Easy LED Sequential Control using Arduino UNO

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What is Arduino UNO ?

Arduino UNO is a microcontroller board which can be connected on a computer using a USB cable, or it can be supply by Ac-to-Dc Adapter. Uno has 14 output and input pins, on that 14, 6 of them can be used as a PWM outputs.

To download the latest Arduino IDE : Pls click here

What will i learn in following this tutorial ?

• How to use Arduino Uno and Arduino IDE
• Control the LED sequentially

Components Needed

• Arduino Uno
• (4) Jumping Wires
• (3) LED Blue , Green , Red
• Breadboard
• (3) 220 ohms resistor
• USB cable

Difficulty

• Easy

Tutorial :
Step 1 : Physical Connection of LED to Arduino UNO.

Connect the following :

• VCC to 5V of Arduino Uno
• Led to Resistor
• Resistor to Ground
• Blue LED on pin 13 of Arduino
• Green LED on pin 12 of Arduino
• Red LED on pin 11 of Arduino
  

Step 2 : Connection of Arduino IDE to Arduino UNO

• Connect the Arduino UNO using the USB cable to a computer.
  

• Open your Arduino IDE, go to Tools > Board > and choose Arduino/Genuino Uno.
  

Step 3 : The Code

• Just follow the codes below.
  

int LED1 = 13;
int LED2 = 12;
int LED3 = 11;

void setup()
 {
   pinMode(LED1, OUTPUT);
   pinMode(LED2, OUTPUT);
   pinMode(LED3, OUTPUT);
}


void loop()
 {
  digitalWrite(LED1, HIGH);    
  delay(200);                  
  digitalWrite(LED2, HIGH);    
  delay(200);                  
  digitalWrite(LED3, HIGH);   
  delay(200);                 
  digitalWrite(LED1, LOW);  
  delay(300);                  
  digitalWrite(LED2, LOW);    
  delay(300);                 
  digitalWrite(LED3, LOW);     
  delay(300);                
}

Step 4 : Compile and Run

• After compiling, don't forget to upload the sketch before running.
  
  

Remember that the LED has two tails, the short tail will be the negative and the long tail will be the positive. If you have change the code, compile and upload it again so that the latest code will run.

Failure is not a hindrance to success, yet Failure is a success because you learn something from it.