Practical Demostration of LED Brightness Control Using ARDUINO


Here I will Demonstrates the use of the analogWrite() function in fading an LED off and on. AnalogWrite uses pulse width modulation (PWM), turning a digital pin on and off very quickly, to create a fading effect.

Hardware Require:

  • Arduino board
  • Breadboard
  • a LED
  • a 220 ohm resistor

Circuit Diagram

Here as shown in figure Connect the anode terminal (the longer, positive leg) of your LED to digital output pin 9 on your Arduino through a 220-ohm resistor. Connect the cathode (the shorter, negative leg) directly to ground.



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