S.H.A. Chile 2016 - Arduino Lecture

Blinking LED circuit

What you need:

• 1 Yellow LED
• 1 Red LED
• 2 330 Ohm resistors
• 6 cables

Connect the components according to the following diagram:

Now, we are going to program the Arduino to make those LEDs blink when we want to. Go to the Start Menu and open the Arduino program. A window that looks like this will open:

Edit the code to look like this:

Finally, press the arrow button at the top to run the program on your Arduino (you'll have to save the project somewhere on the computer first though!).

Evaluation Questions:

• Why do we connect the LED to a numbered port on the Arduino, and not to the 5v output as before?
• What's the difference between the setup() and loop() sections of the program?
• How would you make the LED blink faster? Slower?
• How would you make the LED's blink alternately (first red, then yellow, and so on)?