Wiring connections

Connecting the LED to the Raspberry Pi is straightforward. Before doing this, however, let's take a closer look at the pins of the LED:

The LED contains one positive pin and one negative pin. The long pin is the positive pin, which you can connect to any data pin of the Raspberry Pi. The short pin is the negative pin, which can be connected to the ground pin of the Raspberry Pi.

Let's connect it up. First, connect the negative pin of the LED to the ground pin (physical pin number 6) of the Raspberry Pi. Next, connect the positive pin of the LED to wiringPi pin number 15:

 

Now the we've connected the LED to the Raspberry Pi, let's write a program to make the LED blink.