Instructables

How to run (and power) 40 16' LED strips with a single controller?

I am working in a room with an exposed beam ceiling.  I am planning on running 16' strips of 12v RGB 5050 (150 LED) up each rafter.  So in total I will end up with around 40 strips.  Each strip is listed to consume ~36w.  Tons of info on the net about controlling and powering 2-4 strips at a time. But 40?  I'm having trouble drawing out how to power the strips (power supplies + amplifiers) at the same time being able to control them from a single controller.  (A simple generic controller that has selectable colors/ blinking/ etc)  Is is possible to control all these with a single RGB controller?
I would love to get into a DMX setup. But all the DMX controllers I've seen only show controlling a grid of 300 LED's.  Is there anything remotely feasible for a home setup that could control 6000 LEDs?

pandyaketan2 years ago
Only using a diode and a resistor! See my projects! ;-)
mrlegoman (author)  pandyaketan2 years ago
I've looked at your project and I'm not sure what I'm looking for. The light strips I'm planning on using have 150 5050 LED's in each strip. I'm hooking up 40 strips and would like to be controlled from a single source. So I'm stuck on trying to figure out how to properly power them while maintaining control at a single source.
To light them all up, you need to connect them in parallel, in such a way that the appropriate voltage is supplied to them.

as a thumb rule, u require one capacitor (of rating 0.22 uF for 220 VAC mains or 0.47 for 110 VAC) for every 30 leds.

Such 30 leds should then be connected in parallel, to either a doide bridge, if circuit is plus/minus type (see my led bulb part 2) or if u have made led pairs, like my part 1, then such 15 pairs would make one set. Such sets should be then parallel, ensuring that there is a capacitor for every 30 leds. and all those capacitors are finally in parallel.

The final point of the capacitors is where ur controller goes. But also ensure that at this starting point, voltage is at circuit level and not at mains level - what ever u r using - adaptor, diode bridge, etc....

hope it helps...

reg
ketan
Are these smart strips ?
In which case its pretty easy.
mrlegoman (author)  steveastrouk2 years ago
Not yet. Because of my original budget I wanted to keep cost down and currently plan to use just the standard RGB strips. But I'm stuck on how to distribute power and control at the same time. I've seen projects involving the smart strips with up to 300 lights. But I'm lost on how to scale that to a 6000 light setup.
Whether these are dumb or not, basically, you need multiple power feeds, from a good sized conductor, to stop voltage drops which will induce flicker in your lights.

The PSUs needs calculating, but its probably available off the shelf. It won't be a cheapie off Ebay though. Work out the total current for all the LEDs of one colour, so you can figure the current you need.