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2 | /*
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3 | Stepper Motor Control - speed control
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4 |
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5 | This program drives a unipolar or bipolar stepper motor.
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6 | The motor is attached to digital pins 8 - 11 of the Arduino.
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7 | A potentiometer is connected to analog input 0.
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8 |
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9 | The motor will rotate in a clockwise direction. The higher the potentiometer value,
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10 | the faster the motor speed. Because setSpeed() sets the delay between steps,
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11 | you may notice the motor is less responsive to changes in the sensor value at
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12 | low speeds.
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13 |
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14 | Created 30 Nov. 2009
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15 | Modified 28 Oct 2010
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16 | by Tom Igoe
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17 |
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18 | */
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19 |
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20 | #include <Stepper.h>
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21 |
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22 | const int stepsPerRevolution = 200; // change this to fit the number of steps per revolution
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23 | // for your motor
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24 |
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25 |
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26 | // initialize the stepper library on pins 8 through 11:
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27 | Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11);
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28 |
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29 | int stepCount = 0; // number of steps the motor has taken
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30 |
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31 | void setup() {
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32 | // nothing to do inside the setup
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33 | }
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34 |
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35 | void loop() {
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36 | // read the sensor value:
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37 | int sensorReading = analogRead(A0);
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38 | // map it to a range from 0 to 100:
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39 | int motorSpeed = map(sensorReading, 0, 1023, 0, 100);
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40 | // set the motor speed:
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41 | if (motorSpeed > 0) {
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42 | myStepper.setSpeed(motorSpeed);
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43 | // step 1/100 of a revolution:
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44 | myStepper.step(stepsPerRevolution / 100);
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45 | }
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46 | }
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47 |
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48 |
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