Introduction: NodeMCU RGB LED | for Beginners

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In this Tutorial i will show you what is RGB Led and how it is work An RGB LED is a combination of 3 LEDs RED, GREEN and BLUE. These three colors Red, green and blue can make any color. By varying supplied voltage to RGB LEDs different colors are formed.

An RGB LED has 4 pin interfaces. 3 Pins are for Red, Blue and Green. There is a common pins for all three LEDsAn RGB LED can be two types-Common Anode:-Anode (+) pin is common.Common Cathode:- (Cathode-/GND) pin is common.

Hardware required

  1. NodeMCU
  2. Breadboard
  3. RGB LED
  4. Resistor 1k
  5. Jumper Male to male

Step 1: Schematic of Circuit

Step 2: Layout of Circuit

Step 3: Programming:

// Mechatronicslabrpi.blogspot.com Tutorial

// Hardware: NodeMCU

int RED = 5;

int GREEN = 4;

int BLUE = 0;

void setup() {

pinMode(RED, OUTPUT);

pinMode(GREEN, OUTPUT);

pinMode(BLUE, OUTPUT);

}

void loop() {

digitalWrite(RED,HIGH);

digitalWrite(GREEN,LOW);

digitalWrite(BLUE,LOW);

delay (1000);

digitalWrite(RED,LOW);

digitalWrite(GREEN,HIGH);

digitalWrite(BLUE,LOW);

delay (1000);

digitalWrite(RED,LOW);

digitalWrite(GREEN,LOW);

digitalWrite(BLUE,HIGH);

delay (1000);

}

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Step 4: Video