Instructables
In this instructable, I'm going to show you how to make a simple circuit/code with an arduino, which will make an LED connected to it flash from off to on, with 1-second intervals, as shown below. 
This is a very easy, basic idea, however it leads to many more complicated codes and circuits.
 
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Step 1: What you will need

1 x LED
3 x Cables
1 x 330 Ω Resistor
1 x Arduino board (it can be any kind, but for this instructable i used the UNO board).
1 x USB cable
1 x Computer with Arduino software installed (http://www.arduino.cc/en/Main/software if you haven't already got it)
1 x Breadboard

Optional
Breadboard/Circuit-board Holder.

Step 2: Attaching the Power Cables and resistor to the Breadboard

Firstly you will need to plug one end of a wire into the '5v' Power output on the arduino, and the other end into the positive section of the breadboard.
Then you need to plug one end of a wire into the ground ('GND') Power output, and the other end into the Negative section of the Breadboard.
Finally, you need to plug one end of the resistor from the Negative section of the Breadboard, to any horizontal line on the main section. (NOTE- It is very important to use AT LEAST a 330 ohm resistor with this circuit. If you don't, then you will almost certainly blow the LED.)

Step 4: Attaching Led

Now to attach the Led into the circuit. Be warned, it will NOT do anything until you have uploaded the code to the board, which is done at a later stage.
the way this is done is to put it so that each pin is next to a wire/resistor. This sounds unclear, but pictures should help
You have to put the LONGER pin next to the wire connected to the port, and the shorter pin next to the resistor.

Step 5: Plug into computer.

Picture of Plug into computer.
IMG_0821.JPG
Now you need to plug the arduino board into the computer. Nothing really to say here, just make sure that you don't break anything!

Here is a super easy Arduino breadboard:

http://www.dcoptimum.com/arduino-beadboard-schematic/

dropthetrends4 months ago

Great tutorial!!
I'm new to all this stuff and before I jump into programming the Arduino I'd like to start by learning a little with analog circuits.


Can I use the Arduino purely as a power supply for my breadboard?

hnvasa7 months ago

Hello, these are some of the great tutorials on starting with Arduino...
I have some other tutorials on Arduino that might be helpful:

http://www.zseries.in/embedded%20lab/arduino/

brandegor2 years ago
Perfect for me and I'm so danged glad you posted this. If you have time, keep going! This is incredibly helpful. Thanks again!
Phil B2 years ago
I know there are a lot of Instructables on Arduino, but most of them begin beyond a beginner level. Arduino is very new and unfamiliar to me. I appreciate your very basic approach for a "newbie." I look forward to anything like a step-by-step tutorial for someone not currently involved with Arduino. Right now my questions involve, "What is it?" and "Why would I want to use it?" If I were to use Arduino, I would want it to do some useful and necessary task best done by it. I would not be interested in "cool" for the sake of "cool." Thanks.
fergal (author)  Phil B2 years ago
That was my original idea, because when I started using Arduino, I couldn't find any tutorials on basic ideas, and I got very unnerved, So i made this tutorial for beginners, and am looking at making more. Thanks for the feedback!