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LPD-6803 Pixel RGB led module (suitable for pov...) help
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LPD-6803 Pixel RGB led module (suitable for pov...) help

by islisis on Sat May 15, 2010 6:02 pm

Apart from the "dream/magic color" led strips featured in projects like
http://www.instructables.com/id/Too-coo ... -Headband/
there are some other IC varieties of pixel RGB leds which have 32 controllable shades per channel which I am currently looking for programming information on.

In particular there is this pixel module which I believe uses a LPD-6803 chip and compatible controller I am interested in testing:

http://www.alibaba.com/product-gs/22050 ... etter.html

http://www.alibaba.com/product-gs/29401 ... oller.html

Many other varieties of LPD-6803 based "pixel rgb led" modules can be found.

The LPD-6803 appears suitable for video and perhaps better for the POV strip application I have in mind. The only sources of information on the web I have found on this chip so far are:

http://translate.google.co.jp/translate ... =firefox-a (translated from German)

http://www.mikrocontroller.net/attachme ... PD6803.pdf (in Chinese)

and some documents I have not yet registered to see on pudn.com

This would be my ideal platform to program for on Arduino, so any comments or advice on how plausible this chip looks to control would be gladly appreciated!
islisis
 
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Re: LPD-6803 Pixel RGB led module (suitable for pov...) help

by Entropy on Mon May 17, 2010 9:59 am

This chip may or may not be the same one used by doityourselfchristmas.com user "mrpackethead". If so, he has definately figured out how to control these - http://www.youtube.com/watch?v=GAt6A98lXQw

Last I checked he was eventually going to release a DIY controller, but it isn't out (and hence no protocol documentation) yet. He and his development partner had to reverse engineer the protocol since the only datasheet they could find was in Chinese.

Part of the reason this chip doesn't seem to be sold domestically in the USA seems to be patents held by Color Kinetics and Philips/NXP
Entropy
 
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Re: LPD-6803 Pixel RGB led module (suitable for pov...) help

by islisis on Tue May 18, 2010 2:20 pm

thank you *very* much for that info!

i think you are on the money...

http://response-box.com/rgb/

now, to think whether it's worth the time to hack yourself!
islisis
 
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Re: LPD-6803 Pixel RGB led module (suitable for pov...) help

by Entropy on Wed May 19, 2010 2:50 pm

islisis wrote:thank you *very* much for that info!

i think you are on the money...

http://response-box.com/rgb/

now, to think whether it's worth the time to hack yourself!

I'd expect more protocol docs to pop up over the next year over at DIYC now that those pixel strands have popped up on Alibaba. A few people plan on playing with them, but it's a bit late in 2010 for "new" projects - most people have rough plans for technologies to use in their 2010 shows already.
Entropy
 
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Location: Owego, NY USA

Re: LPD-6803 Pixel RGB led module (suitable for pov...) help

by JohnDowdell on Thu May 20, 2010 1:23 pm

wow that is a lot of individually controlled leds on the mega tree.

If you have no luck with lpd-6803, have a look at ON semi's CAT4103
http://www.onsemi.com/pub_link/Collateral/CAT4103-D.PDF
JohnDowdell
 
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