28BYJ-48 Motor; ULN2003AN driver

Using Arduino Motors, Mechanics, Power and CNC
1

Hello,

I have Arduino Uno, and 28BYJ-48 Stepper motor with a uln2003an driver.
I am new with the Arduino programming. It seems like I set up the connection between the software I have and the Arduino Uno.

Connection of pins:
On ULN2003An driver 1 through 4 is connected to Arduino Uno 8through 11.
Pin 5 is not connected, I am powering up the motor using a battery kronox, I looked through multimeter, it gives 6volts.

For now, I am trying to basically rotate my motor clockwise and after 5 seconds counterclockwise.

  1. I am not sure what kind of number is appropriate for motor speed. I am randomly using 5, which number would suite more?

I got an understanding on one code and edited it for my purpose.Does it make sense, please help me if anything doesn't make sense for you.

Here is my code:

//declare variables for the motor pins
int motorPin1 = 8; // Blue - 28BYJ48 pin 1
int motorPin2 = 9; // Pink - 28BYJ48 pin 2
int motorPin3 = 10; // Yellow - 28BYJ48 pin 3
int motorPin4 = 11; // Orange - 28BYJ48 pin 4

int motorSpeed = 5; //variable to set stepper speed

//////////////////////////////////////////////////////////////////////////////
void setup() {
//declare the motor pins as outputs
pinMode(motorPin1, OUTPUT);
pinMode(motorPin2, OUTPUT);
pinMode(motorPin3, OUTPUT);
pinMode(motorPin4, OUTPUT);
Serial.begin(9600);
}

//////////////////////////////////////////////////////////////////////////////
void loop(){

clockwise(); //make clockwise rotation
delay (5000); //delay for 5 seconds
counterclockwise(); //make counterclockwise rotation

}

//////////////////////////////////////////////////////////////////////////////
//set pins to ULN2003 high in sequence from 1 to 4
//delay "motorSpeed" between each pin setting (to determine speed)

void counterclockwise (){
// 1
digitalWrite(motorPin1, HIGH);
digitalWrite(motorPin2, LOW);
digitalWrite(motorPin3, LOW);
digitalWrite(motorPin4, LOW);
delay(motorSpeed);
// 2
digitalWrite(motorPin1, HIGH);
digitalWrite(motorPin2, HIGH);
digitalWrite(motorPin3, LOW);
digitalWrite(motorPin4, LOW);
delay (motorSpeed);
// 3
digitalWrite(motorPin1, LOW);
digitalWrite(motorPin2, HIGH);
digitalWrite(motorPin3, LOW);
digitalWrite(motorPin4, LOW);
delay(motorSpeed);
// 4
digitalWrite(motorPin1, LOW);
digitalWrite(motorPin2, HIGH);
digitalWrite(motorPin3, HIGH);
digitalWrite(motorPin4, LOW);
delay(motorSpeed);
// 5
digitalWrite(motorPin1, LOW);
digitalWrite(motorPin2, LOW);
digitalWrite(motorPin3, HIGH);
digitalWrite(motorPin4, LOW);
delay(motorSpeed);
// 6
digitalWrite(motorPin1, LOW);
digitalWrite(motorPin2, LOW);
digitalWrite(motorPin3, HIGH);
digitalWrite(motorPin4, HIGH);
delay (motorSpeed);
// 7
digitalWrite(motorPin1, LOW);
digitalWrite(motorPin2, LOW);
digitalWrite(motorPin3, LOW);
digitalWrite(motorPin4, HIGH);
delay(motorSpeed);
// 8
digitalWrite(motorPin1, HIGH);
digitalWrite(motorPin2, LOW);
digitalWrite(motorPin3, LOW);
digitalWrite(motorPin4, HIGH);
delay(motorSpeed);
}

//////////////////////////////////////////////////////////////////////////////
//set pins to ULN2003 high in sequence from 4 to 1
//delay "motorSpeed" between each pin setting (to determine speed)

void clockwise(){
// 1
digitalWrite(motorPin4, HIGH);
digitalWrite(motorPin3, LOW);
digitalWrite(motorPin2, LOW);
digitalWrite(motorPin1, LOW);
delay(motorSpeed);
// 2
digitalWrite(motorPin4, HIGH);
digitalWrite(motorPin3, HIGH);
digitalWrite(motorPin2, LOW);
digitalWrite(motorPin1, LOW);
delay (motorSpeed);
// 3
digitalWrite(motorPin4, LOW);
digitalWrite(motorPin3, HIGH);
digitalWrite(motorPin2, LOW);
digitalWrite(motorPin1, LOW);
delay(motorSpeed);
// 4
digitalWrite(motorPin4, LOW);
digitalWrite(motorPin3, HIGH);
digitalWrite(motorPin2, HIGH);
digitalWrite(motorPin1, LOW);
delay(motorSpeed);
// 5
digitalWrite(motorPin4, LOW);
digitalWrite(motorPin3, LOW);
digitalWrite(motorPin2, HIGH);
digitalWrite(motorPin1, LOW);
delay(motorSpeed);
// 6
digitalWrite(motorPin4, LOW);
digitalWrite(motorPin3, LOW);
digitalWrite(motorPin2, HIGH);
digitalWrite(motorPin1, HIGH);
delay (motorSpeed);
// 7
digitalWrite(motorPin4, LOW);
digitalWrite(motorPin3, LOW);
digitalWrite(motorPin2, LOW);
digitalWrite(motorPin1, HIGH);
delay(motorSpeed);
// 8
digitalWrite(motorPin4, HIGH);
digitalWrite(motorPin3, LOW);
digitalWrite(motorPin2, LOW);
digitalWrite(motorPin1, HIGH);
delay(motorSpeed);
}

2

  1. Use the code tag

  2. always try to share circuit diagram with controller and relevant driver .

On ULN2003An driver 1 through 4 is connected to Arduino Uno 8through 11.
Pin 5 is not connected, I am powering up the motor using a battery kronox, I looked through multimeter, it gives 6volts.

confusing from which pin connected to what??

3)Arduino | Max/Jitter + 3D + Electronics
circuit diagram attached in below link

4)check your clockwise and counter clockwise function. almost look similar.

check code here

3

Why not use the Stepper library that can do all the sequencing for you? Or AccelStepper?

4

Why not use the Stepper library that can do all the sequencing for you? Or AccelStepper?

That would have been my question too...

5

MarkT:
Why not use the Stepper library that can do all the sequencing for you? Or AccelStepper?

I don't know how to use it. I will be looking for that in a couple of days. And then decide which way is better for me. Thanks for the Hint.

PS. I am a rockie at the arduino programming, just need some directions to do the first step. I am sure after that it will get more fun :slight_smile: