Example Code for Arduino-PWM Speed Control

Hardware Preparation

• DFR0332 Gravity: DC Fan Module (SKU:DFR0332 x 1)
• DFRduino UNO R3 with IO Expansion Shield and USB Cable A-B (SKU:DFR0216-2 x 1)

Software Preparation

• Development Tool: Arduino IDE (version unspecified). Download link: Arduino IDE

Wiring Diagram

Sample Code

//Arduino Sample Code for Fan Module
//www.DFRobot.com
//Version 1.0

#define Fan 3    //define driver pins

void setup()
{
  pinMode(Fan,OUTPUT);
  Serial.begin(9600);    //Baudrate: 9600
}
void loop()
{
  int value;
  for(value = 0 ; value <= 255; value+=5)
  {
    analogWrite(Fan, value);   //PWM
    Serial.println(value);
    delay(30);
  }
}

Result

The fan speed gradually becomes faster