LED blinker in Arduino UNO.....

  LED blinker By Arduino UNO

Required Materials

   1.BREAD BOARD

   2.JUMPer WIRES(male to male)

   3.UPLOADING CABLE

   4.ARDUINO UNO

   5.LEDS                                      

Step 1:

Connecting Jumper to the arduino uno digital pins from( 2 to 11),Which act as a positive pins.

                                                                                       

1.2

1.3

Step 2:

Connecting another end of the male to male jumper wire to the bread board IN ORDER.

1.4

1.5

Connect GND(ground pin(-ve)) in arduino uno to the breadboard as shown in figure.Resistor(1k ohm) is depending upon leds which your are using.Resistor is connected to the GND jumper if required.See figure (1.8) I am showing to use resistor

1.6

Step 3:

Connecting LEDs in bread board Positive lead(longer) of the LED is connected to the jumper wire section in bread board.

Negative lead(shorter)of the LED is connected as shown in figure.

1.7

1.8

Finally construction of LED blinker using Arduino UNO is completed.

WARNING:LED are very sensitive to voltage so careful.

NOTE:Resistor are only used to reduces the current flowing through the voltage.

                       

                         
Program for this project:   

void setup()

{
  pinMode(2,OUTPUT);
  pinMode(3,OUTPUT);
  pinMode(4,OUTPUT);
  pinMode(5,OUTPUT);
  pinMode(6,OUTPUT);
  pinMode(7,OUTPUT);
  pinMode(8,OUTPUT);
  pinMode(9,OUTPUT);
  pinMode(10,OUTPUT);
  pinMode(11,OUTPUT);
}

void loop() {
 
for(int i=2;i<12;i++)
{
  digitalWrite(i,HIGH);
  delay(100);
  digitalWrite(i,LOW);
  delay(100);
}
for(int i=11;i>1;i--)
{
  digitalWrite(i,HIGH);
  delay(100);
  digitalWrite(i,LOW);
  delay(100);
}
}