Place the LED in the breadboard as shown in Fig. 2, keeping in mind that the anode is the longer of the two “legs” and the cathode is the shorter. (The cathode in Fig. 2 is to the left and the anode is to the right.) In a subsequent project we'll add more LEDs to the circuit, so, despite the fact that we only have a single LED here, we'll identify this as LED A. (Note that, other than the chipKIT pin used to drive the LED, this portion of the overall circuit is functionally identical to the circuit described in the Blinking an External LED project.)