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Topic: Switching a lot of lightbulbs (Read 987 times) previous topic - next topic

OptimusPrime

Hi!
I am tinkering about a project where i need to switch a lot of lightbulbs on and of.
So i searched and found some approaches. A project some of you might already know is Blinkenlights:
http://www.youtube.com/watch?v=nFacSJBCql0
Here is some interesting information provided about the setup of blinkenlights http://www.retrocmp.com/projects/blinkenbone
I was always searching for a way to do something similar myself.

Is there a known way to switch "a lot of" (lets say 128) 230V AC lightbulbs? Relayinterfaces for pc offer mostly only 8 ports. Didn't i find the right devices? Or searched the wrong term?
Another way some people try are houseautomation devices (i don't know anything about these).

Could you imagine other ways to do this?
Do you know interfaces which use lets say 12v (for small lightbulbs) and handle this without relays?

Perhaps you have an idea!
Thanks a lot!!!

CrossRoads

Does it have to be actual light bulbs? Or can it be more modern, less maintenance required high brightness LEDs?
Here are similar LEDs in a 5 foot wide Nick Fuel Band display.
http://www.crossroadsfencing.com/BobuinoRev17/Prototype_in_action.MOV
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

OptimusPrime

I know this sounds fairly stupid...but yes: due to aesthetic reasons lighbulbs are needed.
With leds there are already some convenient solutions, like addressable led stripes...
Do you know any "out of the box" solutions for high brightness leds? In my opinion the high power chips are also difficult to control, because you need a constant current source...

GoForSmoke

Switching fluorescents on and off quickly is a great way to burn up the starters quicker.

Maybe it would be better to put controllable blinds on the windows. Then even in daytime effects can be achieved.

I find it harder to express logic in English than in Code.
Sometimes an example says more than many times as many words.

Robin2

The Arduino Uno has 20 pins that can be used to control external devices. You only need 7 pins to control 128 lamps.

What you also need are a few ICs to "decode" the 7 pins into 128 separate signals and hold the setting  - something like a few 74HC259 addressable latches. After that you need something suitable to control the power to the lamps based on the setting of the latched data - perhaps just a series of relays.

...R

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