PWN and Transistors

W3: PWN and Transistors. Fades, Voltage Dividers:

Fades:

• 1x Arduino or Genuino board
• 1x LED
• 1x Resistor 
• 6x Jumpers
• 1x Perfboard

Code: 

int led = 9;           // 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

  pinMode(led, OUTPUT);

}

void loop() {

  analogWrite(led, brightness);

  brightness = brightness + fadeAmount;

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

    fadeAmount = -fadeAmount;

  }

 

  delay(30);

}