Stepper motor basics in Arduino - Mini Project: Build & Apply

Stepper motor basics

📖 Scenario: You want to control a stepper motor to turn it a certain number of steps. Stepper motors move in small steps, so you can control their position precisely. This project will help you write a simple Arduino program to move the motor forward and backward.

🎯 Goal: Build an Arduino program that moves a stepper motor 100 steps forward and then 100 steps backward using the Stepper library.

📋 What You'll Learn

Use the Arduino Stepper library

Create a Stepper object with 200 steps per revolution

Set the motor speed to 60 RPM

Move the motor 100 steps forward

Move the motor 100 steps backward

Print messages to the Serial Monitor when moving

💡 Why This Matters

🌍 Real World

Stepper motors are used in 3D printers, CNC machines, and robotics where precise control of movement is needed.

💼 Career

Understanding how to program stepper motors is important for embedded systems engineers and robotics developers.

1

Set up the Stepper motor object

Include the Stepper library and create a Stepper object called myStepper with 200 steps per revolution connected to pins 8, 9, 10, and 11.

Arduino

# Include the Stepper library and create the Stepper object
// Your code here

Hint

Use #include <Stepper.h> to include the library. Then create Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11); after defining stepsPerRevolution.

2

Set motor speed and initialize Serial

In the setup() function, set the motor speed to 60 RPM using myStepper.setSpeed(60); and start the Serial communication at 9600 baud with Serial.begin(9600);.

Arduino

#include 

const int stepsPerRevolution = 200;
Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11);

void setup() {
  // Set motor speed and start Serial communication
  // Your code here
}

void loop() {

}

Hint

Inside setup(), call myStepper.setSpeed(60); and Serial.begin(9600);.

3

Move the motor forward and backward

In the loop() function, first print "Moving forward" to Serial, then move the motor 100 steps forward using myStepper.step(100);. Next, print "Moving backward" to Serial, then move the motor 100 steps backward using myStepper.step(-100);.

Arduino

#include 

const int stepsPerRevolution = 200;
Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11);

void setup() {
  myStepper.setSpeed(60);
  Serial.begin(9600);
}

void loop() {
  // Print "Moving forward" and move 100 steps forward
  // Print "Moving backward" and move 100 steps backward
  // Your code here
}

Hint

Use Serial.println() to print messages and myStepper.step() to move the motor steps.

4

Display motor movement messages

Upload the program and open the Serial Monitor. The output should show Moving forward and Moving backward messages repeatedly as the motor moves.

Arduino

#include 

const int stepsPerRevolution = 200;
Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11);

void setup() {
  myStepper.setSpeed(60);
  Serial.begin(9600);
}

void loop() {
  Serial.println("Moving forward");
  myStepper.step(100);
  Serial.println("Moving backward");
  myStepper.step(-100);
  // Observe the Serial Monitor output
}

Hint

Open the Serial Monitor at 9600 baud to see the messages printed repeatedly.