[SML] 4 channel LED dimming. NOT RGBW

[JIM VOGEL]

Stuart,
After a long but fun and interesting Google search, I see what you mean, not many/any RGBI LED drivers.

I did maybe find one, the ADJ LED Pixel 4C, (or LED Pixel 10C), manual at
http://intranet.americandj.com/ItemRelatedFiles/6994/led-pixel-4c.pdf.
The controllers have a 5 channel mode, where DMX channels 1-3 are RGB, and DMX channel 4 is Intensity. DMX channel 5 effects strobe/sound activation. It's output controls 4 (or 10 for the 10c) led pixel tubes via 4 wires, at 24v; my guess is that there is a wire for R, G, B, and ground. So if your existing DMX channels are not sequential, and you didn't drive the 5th DMX channel, and you could run on 24v, it might work...
And at $120, it might be worthwhile buying one to see, or tearing it apart to make it work.
There was also a Arduino DMX project that alluded to RGBI DMX controller. http://kll.engineering-news.org/kllfusion01/articles.php?article_id=7. You might be able to build your own using the info there.

Interesting challenge. :-)
Best of luck!
Jim


Sent from my iPad

On Jul 18, 2016, at 7:53 PM, sdwheaton via Stagecraft <stagecraft at theatrical.net<mailto:stagecraft at theatrical.net>> wrote:

I appear to have unintentionally led everyone astray.  Let me try again.

We have a few shows using LEDion  panels (flat LED panels common in discos etc) the panels have simple RGB LED strips inside, but they run from a driver module that is no longer supported by the manufacturer.  That module uses 4 channels per panel.  RGBI.  Modules could run 4,8, or 16 panels each from a DMX feed.

We used to be able to obtain the decoder chip in the driver box. But we can no longer get it.
Now when a driver fails, it is a brick...  the show, however, must go on.  We could Re wire the system to use a cluster of small LED dimmer blocks, but the existing cues are built around the RGBI drivers and most LED dimmers are not built that way,  if we cannot find a dimmer/driver that uses RGBI output, we will need to get the lighting for the show re-cued, adding considerable expense to a retrofit that will already cost serious dollars.

So what I am essentially looking for would be a small LED dimmer that has RGBI capability.

I apologize for the confusion.

Stuart


Sent from my T-Mobile 4G LTE Device
-------- Original message --------
From: "C. Andrew Dunning via Stagecraft" <stagecraft at theatrical.net<mailto:stagecraft at theatrical.net>>
Date: 7/18/2016 3:47 PM (GMT-05:00)
To: 'Stagecraft Mailing List' <stagecraft at theatrical.net<mailto:stagecraft at theatrical.net>>
Cc: "C. Andrew Dunning" <landrudesign at gmail.com<mailto:landrudesign at gmail.com>>
Subject: Re: [SML] 4 channel LED dimming. NOT RGBW

Perhaps missing the point from the O.P., but many LED products don't use an Intensity channel.  They rely on the console to provide that functionality virtually.

C. Andrew Dunning
Landru Design
-
Nashville, TN, USA
-
cad at landrudesign.com<mailto:cad at landrudesign.com>
landrudesign at gmail.com<mailto:landrudesign at gmail.com>
landrudesign at comcast.net<mailto:landrudesign at comcast.net>
www.landrudesign.com<http://www.landrudesign.com>



From: Stagecraft [mailto:stagecraft-bounces at theatrical.net] On Behalf Of Dave Vick via Stagecraft
Sent: Monday, July 18, 2016 2:41 PM
To: sdwheaton at fuse.net<mailto:sdwheaton at fuse.net>; Stagecraft Mailing List
Cc: Dave Vick
Subject: Re: [SML] 4 channel LED dimming. NOT RGBW

On Monday, July 18, 2016, Stuart Wheaton via Stagecraft <stagecraft at theatrical.net<mailto:stagecraft at theatrical.net>> wrote:
On 7/18/2016 1:55 PM, JIM VOGEL wrote:
Most LED's have a profile for RGBI (and IRGB).

I'm not sure I follow you...

Just a wild-ass guess, but I'm betting  the "I" in the RGBI/IRGB profile is for "Intensity"....




--
Dave Vick
Just Another Guy Tryin' To Survive
Sent from the DavePad
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