直流馬達控制、脈衝寬度調變

https://www.youtube.com/watch?v=gp7iiTzA9_Y
https://learn.adafruit.com/adafruit-arduino-lesson-13-dc-motors/breadboard-layout

/*

Adafruit Arduino - Lesson 13. DC Motor

*/

int motorPin = 3;

void setup() 

{ 

  pinMode(motorPin, OUTPUT);

  Serial.begin(9600);

  while (! Serial);

  Serial.println("Speed 0 to 255");

} 

void loop() 

{ 

  if (Serial.available())

  {

    int speed = Serial.parseInt();

    if (speed >= 0 && speed <= 255)

    {

      analogWrite(motorPin, speed);

    }

  }

}