>
> On Jun 1, 2010, at 10:19 PM, Jesse Lackey wrote:
>
> Sorry, to clarify... the 24V dc/dc is a cheap little thing to make  
> 4V at
> approx 3amps, and the design is such that it gets populated on 1/3 of
> the 15" strip-boards.  So every 3 boards there is the "local 4V" dc/dc
> that drives that strip and the next 2 plugged in.  Then another
> strip-board with the dc/dc populated is used, etc.  The maximum  
> distance
> of this is determined by 24V bus current on the pcb traces and thru  
> the
> ribbon connector, and bandwidth of the update of the LEDs, and these
> drivers (look into Macroblock, have not used them yet, looks  
> promising)
> can do 12 or 16-bit PWM per channel (i.e. 12 bits per LED per color
> updated 30fps).  I'd like to get 30+ feet per controller, but the
> board-to-board connector may limit the 24V current to substantially  
> less
> than that.  But this is a design that only exists in my head and Excel
> so far, with further tradeoffs TBD.
>
> J
>
>

Jesse Lackey wrote:
> Hi, I did a 10,000 RGB design at a 4" grid last month, which is fairly
> similar to what you're thinking of doing:
> http://www.celestialaudio.com/Leamington/index.html
>
> and am starting a new design with 1" spacing.  I'm going to use 24V  
> with
> a dc/dc to get to approx 4V, and Macroblock LED driver chips, the idea
> being that dozens of 15" "strips" can be plugged end-to-end (either
> directly together or tiny pieces of ribbon cable) and run from one
> driver chip controller.  This arrangement will allow a straight line  
> or
> grids to be formed or gaps (several feet between sections of "strips")
> by having longer ribbon connects.
>
> Both of these designs and yet another qty 4000 1W LED design run at
> 30fps minimum.  (see website)
>
> All just FYI as data points.  The need for nice dimming and 30fps  
> drove
> the electronics part of the design.
>
> J
>


Your design specification said you chose to use the standard ArtNet  
protocol which which was limited to 4 DMX universes per IP address.   
You stated that you hacked this to provide an expanded number of DMX  
universes per IP address.  Is this expansion now the updated ArtNet  
protocol ?
Gus

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