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Controlling Motors

Page history last edited by Jonathan Dietz 7 years, 7 months ago

 

This uses an L293D chip as a motor controller 

 

http://luckylarry.co.uk/arduino-projects/control-a-dc-motor-with-arduino-and-l293d-chip/

 

http://itp.nyu.edu/physcomp/Labs/DCMotorControl

 

 

int switchPin = 2;    // switch input
int motor1Pin1 = 3;    // pin 2 on L293D
int motor1Pin2 = 4;    // pin 7 on L293D
int enablePin = 9;    // pin 1 on L293D

void setup() {
  // set the switch as an input:
  pinMode(switchPin, INPUT);

  // set all the other pins you're using as outputs:
  pinMode(motor1Pin1, OUTPUT);
  pinMode(motor1Pin2, OUTPUT);
  pinMode(enablePin, OUTPUT);

  // set enablePin high so that motor can turn on:
  digitalWrite(enablePin, HIGH);
}

void loop() {
  // if the switch is high, motor will turn on one direction:
  if (digitalRead(switchPin) == HIGH) {
    digitalWrite(motor1Pin1, LOW);   // set pin 2 on L293D low
    digitalWrite(motor1Pin2, HIGH);  // set pin 7 on L293D high
  }
  // if the switch is low, motor will turn in the opposite direction:
  else {
    digitalWrite(motor1Pin1, HIGH);  // set pin 2 on L293D high
    digitalWrite(motor1Pin2, LOW);   // set pin 7 on L293D low
  }
}

 

 

See also http://www.ecs.umass.edu/ece/m5/tutorials/H-Bridge_tutorial.html

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