First Arduino Lab. How to blink an LED

1. Arduino Lab 1.0
Lab 1.0 - LED Blinking

2. Material Required
Arduino Board + RS232 Cable + Power
Supply
Or
Arduino Mega + USB Cable
Installed Arduino IDE on your computer
Working RS232 or USB port in your
computer

3. Setup
Arduino programming is like C.
It has t wo basic functions.
First is setup - this has all commands
that are executed only once.
void setup (void)
{
;
}

4. Loop
Second function is loop - This has
commands executed in a continius loop.
void loop (void)
{
;
}

5. Predefined Commands
There are few predefined commands
First command is pinMode. This sets the
function of pin as input or output.
Usually this is done in setup function
void setup (void)
{
pinMode (13,OUTPUT);
}

6. Predefined Commands
Another is digitalWrite.
This write HIGH or LOW on pins defined as
OUTPUT.
This can be executed in setup or loop
function
void loop (void)
{
digitalWrite (13,HIGH);
}

7. Predefined Command
Another command is delay.
This provide delay in msecs.
void loop (void)
{
digitalWrite (13,HIGH);
delay(500);
digitalWrite (13,LOW);
delay(500);
}

8. First Program
#define LED 13
void setup (void)
{
pinMode (LED,OUTPUT);
}
void loop (void)
{
digitalWrite (LED,HIGH);
delay(200);
digitalWrite (LED,LOW);
delay(200);
}

9. Verify-Upload
Click on VERIFY (Sketch | Verify)
Click on UPLOAD (File | Upload)
Wait - it will start running, LED will
start blinking after few seconds.
Change the delay, verify and upload
again. See the difference on blinking
time and speed.

10. Next Level Program
Modify the program so that with single
LED you create morse code of SOS.
Send me an email giving your
experience, total time spent and
problems faced in the process.
This is first part of training. You will be
getting next level of training soon.

11. Contact Me
Have more ideas, queries, suggestions?
Contact me at -
Vinay Chaddha
email : vinay@open-embedded.info
SMS : 9811074026
know more about me at visualcv.com/
gvc3065

12. Check us online
Join our facebook page at
facebook.com/open.embedded
Buy products from myworld.ebay.in/
open.embedded