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stepMotor/step_motor.ino

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+
+/*
+  Stepper Motor Demonstration 1
+  Stepper-Demo1.ino
+  Demonstrates 28BYJ-48 Unipolar Stepper with ULN2003 Driver
+  Uses Arduino Stepper Library
+ 
+  DroneBot Workshop 2018
+  https://dronebotworkshop.com
+*/
+ 
+//Include the Arduino Stepper Library
+#include <Stepper.h>
+ 
+// Define Constants
+ 
+// Number of steps per internal motor revolution 
+const float STEPS_PER_REV = 32; 
+ 
+//  Amount of Gear Reduction
+const float GEAR_RED = 64;
+ 
+// Number of steps per geared output rotation
+const float STEPS_PER_OUT_REV = STEPS_PER_REV * GEAR_RED;
+ 
+// Define Variables
+ 
+// Number of Steps Required
+
+const int stepper_motor_speed = 700;
+int pos = 1;
+const int StepsRequired  =  STEPS_PER_OUT_REV / 4;
+// Create Instance of Stepper Class
+// Specify Pins used for motor coils
+// The pins used are 8,9,10,11 
+// Connected to ULN2003 Motor Driver In1, In2, In3, In4 
+// Pins entered in sequence 1-3-2-4 for proper step sequencing
+ 
+Stepper steppermotor(STEPS_PER_REV, 6, 10, 11, 13);
+ 
+void setup()
+{
+// Nothing  (Stepper Library sets pins as outputs)
+}
+void next_step()
+{
+  if(pos == 1)
+  {
+    steppermotor.setSpeed(stepper_motor_speed);
+    steppermotor.step(StepsRequired);
+    pos = 2;
+  }
+  else if(pos ==2)
+  {
+    steppermotor.setSpeed(stepper_motor_speed);
+    steppermotor.step(-1*StepsRequired);
+    pos = 3;
+  }
+  else if(pos == 3)
+  {
+    steppermotor.setSpeed(stepper_motor_speed);
+    steppermotor.step(-1*StepsRequired);
+    pos = 4;
+  }
+  else if(pos == 4)
+  {
+    steppermotor.setSpeed(stepper_motor_speed);
+    steppermotor.step(StepsRequired);
+    pos = 1;
+  }
+}
+void loop()
+{
+  
+  next_step();
+  delay(1000);
+ 
+}