NodeMCU RGB LED | For beginners

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 LEDs

An 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
Schematic of circuit


Common Anode:-Anode (+) pin is common.
Layout of circuit





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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Video



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