Arduino traffic lights

I made this project on the same night that my Arduino Duemilanove arrived from Cool Components.  After being an Instructables member for about a year I though it was time I should contribute. There is another Arduino traffic light project similar to this, but it is much more complex; mine is aimed at beginners and children (who already know the basics).
Arduino for traffic lights
As a beginner to the Arduino I had spent a fair amount of time researching them and how they work prior to investment, I had already learnt a little about so I was familiar with the programming environment.

This project takes very little skill to make, and I think it is ideal as a ‘first’ project (it gives a ‘real world’ application to the traditional ‘LED Blink’ tutorial.

This instructable aims to give beginner Arduino users a project to do, rather than teach them about electronics, so I have left out things such as the polarity of LEDs, because information like this can be found in a myriad of locations.  Because of this I have made the presumption that you own (or are getting) an Arduino, can connect it to your computer, know how to strip wires and the such.

“Hear me ye foreigners, there be Angles on this here site!” – The code and hardware is designed for the English lighting system, feel free to adapt it to your preferred pattern/colours etc.

Step 1: Bits and bobs.

For this project you will need:

1 x Arduino (Duemilanove 328)
1x Breadboard, fairly large one (I don’t know the size)
3 x LEDs (Red, amber and green)
*some wire*
USB cable for programming
Computer / laptop preferably with a desk
1 x paper clip

The paper clips shown in the picture have already been shaped. (sorry)

Step 2: Mount the Arduino

I needed to come up with a way of fastening my Arduino to my breadboard, so I put a cut, bent paper clip through the PCB and into two of the boards holes.

The close-up photo was taken using a home made macro lense – search instructables to find out how! 😀

Step 3: Wires, wires, wires.

According to the programme the wiring should go like this:
Arduino for traffic lights circuit
Pin 12 – Red LED
Pin 3 – Amber LED
Pin 2 – Green LED
Ground – bottom row of breadboard

have a look through all the pictures to get a better idea of what is going on.

Don’t ask why I did not use pins nearer to each other 😀

[box color=”#985D00″ bg=”#FFF8CB” font=”verdana” fontsize=”14 ” radius=”20 ” border=”#985D12″ float=”right” head=”Major Components in Project” headbg=”#FFEB70″ headcolor=”#985D00″]1 x Arduino
1x Breadboard, fairly large one
3 x LEDs[/box]


For more detail: Arduino traffic lights

About The Author

Ibrar Ayyub

I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough research and presenting information in a structured and logical format.

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