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<p class='vspace'></p><h2>Stepper Library Example Sketch</h2>
<h4>Description</h4>
<p>A stepper motor follows the turns of a potentiometer (or other sensor) on analog input 0. The <a class='wikilink' href='StepperUnipolarCircuit.html'>unipolar</a> or <a class='wikilink' href='StepperBipolarCircuit.html'>bipolar</a> stepper is controlled with pins 8, 9, 10, and 11, using one of the circuits on the linked pages.
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<p class='vspace'></p><h4>Code</h4>
<pre>
#include <Stepper.h>
// change this to the number of steps on your motor
#define STEPS 100
// create an instance of the stepper class, specifying
// the number of steps of the motor and the pins it's
// attached to
Stepper stepper(STEPS, 8, 9, 10, 11);
// the previous reading from the analog input
int previous = 0;
void setup()
{
// set the speed of the motor to 30 RPMs
stepper.setSpeed(30);
}
void loop()
{
// get the sensor value
int val = analogRead(0);
// move a number of steps equal to the change in the
// sensor reading
stepper.step(val - previous);
// remember the previous value of the sensor
previous = val;
}
</pre><p><a class='wikilink' href='index.html'>Reference Home</a>
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<p class='vspace'></p><p><em>Corrections, suggestions, and new documentation should be posted to the <a class='urllink' href='http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?board=swbugs' rel='nofollow'>Forum</a>.</em>
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<p class='vspace'></p><p>The text of the Arduino reference is licensed under a
<a class='urllink' href='http://creativecommons.org/licenses/by-sa/3.0/' rel='nofollow'>Creative Commons Attribution-ShareAlike 3.0 License</a>. Code samples in the reference are released into the public domain.
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