| /* | |
| Stepper Motor Control - speed control | |
| This program drives a unipolar or bipolar stepper motor. | |
| The motor is attached to digital pins 8 - 11 of the Arduino. | |
| A potentiometer is connected to analog input 0. | |
| The motor will rotate in a clockwise direction. The higher the potentiometer value, | |
| the faster the motor speed. Because setSpeed() sets the delay between steps, | |
| you may notice the motor is less responsive to changes in the sensor value at | |
| low speeds. | |
| Created 30 Nov. 2009 | |
| Modified 28 Oct 2010 | |
| by Tom Igoe | |
| */ | |
| const int stepsPerRevolution = 200; // change this to fit the number of steps per revolution | |
| // for your motor | |
| // initialize the stepper library on pins 8 through 11: | |
| Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11); | |
| int stepCount = 0; // number of steps the motor has taken | |
| void setup() { | |
| // nothing to do inside the setup | |
| } | |
| void loop() { | |
| // read the sensor value: | |
| int sensorReading = analogRead(A0); | |
| // map it to a range from 0 to 100: | |
| int motorSpeed = map(sensorReading, 0, 1023, 0, 100); | |
| // set the motor speed: | |
| if (motorSpeed > 0) { | |
| myStepper.setSpeed(motorSpeed); | |
| // step 1/100 of a revolution: | |
| myStepper.step(stepsPerRevolution / 100); | |
| } | |
| } | |