blinking lights with an Arduino

Installing Arduino software:

1. Download the software from Arduino website
2. The file will be in zip format
3. Copy the Arduino application to the application folder on your computer

Blinking a single LED:

1. To set up the program for your board go to tools-board-Arduino Uno and then tools-serial port-USB
2. Make sure you have completed you circuit (however, the positive wire should be put in Pin 13)
3. line one under "initialize digital pin 13 as an output" is pinMode (13, Output)
4. line under "the loop function runs over and over again forever
   1. void loop () {
   2. digitalWrite (13, HIGH) // turn the LED on (HIGH is the voltage level)
   3. delay (# of milliseconds) //wait for a second
   4. digitalWrite (13, LOW) //turn the LED off by making the voltage LOW
   5. delay (#of milliseconds) //wait for a second

** you can also get the copy of this code from the Arduino website

https://www.arduino.cc/en/tutorial/blink

Blinking two LED:

1. If you download the code of blinking one LED, you can add to it to make two LEDs blink
2. Make sure you have completed the circuit with 2 LED (One connected to Pin 13 and one connected to pin 6)
3. Under pinMode(13, OUTPUT), write pinMode (6, OUTPUT);
4. Under digitalWrite (13, HIGH), write digitalWrite (6, LOW);
5. Under digitalWrite (13, LOW), write digitalWrite (6, HIGH);
6. In the above steps the HIGHs and LOWs are opposite to make the LEDs blink opposite
7. Make sure there is no extra characters/typos because it will send an error message

Troubleshooting:

• as mentioned before, make sure there are no typos or extra character because they will send an error message
• There should be a ";" after each line
• Do not write Delay again for the second LED
• Be sure to have the two LEDs opposite of HIGH and LOW
• There should never be two Arduinos plugged into one computer; it will not work