Interfacing of Raspberry pi with Led

Interfacing of Raspberry pi with Led:

1)   Led Blinking for Finite Time:

Now ready to write code to switch the LED on and LED off.  Turn on your Raspberry Pi and Open the terminal window.

Create a new text file “led1.py” by typing the following:

Sudo nano led1.py

After that write following code to the Text editer page:

import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM) #board usage gpio pin , bcm usasge pin mnumber
GPIO.setwarnings(False)
GPIO.setup(18,GPIO.OUT)
print "LED on"
GPIO.output(18,GPIO.HIGH)
time.sleep(1)
print "LED off"
GPIO.output(18,GPIO.LOW)

After writing the code we checked it, save and exit the text editor with

 “Ctrl + x” then “y” then “enter”.

To Running this Code Type:

sudo python led1.py

then

You will see the LED turn on for a second and then turn off for a second.

2)   Led Blinking for Infinite Time:

Now ready to write code to switch the LED on and LED off for infinite time.  Turn on your Raspberry Pi and Open the terminal window.

Create a new text file “led2.py” by typing the following:

Sudo nano led2.py

After that write following code to the Text editer page:

import RPi.GPIO as GPIO

from time import sleep

GPIO.setmode(GPIO.BOARD)#board usage gpio pin , bcm usasge pin mnumber

GPIO.setwarnings(False)

for i in range(2,5):

    GPIO.setup(i,GPIO.OUT)

while(1):

    for i in range(2,5):

        GPIO.output(i,True)

        print("true")

        sleep(1)

        GPIO.output(i,False)

        print("false")

        sleep(1)

After writing the code we checked it, save and exit the text editor with

 “Ctrl + x” then “y” then “enter”.

To Running this Code Type:

sudo python led2.py

then

You will see the Leds turn on and  turn off for infinite time .

Circuit Diagram: