Lab1 - Blink LED

Submitted by jooddang on Wed, 01/30/2013 - 15:47

To make LED blink I constructed a circuit of (pin 13 - 220ohm resistor - LED - ground). And then, I implemented a short code to make it blink for random seconds.

 

Components Used

1- 220ohm Resister

1- breadboard

1- LED

 

Code

 

int ledPin = 13;
 
void setup() {
  pinMode(ledPin, OUTPUT);
}
 
void loop() {
  
  for (int i = 0; i < 10; i++) {
    
    int sec = random(10);   // to set blinking time randomly.
    sec = sec * 1000;
    
    digitalWrite(ledPin, HIGH);
    delay(sec);  // LED is on for random seconds.
    digitalWrite(ledPin, LOW);
    delay(1000);
  }
}
 
 
Image
 
attached.
 
LED blinking
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