Lesson 107: Control Stepper motor 28BYJ-48 with ULN2003 for Arduino, 7 Projects

Please select other codes for this lecture from the links below.

Part 10: Stepper Motors

In this lesson we learn how to use mini stepper motor 28BYJ-48 for our project. I am presenting with 8 projects so you can use it in almost any applicaiton. In the video, I have explained the code, shown full wiring diagram and how connect the wires, push buttons and bread board.

Projects

Project 1: Running motor
Project 2: Controlling stepper motor from Serial Monitor
Project 3: Controlling stepper motor using push button STPB-1
Project 4: Controlling using push button STPB-2 keep pressing
Project 5: One Revolution using push button STPB-3
Project 6: Push button Any Angle and speed STPB-4<
Project 7: ush multiple buttons to any angles STPB-5 angle, speed and direction (this project)
Project 8: Controlling stepper motor using potentiometer

In Project 7 STPB-5 we control stepper motor using push buttons. We can have many push buttons for different angle. Just push and motor goes to that angel. The angles and seped are set int code . See video for details and demonstration.

Timing of chapters in the video

00:00 Start
02:03 Introduction to stepper motor
07:40 How motor is controlled
13:08 Wiring explained
15:43 Project 1 code
20:12 Project 1 demonstration
22:23 Project 2: Controlling motor via Serial Monitor
32:03 Project 2 Demonstration
43:13 Project 3: Controlling using push button STPB-1
35:48 Project 3: Wiring explained
37:45 Project 3: Code explained
39:59 Project 3: Demonstration
41:07 Project 4: Controlling using push button STPB-2 keep pressing
42:29 Project 4: Wiring
45:31 Project 4: Code
49:38 Project 4: Demonstration
51:20 Project 5: One Revolution using push button STPB-3
52:15 Project 5: Wiring
55:40 Project 5: Code
1:03:30 Project 5: Demonstration
1:05:48 Project 6: Push button Any Angle and speed STPB-4
1:07:43 Project 6: Wiring
1:11:04 Project 6: Code
1:17:34 Project 6: Demonstration
1:20:18 Project 7: Push multiple buttons to any angles STPB-5 angle, speed and direction
1:21:40 Project 7: Wiring
1:25:35 Project 7: Code
1:32:43 Project 7: Demonstration
1:39:24 Project 8: Controlling Stepper Motor using potentiometer
1:40:58 Project 8: Wiring
1:44:04 Project 8: Code
1:53:19 Project 8: Demonstration


 /*
* Lesson 107-6: Controlling stepper motor using 3 push buttons STPB-4. 
STPB-4 we control stepper motor using three push buttons. One push button for CW (fixed angle and speed) and other for CCW  (fixed angle and speed) and one for stopping it. The angles are set int code .
See video for details and demonstration. 

In this lesson we learn how to use mini stepper motor 28BYJ-48 for our project. I am presenting with 8 projects
  so you can use it in almost any applicaiton. In the video, I have explained the code, shown full wiring diagram and 
  how connect the wires, push buttons and bread board. 

  Project 2: we will push different keys on keyboard and control motor
 
 
  Project 1: Running motor 
  Project 2: Controlling stepper motor from Serial Monitor
  Project 3: Controlling stepper motor using push button STPB-1 
  Project 4: Controlling using push button STPB-2  keep pressing 
  Project 5: One Revolution using push button STPB-3
  Project 6: Push button Any Angle and speed STPB-4 
  Project 7: Using multiple buttons to any angles STPB-5 angle, speed and direction (this code)
  Project 8: Controlling stepper motor using potentiometer

  * Watch Video instrution for this code:https://youtu.be/TQ7R2bY-MWU
  * 
  * This code is part of Arduino Step by Step Course which starts here:  https://youtu.be/-6qSrDUA5a8
  * 
  * for library of this code visit http://robojax.com/
  * 
 If you found this tutorial helpful, please support me so I can continue creating 
 content like this. Make a donation using PayPal by credit card https://bit.ly/donate-robojax 
 
 * Written by Ahmad Shamshiri for Robojax Robojax.com
 * on Jun 09, 2020 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 code has been download from Robojax.com
     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/>.

 */


const int CW =1;
const int CCW =2;
const int STOP =3;

int Pin1 = 8;//IN1 is connected to 8 
int Pin2 = 9;//IN2 is connected to 9  
int Pin3 = 10;//IN3 is connected to 10 
int Pin4 = 11;//IN4 is connected to 11
int switchSTOP =2;//define input pin for STOP push button
int stopType=1;//1=normal stop, 2=hold stop (consumes power)

int speedFactor =1;//1=fastest, 2=slower or 3 more slower

long angles[] = {360, 270, 7655};//angles of each push button
int pushButtons[] ={3, 4, 5};//digial pin for each push button
int directions[] ={CW, CCW, CW};//direction of eacch push button
int speedFactors[] = {1, 1, 3};//speed for each push button


int correction_CW = 150;//watch video for details
int correction_CCW = 150;//watch video for details


int poleStep = 0; 
long stepVale =0;
const int SPR=64*64;
long goToAngle=0;
int activeButton=0;
int pole1[] ={0,0,0,0, 0,1,1,1, 0};//pole1, 8 step values
int pole2[] ={0,0,0,1, 1,1,0,0, 0};//pole2, 8 step values
int pole3[] ={0,1,1,1, 0,0,0,0, 0};//pole3, 8 step values
int pole4[] ={1,1,0,0, 0,0,0,1, 0};//pole4, 8 step values





int count=0;
int  dirStatus = STOP;// stores direction status 3= stop (do not change)

void setup() 
{ 
  //Robojax.com Stepper Push button Any Angle STPB-5
  Serial.begin(9600);
  Serial.begin("Robojax Video for Stepper Motor STPB-2");  
 pinMode(Pin1, OUTPUT);//define pin for ULN2003 in1 
 pinMode(Pin2, OUTPUT);//define pin for ULN2003 in2   
 pinMode(Pin3, OUTPUT);//define pin for ULN2003 in3   
 pinMode(Pin4, OUTPUT);//define pin for ULN2003 in4   

 pinMode(switchSTOP,INPUT_PULLUP); 
 attachInterrupt(digitalPinToInterrupt(switchSTOP), stopMotor, FALLING );
 // see this https://www.arduino.cc/reference/en/language/variables/utilities/sizeof/
 for (byte i = 0; i < (sizeof(pushButtons) / sizeof(pushButtons[0])); i++) {
   pinMode(i,INPUT_PULLUP);
  }


 
} //setup
 void loop() 
{ 
    stepVale = (SPR * goToAngle)/360 ;
  //Robojax.com Stepper Push button Any Angle STPB-5

  //see this https://www.arduino.cc/reference/en/language/variables/utilities/sizeof/
 for (byte i = 0; i < (sizeof(angles) / sizeof(angles[0])); i++) {
    if(digitalRead(pushButtons[i]) == LOW) 
    {
      goToAngle =angles[i];
      dirStatus =directions[i];
      count =0;
      activeButton =i;
    }// if ends
 }//for loop ends
  
  
 if(dirStatus ==CCW){ 
  
   poleStep++; 
   count++;   
   if(count+correction_CCW <= stepVale)
   {
    driveStepper(poleStep);      
   }else{
      stopMotor();  
   }
  //full explannation at Arduino Course on Udemy.com see link above
 }else if(dirStatus ==CW){ 
   poleStep--; 
   count++;   
   if(count+correction_CW <=stepVale)
   {
    driveStepper(poleStep);      
   }else{
      stopMotor();  
   }   
 }else{
  stopMotor();   
 }
 if(poleStep>7){ 
   poleStep=0;
 } 
 if(poleStep<0){ 
   poleStep=7; 
 } 
  delay(speedFactors[activeButton]);
  
  //Robojax.com Stepper Push button Any Angle STPB-5

}// loop


/*
 * @brief moves motor to specific angle 
 * @param "angle" is integer representing the angle
 * @return does not return anything
 * 
 * www.Robojax.com code Ap1il 19 2020 at 01:22 in Ajax, Ontario, Canada
 */
void driveStepper(int c)
{
    //Robojax.com Stepper Push button Any Angle STPB-5
     digitalWrite(Pin1, pole1[c]);  
     digitalWrite(Pin2, pole2[c]); 
     digitalWrite(Pin3, pole3[c]); 
     digitalWrite(Pin4, pole4[c]);

}//driveStepper ends here

/*
 * @brief stops the motor immediately
 * @param none
 * @return does not return anything
 * 
 * www.Robojax.com code June 09, 2020 at 11:09 in Ajax, Ontario, Canada
 */
void stopMotor()
{
  //see this https://www.arduino.cc/reference/en/language/variables/utilities/sizeof/
 for (byte i = 0; i < (sizeof(angles) / sizeof(angles[0])); i++) {
    digitalWrite(pushButtons[i], HIGH); 

 }//for loop ends
 dirStatus = STOP;
 if( stopType ==2)
 {
  driveStepper(8);
 }
}//stopMotor()

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