Arduino UNO R3/MEGA 2560 R3 Project 9: RGB LED

Posted by Fiona Su on March 22, 2020

Introduction

Tricolor principle to display various colors;
PWM controlling ports to display full color;
Can be driven directly by Arduino PWM interfaces.

RGB LED

Hardware List

Arduino controller × 1
USB cable × 1
Full-color LED module × 1
Resistor *3
Breadboard jumper wire*5

Video Tutorial

Connection

Connection for REV4:

Connection for 2560 R3:

Sample Code:

int redpin = 11; //select the pin for the red LED
int bluepin =10; // select the pin for the blue LED
int greenpin =9;// select the pin for the green LED

int val;

void setup() {
  pinMode(redpin, OUTPUT);
  pinMode(bluepin, OUTPUT);
  pinMode(greenpin, OUTPUT);
  Serial.begin(9600);
}

void loop() 
{
for(val=255; val>0; val--)
  {
   analogWrite(11, val);
   analogWrite(10, 255-val);
   analogWrite(9, 128-val);
   delay(1); 
  }
for(val=0; val<255; val++)
  {
   analogWrite(11, val);
   analogWrite(10, 255-val);
   analogWrite(9, 128-val);
   delay(1); 
  }
 Serial.println(val, DEC);
}

Result

Directly copy the above code into arduino IDE, and click upload thumb , wait for a few seconds, you can see a full-color LED.

thumb

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Tags: arduino starter kit tutorial, arduino tutorial, arduino uno starter kit tutorial