Example Code for Arduino-LED Dimming

Hardware Preparation

Software Preparation

• Development tool: Arduino IDE (download link: https://www.arduino.cc/en/software)
• Required library: None (uses built-in functions)

Wiring Diagram

• LED1 → D9 (Arduino)
• LED2 → D10 (Arduino)
• LED3 → D13 (Arduino)

Other Preparation Work

Ensure the Nova board is connected to your computer via Micro USB.

Sample Code

// # Editor    :Holiday from DFRobot
// # Data      :08.06.2013

// # Product name:Nova
// # Product SKU:Unknown
// # Version : V2.0

// # Description:
// # This sample shows how to use the Nova for LED controlling

// # Connection:
// # LED1，LED2，LED3 ->D9,D10,D13 (Arduino)

void setup()
{
  pinMode(9,OUTPUT);
  pinMode(10,OUTPUT);
  pinMode(13,OUTPUT);
}
void loop()
{
  for (int i=0;i<255;i++)
  {
    analogWrite(9,i);                    //LEDs will be brighter with a rising "i"
    analogWrite(10,i);                   //"i" means the value of PWM
    analogWrite(13,i);
    delay(10);
  }
  delay(100);
  for(int i=255;i>0;i--)
  {
    analogWrite(9,i);                   //LEDs will be darker with a declining "i"
    analogWrite(10,i);                  //"i" means the value of PWM
    analogWrite(13,i);
    delay(10);
  }
}

Result

LEDs will change their light between dark to bright circularly.