Arduino: Building exciting LED based projects and espionage devices

LED blink

That wasn't too bad but it isn't cool enough. This little section will enlighten you, literally.

Open up a new sketch.

Go to File | Examples | 01. Basics | Blink.

Blink example

Before we upload the code, we need to make sure of one more thing. Remember the LED that we spoke about in the prerequisites? Let's learn a bit about it before plugging it in, as shown in the following image:

LED basics

We will make use of it now. Plug in the LED such that the longer leg goes into pin 13 and the shorter leg goes into the GND pin, as in the following:

LED ...