Instructables

Skyline RGB LED Lamp

video Skyline RGB LED Lamp
This is the first version of my Skyline Lamp. The circuit and the code that runs the microprocessor were all developed using the Arduino environment and then once I was happy everything worked as I wanted it I made my own circuit board using an Atmel ATMega168 microprocessor running my code to control the dual RGB LED's. The test version used 4 LED's but I managed to find a supplier of nice bright RGB LED's so this final version uses just two.

The code is set to randomly choose two RGB Colours (256 values per colour channel) and then slowly morph from the last set of colours to the new set with a 10 seconds delay inbetween the transitions.

Version 2 of this will include a TLC5940 chip to enable a much smoother transition. The PWM on the AVR gives you 256 greyscale steps whereas the TLC5940 gives you 4096 giving a far smoother control. You also get the ability to control 5 seperate RGB LED's from one chip compared to 2 directly from the Arduino using PWM (although there are ways to simulate PWM on other Digital I/O lines in software).

I love the way the lights give a misty effect to the rear buildings making them look like they are floating in a sea of coloured mist. The video doesn't do it justice. The lamp looks far nicer in real life.

The skyline is based on Liverpool. These lamps are available for sale, with a skyline of your own choosing, upon request.

earthshinedesign.co.uk
WhiteTech2 years ago
Like thesixsmashblitz said below, It would be neat to have it as a clock, but have different LEDs for different parts, like sky, moon sun ect

Something like this absolutely gorgeous piece of art:

http://www.arttec.net/art/Sunrise-Sunset/index.html
Very cool!

i think it would be interesting to try to incorporate this into a clock, coinciding the background with night, sunrise, daytime, sunset etc.

TheArduinoGuy (author)  thesixsmashblitz4 years ago
Good idea
Berserk875 years ago
nice effect. no instructable?
there is a similar one http://www.instructables.com/id/LED-Silhouette-Art-color-changing/ you may be able use the same basic design:-)
TheArduinoGuy (author)  Berserk875 years ago
Glad you like it. I do intend on doing a full instructable on this at some time in the future (maybe next month if I get the time).
cool. ive already done the rgb stuff using a microcontroller. just curious about making the city. you draw/cut it yourself? or is there a stencil?
TheArduinoGuy (author)  Berserk875 years ago
Yeah this was a test so it was simply made out of white card. I did some design in Photoshop using photographs of the real skyline as a reference and then printed out the outlines to scale and cut them out. The plan is to make the finished product out of perspex (acrylic). Now I just need to laser cutter !!!
Ponoko.com is where I laser cut stuff.
waver4 years ago
nice one really, I was looking to do same thing
how can I get the schemati?
Thats a great idea! Now if you could get one of those skyline photos and do this in the back, that'd be the deal. Not that theres anything wrong with what you did, I have been tossin this idea around for a while before I found this site. A buddy of mine got a night shot of Bank of America Stadium during the playoffs last season. He then blew it up wall sized for his office. I have been thinkin about how to make his better and you have done it! Light the huge graphic up! Thanks fro the inspiration, Instructable when I make it happen...
macobt5 years ago
where is this schematic for this RGB
jeff-o5 years ago
Very cool. I'd also love to see a full instructable. In the meantime, do you have source code available?
TheArduinoGuy (author)  jeff-o5 years ago
Sure, my code can be found on the Arduino Forum....

http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1226962662/0#0
Thanks!