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Lesson 51: Control 2 DC motors using Arduino and L293D


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  • L293D Motor Driver Datasheet (pdf)
  • Part 5: DC Motors

    In this lesson we learn how to use L293D Motor driver to drive 2 DC motors using Arduino code to contorl motor in both direction. Please watch the video for full details.

    AliExpress.com Product - 5pcs/lot L293D L293 DIP-16 In Stock
    
     /*
    * Lesson 51: Controlling 2 DC motor using L293D and Arduino | Arduino Step By Step Course
    
     * This is the Arduino code L293 DC motor DRIVEER 
    Using this code you can control 2 motors to rotate in both directions
    Please watch the video for full details of this code and project:
    https://youtu.be/LkJRakZBChI
    
     *  * 
     // Writeen by Ahmad Shamshiri for Robojax.com on 
    // on Jan 26, 2019 at 08:01 in Ajax, Ontario, Canada
    
    This code is available at http://robojax.com/course1/?vid=lecture51
     
    with over 100 lectures Free On  YouTube Watch it here http://robojax.com/L/?id=338
    Get the code for the course: http://robojax.com/L/?id=339  
     * on Saturday November 24, 2018 
     * in Ajax, Ontario, Canada
     * 
     
     * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.* 
     * This program is free software: you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation, either version 3 of the License, or
        (at your option) any later version.
    
        This program is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.
    
        You should have received a copy of the GNU General Public License
        along with this program.  If not, see <https://www.gnu.org/licenses/>.
    
    */
    
    
    #define Pin1A 2 // define Pin1A 1A pin
    #define Pin2A 4 // define Pin2A 2A pin
    #define EN12 3 // define pin 3 for EN1, 2 (must be PWM pin)
    
    #define Pin3A 8 // define Pin3A 3A pin
    #define Pin4A 9 // define Pin4A 4A pin
    #define EN34 10 // define pin 10 for EN3,4 (must be PWM pin)
    
    const int CCW =1; // defining CCW variable
    const int CW =2; // defining CW variable
    
    
    void setup() {
      // L293 Motor Control Code 
      Serial.begin(9600);// setup Serial Monitor to display information
      pinMode(Pin1A, OUTPUT);// define pin as OUTPUT for Pin1A
      pinMode(Pin2A, OUTPUT);// define pin as OUTPUT for Pin2A 
      pinMode(EN12, OUTPUT);// define pin as OUTPUT for EN12
    
    
      pinMode(Pin3A, OUTPUT);// define pin as OUTPUT for Pin3A
      pinMode(Pin4A, OUTPUT);// define pin as OUTPUT for Pin4A 
      pinMode(EN34, OUTPUT);// define pin as OUTPUT for EN34  
    
      // L293 Motor Control Code    
    }
    
    void loop() {
      // L293 Motor Control Code 
    
      motor(1,255,CW);// motor 1 CW at 255
      delay(5000);// wait for 5 seconds
    
      motor(2,170,CCW);// motor 2 CCW at 150
      delay(5000);// wait for 5 seconds
      
      motor(1,0, CCW);// stop  1 motor
      delay(5000);// wait for 5 seconds
    
      motor(1,170,CCW);// motor 1 CCW at 255
      delay(5000);// wait for 5 seconds
    
      motor(2,255,CW);// motor 2 CW at 255
      delay(5000);// wait for 5 seconds
      
      motor(2,0, CCW);// stop  2 motor
      delay(5000);// wait for 5 seconds
             
      Serial.println("====== Loop done"); 
    
      // L293 Motor Control Code 
    }// loop end
    
    
    /*
     * drives L293D motor drivers
     * @param motor is motor number (1 or 2)
     * @param pwm is the PWM value 0 to 255
     * @param dir is the direction (CW or CCW)
     */
    void motor(int motor, int pwm, int dir)
    {
      int drive1Pin, drive2Pin, driveENPin;
      String motorTitle;// define motor text
      if(motor ==1){
        drive1Pin = Pin1A;
        drive2Pin = Pin2A;
        driveENPin = EN12;
        motorTitle ="Motor 1";
      }else{
        drive1Pin = Pin3A;
        drive2Pin = Pin4A; 
        driveENPin = EN34;
        motorTitle ="Motor 2";   
      }
      if(dir ==1){
        digitalWrite(drive1Pin,LOW);//LOW signal   
        digitalWrite(drive2Pin,HIGH);//HIGH signal  
        if(pwm ==0){
           Serial.print(motorTitle);
           Serial.println(" Stopped");
        }else{
           Serial.print(motorTitle);
           Serial.print(" Rotating CCW: "); 
           Serial.println(pwm);//print actual speed value     
        }       
      }else{
        digitalWrite(drive1Pin,HIGH);//HIGH signal   
        digitalWrite(drive2Pin,LOW);//LOW signal  
        if(pwm ==0){
           Serial.print(motorTitle);
           Serial.println(" Stopped");
        }else{
           Serial.print(motorTitle);
           Serial.print(" Rotating CW: "); 
           Serial.println(pwm);//print actual speed value     
        }       
      }
        analogWrite(driveENPin ,pwm);// send PWM to driveENPin 
         
    }//motor
    
    
    
    
    
    
    
       

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