Example Code for Arduino-Motor Control

Hardware Preparation

• DFRduino UNO x1
• DFR1114 Integrated Drive N20 Motor x1

Software Preparation

• Arduino IDE： Click to Download Arduino IDE from Arduino
• Arduino Servo library：Arduino Servo library（If Arduino IDE is already built-in, there is no need for additional downloads.）

Wiring Diagram

Sample Code

#include <Servo.h>

#define speed_maxP 0   //Clockwise rotation (Max speed)
#define speed_maxN 180 //Anticlockwise rotation (Max speed)
#define speed_stop  90 //Stop

Servo  mymotor;  // create servo object to control a servo (my motor)
                 // twelve servo objects can be created on most boards

int pos=0;
void setup()
{
  mymotor.attach(9);  //attaches the motor on pin 9 to the servo object
}
void loop()
{
  /**********Using 180 degree servo library to control N20 motor******************************/
  mymotor.write(speed_stop);     //Stop
  delay(1000);                   //delay 1s
  mymotor.write(speed_maxP);     //Clockwise rotation
  delay(2000);                   //delay 2s
  mymotor.write(speed_maxN);     //Anticlockwise rotation
  delay(2000);                   //delay 2s
  for(pos=speed_maxP;pos<speed_maxN;pos++)  //slow down, change the direction and speed up
  {
    mymotor.write(pos);
    delay(50);
  }
}

Additional Information

• "0-180" degree corresponds to the pulse width signal "500us-2500us"；
• When we give a value between 81-99° (1400-1600us), the motor will stop;
• When we give a value less than 81° (1400us), the motor rotates clockwise, the smaller the value, the faster the speed, 0° (500us) is the maximum speed;
• When we give a value greater than 99° (1600us), the motor rotates anticlockwise, the larger the value, the faster the speed, 180 ° (2500us) is the maximum speed;
• Since every motor has a little difference, we enlarge the stop range to ensure that the motor can be stopped correctly；