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