Servo Motor

In this project, you'll learn how to connect and control a servo motor with the Arduino.

A servo motor is cappable of rotating half a circle in increments of one degree.

The servo library contains all of the functions for controlling the servo motor.

Parts needed:
  • Arduino
  • Servo motor
  • Wires
Servo motor     
1 Making the connections

The servo motor has three connection wires: brown, red and orange.
  • Connect the brown wire to GND.
  • Connect the red wire to 5V.
  • Connect the orange wire to pin 9.
Servo motor connections
2 Create a new program by selecting File from the menu
  • then select Examples
  • then select Basic
  • then select Bare Minimum
Type in the code on the right.

The #include <Servo.h> tells the computer to include the Servo.h library code.

The Servo command declares a myservo variable.

The attach command tells the computer that the servo motor is connected to pin 9.

The write command tells the servo motor to turn to the specified degree.
// need this for the servo motor
#include <Servo.h>
Servo myservo;

void setup() {
  myservo.attach(9);  // the servo motor is connected to pin 9

void loop() {
  myservo.write(0);   // turn the motor to 0 degree
  myservo.write(180); // turn the motor to 180 degree
3 Run the program and you should see the servo motor first turn to one side and then to the other side.