Blink a LED

Hello all…

Any idea about Raspberry Pi?

If you have followed my previous page, you might have known something about Raspberry Pi. I would like to share on how it works with GPIO functions in this blog. Unlike Arduino Uno, Raspberry Pi 2 is more sensitive to any short circuit or current leakage. I suggest every user to check the pins properly before putting any wires on it.

The GPIO built on Raspberry Pi 2 retrieved from some online resources:

Adafruit

RPi Blog

I have printed it nicely and stick to my file which I’m using every day. I like to see this as my wallpaper as well LOL.

Let’s get started with the hardware configuration.

I am using few components which included:

1. A LED

2. 220 ohm resistor

3. Breadboard

4. Raspberry Pi with some jumper wires

By using Fritzing, I have assembled everything on a virtual board with Raspberry Pi.

Here’s the schematic:

Next, we are gonna build up the python script.

Go to the Start menu, search for LX terminal.

Type: sudo idle

Once the Python Window pops up, open a new file (CTRL + N)

Type in the following code:

************************************************************

import RPi.GPIO as GPIO

import time

GPIO.setmode(GPIO.BOARD)

GPIO.setup(26,GPIO.OUT)

while True:

                GPIO.output(26, True)

                time.sleep(1.0)

                GPIO.output(26, False)

                time.sleep(1.0)

************************************************************

Then, save it as py. File and run it (press F5).

If it fails to work, add in the following line:

GPIO.setwarning(False)

Or change

GPIO.setmode(GPIO.BOARD)

into

GPIO.setmode(GPIO.BCM)

Then, try to run it.

See you again.