Creating an LED circuit with an Arduino board is a fundamental project in robotics and electronics. This guide will help you set up and control LEDs on a breadboard using an Arduino.

Step 1: Gather Components

You will need:

• An Arduino board (e.g., Arduino Uno)

• An LED (any color)

• A 220-ohm resistor

• A breadboard

• Jumper wires

Step 2: Build the Circuit

1. Power Off the Arduino: Ensure the Arduino is not connected to power.

2. Connect the LED: Insert the shorter leg (cathode) of the LED into the breadboard and connect it to the Arduino's GND pin using a jumper wire. Insert the longer leg (anode) into another row on the breadboard.

3. Add a Resistor: Place a 220-ohm resistor between the anode and a digital pin on the Arduino (e.g., pin 12).

4. Double-check Connections: Ensure all connections are secure.

Step 3: Write and Upload Code

Use the following code to turn on and off the LED: