Arduino Light bulb fading using MOSFET and Optocoupler

This is simple demonstration of arduino's builtin fade LED example code but using 12v bulb and mosfet instead of LED and driving the bulb through n-channel mosfet and mosfet is driven by optocoupler iaolation. purpose of this example is to safely operate any hight voltage load using arduino through galvanic isolation of optocoupler thus avoiding any damage to arduino

this example used PWM example to fade the light bulb by changing the duty cycle of signal at pin 3. speed of DC motor can also be controlled using this example

Ready to embark on this electrifying adventure? Copy the code bellow, upload it to your Arduino, and witness the magic unfold. Don't miss out on more captivating projects – visit our Youtube channell HobbyElectroLab and discover a treasure trove of DIY electronics. 

int led = 3;           // the PWM pin the LED is attached to

int brightness = 0;    // how bright the LED is

int fadeAmount = 5;    // how many points to fade the LED by

// the setup routine runs once when you press reset:

void setup() {

  // declare pin 9 to be an output:

  pinMode(led, OUTPUT);

}

// the loop routine runs over and over again forever:

void loop() {

  // set the brightness of pin 9:

  analogWrite(led, brightness);

  // change the brightness for next time through the loop:

  brightness = brightness + fadeAmount;

  // reverse the direction of the fading at the ends of the fade:

  if (brightness <= 0 || brightness >= 255) {

    fadeAmount = -fadeAmount;

  }

  // wait for 30 milliseconds to see the dimming effect

  delay(20);

}

In this project will get the answers fo the following question.

Arduino programming for beginners.

arduino fade led tutorial.

How to Fade a Bulb with Arduino analogWrite function. 

LED Fading Arduino code .

Arduino Tutorial.

Understanding the Arduino Analog Write Command.

How to Use analogWrite Command in Arduino