Arduino Episode 1. Click a button to turn On/Off a LED

After almost a year without touching the Arduino Uno kit, after buying it, I can start showing step by step the book with the functions, and options.

After finishing the book, I would finally create my own project of Domotics.

Click to turn On or Off a LED light don't need no programming.

We will just create the circuit and test it:

- 1 switch

- 1 LED

- some connectors

In this project,  we plug in the Arduino into a USB port or a 9-volt battery, the Arduino will provide 5 volts between its 5V pin and its ground pin that you can use.

Step 1:

Unplug Arduino of any power source

Step 2:

Connect a red wire to the 5V pin on the Arduino, and put the other end in one of the long bus lines in your breadboard. Connect ground on the Arduino to the adjacent bus line with a black wire

Step3:

Place your switch across the center of the board

Step4:

Use a 220-ohm resistor to connect power to one side of the switch

Step5:

On the other side of the switch, connect the anode (long leg) of the LED. With a wire connect the cathode (short leg) of the LED to ground

 Now we plug the USB cable into the Arduino and press the switch