My 32x RGB LED board

[EEVblog]

Jeez that's mad! Any idea what it does, presumably a text/graphic panel?

The guy bought 50,000 LEDs on ebay and wanted to do something with them.
He called it the "wall of RAM", so had some idea of making it mimic the RAM contents on his Altair or something.
Never saw photos or video of it actually working.
It was on sci.electronics.basics quite a few years back.

Dave.

[Mechatrommer]

dont know how much driver ic's they are going to need for that. looking at the LEDs alone is mad, i think the driver circuit will be just as worst.
i just dont have enough time for those. so i just purchase preassembled matrix from sureelectronics ebay, totalling 1000+ leds, including the ic's and shiiping cost me about $50. i have another 100+ bare 5mm leds incl resistor that cost me somewhere near $10. not RGB though.

[Simon]

Jeez that's mad! Any idea what it does, presumably a text/graphic panel? The web site behind it is just an Altair kit forum. A friend of mine built an interactive LED table from 12 or so kit panels, the same panels as this:

 

I must make one of these one day, I have a coffee table frame with no glass ready to take it

[Mechatrommer]

I must make one of these one day, I have a coffee table frame with no glass ready to take it

make sure you have your co-workers in, otherwise, u'll have a lot of headache!

[Simon]

why ?

[Mechatrommer]

why ?

do it then u'll know. as a general rule, there is no easy way to become a great man, but, who knows... you maybe the one!
i thought you were talking about the 19K LEDs panel 

[Simon]

nah just the water ripple effect table, that's and awsome effect

[EEVblog]

The completed RGB display panel with 4 x 1x4 RGB modules on custom smoked perspex stand (funky laser cut name removed to protect the innocent), ready for the trade show display.

Total turn-around time including module board design and manufacture, custom display stand, assembly (DaveCAD assembly services), and design debug and mods - less than a week.

Dave.

[.o:0|O|0:o.]

Less than a week... That's incredible!

I would be interested in seeing more photos or a demo. Have you programmed anything interesting into it yet?

.o:0|O|0:o.

[Mechatrommer]

Less than a week... That's incredible!

you must be a great man to be able to do that, and as i said earlier, its not an easy path. Dave is known to have built something more complex than that. this leds thing is just a toy to him

[EEVblog]

Less than a week... That's incredible!

you must be a great man to be able to do that, and as i said earlier, its not an easy path. Dave is known to have built something more complex than that. this leds thing is just a toy to him

It can be just as big a pain in the arse as a system 100 times as big and complex!

Dave.

[Simon]

I expect that in principle it is simple, it is the logistics of so many units all being controlled at the same time

[adam1213]

By coincidence, I'm working on this RGB display design today

what controller(s) are you using?


video cases are a convenient size to use as case for some dot matrix displays

[Mechatrommer]

...assembly (DaveCAD assembly services)...

i just noticed this, i thought its some highly specialized professional assembling service, but.... when looking carefully at the name... it is indeed!

[DJPhil]

...assembly (DaveCAD assembly services)...

i just noticed this, i thought its some highly specialized professional assembling service, but.... when looking carefully at the name... it is indeed!

I still have a copy of DaveCAD from one of the earlier videos. 

[Zad]

Following on from this (and the latest Amp Hour Blog) I saw this on Hacked Gadgets today.



Not exactly pro, but cool nevertheless. I'm surprised the micro has enough horsepower to refresh all those LEDs without flicker or tearing. Which reminds me of a couple of educational blog entries I keep meaning to write. Much respect to all those bloggers who can somehow make time to create what seems like dozens of articles a week!

[abbtech]

Nah, THIS is hardcore!
19008 LED's

1.5kg of leftover pins!


Dave.

I feel tired just thinking about soldering all those connections!

[allanw]

Thanks for mentioning this on hackedgadgets.com. Actually getting some traffic now

[allanw]

Got the boards from pcbcart. They look pretty good:

[abbtech]

Those boards looks great. There is something really sexy about the black solder mask with white silk screen. I went with the same combo on this board and I love the way it came out (also done at PCBCart).
http://alan-parekh.vstore.ca/gear-clock-circuit-board-p-106.html

[FreeThinker]

You've got a long way to go to beat this!
http://www.elektor.com/news/5-8-million-leds-create-an-image-of-mount-fuji.1601943.lynkx?utm_source=UK&utm_medium=email&utm_campaign=news. Now that's some LED display!

[ddrl46]

You should never buy anything from sparkfun, they ask about twice or sometimes even 4 times the price of the same product somewhere else.

[aerohoff]

Yeah, you should only buy directly from china or walmart

I saw Dave's display at the Arm Techcon this week. If I'd realized Dave was behind it, I'd have spent more time getting to know them. They broke the board right at the beginning of their presentation, and the engineer type had to scramble to fix it while the marketing type started the presentation. Fun times.
 

[vaneenbergen]

hi all

this is my led hobby board i made


during the first test
http://video.google.nl/videoplay?docid=843568223430970219#

these are 1500 panels with 16 rgb's each.
all controlled by 10/100mbit ethernet and rs485.

i made this as a hobby/test project to test my network equipment that i develop for lighting control of big shows.

joost van eenbergen

[abbtech]

hi all

this is my led hobby board i made


during the first test
http://video.google.nl/videoplay?docid=843568223430970219#

these are 1500 panels with 16 rgb's each.
all controlled by 10/100mbit ethernet and rs485.

i made this as a hobby/test project to test my network equipment that i develop for lighting control of big shows.

joost van eenbergen

Wow that is a cool looking project. Is there a write up on it somewhere?

Alan