Led sign effects!

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Friends see this video.
It's a 32X128 green led array and it's single color.it has superior intensity and very nice effects.do you have any idea how they made these effects?and how they get this intensity?

get the video from here
http://rapidshare.com/files/3228...

or see it on youtube
http://www.youtube.com/watch?v=b...

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Last Edited: Mon. Dec 21, 2009 - 08:10 AM
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after dling, it says invalid sample type. will media player play an mp4?

Imagecraft compiler user

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you can use kmplayer to watch the video.it's a free software.

I love Digital
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I mentioned XMOS earlier. Here is a demo of their chips driving an LED display:

http://www.youtube.com/watch?v=eLyn2Ghq_oE

It has an Ethernet connection, the XMOS chips can do 100 Mbit/s Ethernet in software.

Leon Heller G1HSM

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RapidShare wrote:
This file can only be downloaded by becoming a Premium member

There are no more download slots available for free users right now. If you don't want to become a premium member, you might want to try again later.

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I wish that people didn't use Rapidshare, I abandon downloads as soon as I see it.

Leon Heller G1HSM

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As it's a video, why not just post it on youtube? [or vimeo or any other video-sharing site]

Writing code is like having sex.... make one little mistake, and you're supporting it for life.

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Quote:
get the video from here
http://rapidshare.com/files/3228...

Trying, I got this

Quote:
You want to download the following file:

http://rapidshare.com/files/3228... | 3195 KB

This file can only be downloaded by becoming a Premium member

There are no more download slots available for free users right now.

Which I read as: "We are fooling you into thinking that a free service is offered here. When we see that you are about to swallow the beit we will try to lure you into sending us money."

No wrong in charging money for services, but theese kind of scams makes me pissed off.. No video watching for me.

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I looked at it, and its an arabic script that flows and seems very liquid, like a network quality video wipe. The sign itself is a hi intensity green led (looks like). I think things like this are cooked up with alias wavefront or a high end video workstation and saved as a video file of some sort... the sign can just play back 60 fps video using Low Voltage Differential Signalling like a regular lcd screen.

Imagecraft compiler user

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Ok
I upload it on youtube
here is the link
http://www.youtube.com/watch?v=b...

I love Digital
and you who involved in it!

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Quote:
t's a 32X128 green led array and it's single color.it has superior intensity and very nice effects.do you have any idea how they made these effects?and how they get this intensity?

The video is difficult to see. The green light is too bright for your camera settings.

I would assume that it is vaccuum flourescent rather than LEDs. And the matrix must be far bigger than 32 x 128.

Regarding the display speed: a regular ks0108 display can be updated far faster than that. (obviously more resolution takes longer)
Scrolling effects can also be done very fast if you just use the controller hardware.
But a full size commercial display will have dedicated drivers and controllers. Even normal techniques of uploading data to non-display buffers, an instant change of display pointers look very dramatic.

David.

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Quote:
I would assume that it is vaccuum flourescent rather than LEDs. And the matrix must be far bigger than 32 x 128.

I have counted the led's and it's 32x128 pixle and all of the pixel's are super high bright led's.I think they made the animation with pc and just use an ordinary avr to show the pre-made animation.
my question is that with what software can we make animations like this

I love Digital
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The LEDs are certainly bright. I would suggest that the display is 128 x 32 rather than 32 x 128.

You can produce the animation with a regular AVR. Why not do some experiments with a regular glcd display?

Your video looks to me like text with some effects. I am not an arabic reader. The scrolling effect is easy. The letter rotation is just rotation of a bit-map that probably got loaded from a font.

I have an old LED moving message display. You program it with regular ascii text and embedded effect control sequences. It can look quite impressive.

Now your sign is obviously loading text, changing fonts, adding effects, changing light intensity. And I suspect is displaying an occasional bit-map. I expect you can do all of this with a mega32 and both sequences and fonts in eeprom.

But if you replace the eeproms with an SD card reader, you can avoid any AVR intelligence. Just blit out the whole series of frames from the GigaBytes of SD memory.

Personally I would find the intelligent approach more interesting. But realistically SD is so cheap, you produce your animations on a PC and plug in a fresh card.

David.

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hello david.
I agree with you but i want to know the name of pc software that can produce text effects in single color format

I love Digital
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Quote:

Why not do some experiments with a regular glcd display?

Perhaps even easier would be to blit something onto the screen in a Windows app. The bitmap manipulation you deveop there will work equally well when you finally implement on an AVR driven design but it's MUCH easier to develop on a PC.

On the PC you will have access to (for example) Windows font APIs so can blit any size/shape of text (then rotate or whatever). If you scale the output to the final desired bitmap size (128x32 or whatever) then you can simply output raw frames of 128x32 for the animation and on an AVR it's then no more complex than blitting entire bitmaps at the frame rate from a storage medium such as SD (making it easily updateable from the PC program)

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Try Windows Movie Maker.

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I have seen swishmax program.it's based on adobe flash and can make realy great text animations in seconds.but the output data is in falsh.you can convert the output data to avi but the conversion does not goes well and some of the pixles are get wrong data.and the other problem is the out put is not in single color format.do you have any suggestion

I love Digital
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Flash likely uses lots of antialiasing (maybe even subpixel) and that does not work too well on a very low resolution display, and certainly not on a simple LED matrix. So a 128x32 animation might look fantastic on your computer, but when reduced to 1 bit colour depth it looks awful.

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Maybe take a look at DMX lighting software software...

There is one call Madrix IIRC that would do what you want...
There is also the open source & free DMXControl as well as a matrix plug in for it but it's meant for RGB...
Canvix might also do it... It's been a while since I looked at that kind of stuff...

You also might want to see if resolume will output to a LED matrix...

Michael