatically move.

Adjusting the Servo Position

Use Servo.write() to manually position the servo. Example: To move the servo 90 degrees:

Servo myservo; // construct servo object for control int pos = 90; // save servo position myservo.write(pos); // set position

Servo angles range from 0 to 180 degrees. Adjusting the position controls your servo for robotics, automation, and interactive projects.

Wiring the power, ground, and signal wires and uploading a sketch connects a servo to an Arduino. With your servo linked, you can build interactive robots and devices quickly! Any additional Arduino servo questions? Let me know.

Controlling a Servo With Code

Selecting a Pin

Choose an Arduino pin to connect your servo to first. Servos require 5V power, therefore choose an Arduino Uno pin that can produce PWM signals, such as 3, 5, 6, 9, 10, and 11. Connect the servo’s red wire to the Arduino’s 5V pin, the brown wire to ground, and the yellow wire to your PWM pin.

The Servo Library

Next, add the Servo library to your code. Add this to your sketch’s top:

#include <Servo.h>

Create a Servo object and select its pin:

Int servoPin = 9; myServo.attach(servoPin); “` ### Setting Angle
Write() sets servo angle. To set it to 90 degrees, add:


Servo angles are 0–180. Zero degrees moves the servo to its minimum, 90 degrees to the middle, and 180 degrees to the maximum.

Negative angles can keep the servo rotating:

Code: myServo.write(-90);

The servo will rotate in one direction, and `myServo.write(90);` will produce the opposite rotation.
### Using Delays
To create pauses between servo angle adjustments, use “`delay();“` in your code. As an example:

In the code, myServo.write(0), myServo.write(90), and myServo.write(180) are all delayed by 1000.

This will move the servo to 0 degrees, pause for one second, then 90 degrees, pause again, then 180 degrees. Adjusting delay times lets you change servo speeds and create smooth sweeps.

Code-controlled servos allow Arduino projects to move and animate tangible items. Enjoy coding!

Fun Beginner Arduino Servo Projects to Try

Pan and Tilt Camera Mount

Pan and tilt camera mounts are fun servo projects to start with. Two servos, a camera platform, and a base are needed. Programming the Arduino to move the servos lets you pan, tilt, and more. This gives you great filming and monitoring freedom.

Robot Arm

Feeling ambitious? Robot arms are difficult but rewarding servo projects. It takes numerous servos to control the shoulder, elbow, wrist, and gripper. Program each servo’s movements and degrees of freedom to lift and move items. Start with a two-servo arm and progress as you learn.

Ping Pong Ball Launcher

Build an autonomous ping-pong ball launcher for fun. Attach two servos to a platform—one for left and right aiming and one for firing strength. Put a ping pong ball in the launcher, adjust the Arduino angles and power, and fire! Aim toward objectives for thrill. Shoot something that won’t damage anyone!

Sensor-Guided Car

After mastering servos, build a sensor-guided vehicle. Attach two servos to a miniature car, craft, or robot’s wheels. Install infrared or ultrasonic rangefinders to detect impediments. Set your Arduino to read sensors and move servos to avoid obstacles. This sophisticated project teaches servo integration with robotic control systems. Starting small and building up is crucial to success with these tasks. Fun is what Arduino and servos are about! You can move and liven up practically anything with inventiveness.


In conclusion, Arduino servos are entertaining and straightforward to use. Your next project can wave, spin, or turn just a few lines of code. Servos allow your Arduino to interact with the world by building a robot arm, moving a sensor to detect items, or animating an art project. Movement opens up unlimited possibilities! So connect a servo to your Arduino and start making projects. Moving them will make them more exciting.

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