LED RGB Chases

[DZA Technical]

Hello all,

 

 

We have installed an RGBW Led tape into a clients garden today. We have the means to control via programmable DMX, but no DMX profiles, Or ability to recall them...

 

The DMX channels are as follows:

 

001 Warm White (separate chip)

002 Blue

003 Green

004 Red

 

Can anyone advise a decent sequence through these colours to get the nice chase through colours sort of look...

 

DG

[niclights]

Your best chance with a chase is probably to program steps that follow the colours of a rainbow. Effects generators in consoles use out of phase sine wave modifiers which you can't replicate with linear fades.

[norty303]

Most desks should support generic 3ch and 4ch LED fixtures. Just patch as many as you have pixels.

As niclights says, you're probably better off using FX generators for this than trying program it as steps.

[Tomo]

A rainbow chase in RGB (or indeed RAGB) is a linear-fade chase using the colours in that order.

 

R@FF, G@00, B@00 (Red)

R@FF, G@FF, B@00 (Yellow)

R@00, G@FF, B@00 (Green)

R@00, G@FF, B@FF (Cyan)

R@00, G@00, B@FF (Blue)

R@FF, G@00, B@FF (Magenta)

 

Zero wait time between steps, and adjust fade times until it looks 'right' (these depend entirely on the specific emitter colours)

 

Unfortunately there isn't really any simple and useful way to include a White emitter.

- White 'pastelises' the underlying colour, so if you can run two chases at different speeds then fading white up and down at a different rate to the rainbow you might get something interesting.

[timsabre]

Um, I would argue that you don't go to full red, full green for "yellow" as this makes the yellow too bright compared to the red. Depending on the dimmer curve you'd maybe go to 75% red, 75% green. As Niclights says the best rainbow effect is done using out of phase sine waves so you'd never get two channels at full together.

[Tomo]

Um, I would argue that you don't go to full red, full green for "yellow" as this makes the yellow too bright compared to the red. Depending on the dimmer curve you'd maybe go to 75% red, 75% green.

True. The intensities of each 'on' step do depend entirely on the specific emitters.