How to Run a Stepper Motor with an Arduino + L293D IC

Hi Guys

This article is about something every electronics enthusiast would want to learn and master. Its name might sound really simple but mind you, this thing has the power to solve many complicated problems. Yes, I’m talking about the Stepper Motor Controller – a device which is being used excessively in the world of electronics these days. From DSLR auto-focus systems & 3D printers to plotter rigs and CNCs, you will find SMCs (stepper motor controllers) in almost all types of electro-mechanical equipments & systems.

The main reason why stepper motor controllers are used so often is because they can be programmed to move precise & defined steps either in the clockwise or in the counter-clockwise direction.

In this article, through a basic prototype, I am going to teach you that how you can drive a stepper motor. I will also explain that how you can connect a stepper motor to a microcontroller to programme it.

So here’s the stuff I am going to be using for prototyping:

  1. Arduino UNO
  2. Bipolor stepper motor
  3. Jumper wire
  4. Breadboard
  5. Breadboard jumper
  6. L293D IC

First you can make the same prototype to start learning & tinkering. I have also added the Arduino code below for testing purposes. You can watch the below video for a descriptive step-by-step guide to create the stepper motor controller.

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And here is the circuit diagram for further reference. Before you connect your microcontroller and circuit to the power source, just make sure all connections are according to the circuit diagram.

 

Arduino Stepper Motor controller

 

Ok, now it’s time to upload the programme into Arduino and test the project. Here is the code.

/*
CircuitMagic.com
*/

#include <Stepper.h>

int in1Pin = 12;
int in2Pin = 11;
int in3Pin = 10;
int in4Pin = 9;

// change this to the number of steps on your motor
#define STEPS 512

Stepper motor(STEPS, in1Pin, in2Pin, in3Pin, in4Pin);  

void setup()
{
  pinMode(in1Pin, OUTPUT);
  pinMode(in2Pin, OUTPUT);
  pinMode(in3Pin, OUTPUT);
  pinMode(in4Pin, OUTPUT);

  // this line is for Leonardo's, it delays the serial interface
  // until the terminal window is opened
  while (!Serial);
  
  Serial.begin(9600);
  motor.setSpeed(20);
}

void loop()
{
  if (Serial.available())
  {
    int steps = Serial.parseInt();
    motor.step(steps);
  }
}

Found it useful? Anything you like & dislike? I’ll be happy to reply to your comments!

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9 Comments
  1. bilel 2 years ago

    thx for your tuto but i ask if can i use a stepper little more big with L293D

  2. henrique 2 years ago

    the power input for motor is shorting out in the diagram

  3. sabbir 2 years ago

    can i used arduino mega for this project???

  4. Navjot 2 years ago

    Could we use a transistor to power motors with a higher voltages? say 12v / 24v motors, like NEMA17.
    Thanks.

  5. jigar-buddhadeo 10 months ago

    Can you help in writing the same program for matlab. I have interface my arduino mega2560 with matlab using matlab support package. Can you write the code to run the same.

  6. Anijith 9 months ago

    This is very helpful..Thanks

  7. Avadhut Kulkarni 8 months ago

    what are the changes in program if I want to rotate a stepper motor first 120 degree anticlockwise then 120 anticlockwise and the 240 degree clockwise?

  8. Akhil Rastogi 8 months ago

    Hi
    Can I have your email I’d

  9. Frantisek 3 months ago

    Power input motor 🙂 short circuit man!

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