Eztronics Corp L9110S H-Bridge Stepper Motor Controller Board for Arduino

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1

I've been looking for a long time and can't find how to wire this controller between my Arduino UNO and the Stepper Motor. It has connections labeled MotorA and MotorB. My stepper motor is 4 wire Bipolar 5.4v .8A. I've ohmed out red and blue as one coil and green and black as the other coil. I'm assuming I connect one pair to MotorA and the other pair to MotorB. assuming -- oh oh
Pins to the Arduino
There are 6 pins labeled from left to right as:
B-1A B-1B GND VCC A-1A A-1B
This is where I don't have a clue. There must be some instructions somewhere out on the internet as to how to wire this thing but I haven't found them.
Can anyone help?

2

Wonderful!! I will try that. Thanks much!!

3

That worked. Seems strange there isn't instructions from the mfg.
Following is my sketch.
Is this what you were thinking?

void setup() {
// put your setup code here, to run once:
pinMode(4,OUTPUT);
pinMode(8,OUTPUT);
pinMode(9,OUTPUT);
pinMode(10,OUTPUT);
pinMode(11,OUTPUT);
int j = 1;
}

void loop()
{
int j = 0;
int ch[4] = {8,10,9,11};

for (int i = 0 ; i < 4 ; i++) digitalWrite(ch*,0);*

  • while (1)*
  • {*
  • for (int steps = 1 ; steps < 51 ; steps ++) // one revolution CW*
  • { *
  • for (int i = 0 ; i < 4 ; i++)*
  • {*
    _ digitalWrite(ch*,1);_
    _     delay(20);_
    _ digitalWrite(ch,0);
     delay(20);
     }
     }
     delay(1000);
     digitalWrite(4 , 1); // turn on the light when going in reverse*
    * for (int steps = 1 ; steps < 51 ; steps ++) // one revolution CCW*
    * {
    for (int i = 3 ; i > -1 ; i--)
     {
    digitalWrite(ch,1);
    delay(20);
    digitalWrite(ch,0);
    delay(20);
    }
    }
    delay(1000);
    digitalWrite(4 , 0); // turn off the light when going forward*
    * }
    }*_
4

I'm sorry. I've been reading for about a half hour now and cannot figure out how to find or use code tags. You say the </> icon top left. I can't see any icons top left. Do I just type </> at the beginning of the code? I could do trial and error but I don't want to load up this thread with trials. Again, sorry I'm not catching on.

5

Thanks again. I'll try posting the sketch now using what you taught me. By the way, is there a way I can edit a post after it's out there?
Since I am sending 200 pulses and that gives one revolution, this must be a combination that works right. I wonder if my pulses (HIGH then LOW) are the right duration. I suppose trial and error might be the only way to find that out.
I'm going to be teaching a high school STEM class using Arduino's the second semester so I want to be teaching the programming correctly.
Here goes the code:

//  Test Stepper Motor
//  Turns 200 steps (50 * 4)
void setup() {
  // put your setup code here, to run once:
    pinMode(4,OUTPUT);
    pinMode(8,OUTPUT);
    pinMode(9,OUTPUT);    
    pinMode(10,OUTPUT);
    pinMode(11,OUTPUT);
    int j = 1;
    }

void loop() 
    {
      int j = 0;
      int ch[4] = {8,10,9,11};    //   ch[0 to 3] is the pin numbers.  Re-arrange here to make it work.

      for (int i = 0 ; i < 4 ; i++) digitalWrite(ch[i],0);
      
      while (1)
         {
           for (int steps = 1 ; steps < 51 ; steps ++)  //  one revolution  CW
              {     
              for (int i = 0 ; i < 4 ; i++)
                      { 
                      digitalWrite(ch[i],1);
                      delay(20);
                      digitalWrite(ch[i],0);
                      delay(20);
                      }
               }
               delay(1000);
               digitalWrite(4 , 1);  //  turn on the light when going in reverse

           for (int steps = 1 ; steps < 51 ; steps ++)  //  one revolution  CCW
              {     
              for (int i = 3 ; i > -1 ; i--)
                      { 
                      digitalWrite(ch[i],1);
                      delay(20);
                      digitalWrite(ch[i],0);
                      delay(20);
                      }
              }
               delay(1000);
               digitalWrite(4 , 0);  //  turn off the light when going forward
         }
     }
6

Thank you. I appreciate your input. I agree, the array would be hard to understand for new students.
Your code is much easier to read. With cut and paste, it's not that much typing either.