3) Connecting the Breadboard Power Rails

Next, we’re going to connect the microcontroller’s +5V power and GND (Ground/Negative) pins to the positive and negative power rails of the breadboard. By doing this, we’ll be easily able to connect other components to the microcontroller’s power later on.

Here is the breadboard wiring diagram for this step:

2) Adding the Resistor
4) Wiring the Buttons