Stepper Motor direction control using S9110 Bridge

Summarizing  Arduino Tutorial 35: Understanding How to Use a Stepper Motor

Using Stepper Motor from EPO Summer Camp

Motor driver L9110S H Bridge, a Stepper Motor,  jumper cables are available at EPO Houston or online.

Stepper Motor Wiring:  

From Motor Driver to Arduino

• A1B (white) to pin 8
• A1A (gray)   to pin 9
• VCC  to 5V
• GND to GND
• B1B (orange) to pin 10
• B1A (blue)    to  pin 11

From Stepper Motor to Motor Driver:  Just had to match cables from stepper motor. However for some stepper motors the polarity pairs may be different.

Code

From video, but changed for stepper motor being used. (ie steps/rev are different)

Homework button code is not shown on purpose. 

Hint: Add button and signal in and out wires to the Arduino.

#include <Stepper.h> 

// The stepper motor used is 7.5 deg/steps => (1 rev/360 deg) *(360 deg/7.5 steps) = 48 steps/ rotation.

const int stepsPerRevolution = 48;  // chg this to fit the #steps/rev for specific motor

Stepper motor(stepsPerRevolution, 8,9,10,11);  // pins 8-11

int motorSpeed = 10;  //24  in rpm = revolutions/minute

int delayTime = 3000;

void setup() {

  Serial.begin(9600);

  motor.setSpeed(motorSpeed);

}

void loop() {

  motor.step(stepsPerRevolution); // fwd 1 revolution

  delay(delayTime);

   motor.step(-stepsPerRevolution); // reverse direction 1 rev

  delay(delayTime); 

}