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  #21  
Old 01-08-2006, 02:28 PM
Grant Stockly Grant Stockly is offline
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From: "Michael A. Terrell" <mike.terr...@earthlink.net>
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Subject: Re: Wall of RAM
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logjam wrote:
>
> Up here in Alaska we don't have much desert sun, so that might be a
> problem.
>
> Here is a picture of a 26x22 array. I got this far and then was worn
> out. Used a little over 500 LEDs on this one! I was worn out because
> the board was wired completely by hand. I would use a PCB from a
> company on this project...
>
> http://media.diywelder.com/images4/0...dback_1020.jpg
>
> http://media.diywelder.com/images4/0...front_1021.jpg


What part of Alaska? That's a very large area. I was there in '73 &
'74 at Ft Greely.

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
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  #22  
Old 01-08-2006, 02:28 PM
Grant Stockly Grant Stockly is offline
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From: "logjam" <g...@cmosxray.com>
Newsgroups: sci.electronics.basics
Subject: Re: Wall of RAM
Date: 4 Jan 2006 12:22:50 -0800
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I'm in Anchorage Alaska.

Another benefit of the RamWall is getting your room to look like part
of a borg space ship!

I had the 30x27 grid done, but then I remembered about a project I did
back in high school. I made a 8x11 character display that was big
enough to handle nice fonts. So to make the board more usable, I
changed it to a 30x33 grid. Then I decided that someone might only
want one row of characters not 3, so I designed the board so that it
could easily be cut into 3 pieces and reconfigured in any way desired.


The circuit board ended up being 12x13.2. a 30x33 grid cost the same
as 30x27, but it did take an extra 7,000 or so LEDs to fill in the new
space. There are 990 LEDs per circuit board and 18 circuit boards in
my display.

I should be able to display a NICE terminal font on the display, 9 rows
- 22 characters per row. Using a TINY font like those little store
signs and I should be able to fit 14x36, which is barely big enough for
lynx, wouldn't that be fun to see? Browse the web in green LEDs...

Here is one of the 3 rows:
http://media.diywelder.com/images4/0...l_v1_1_row.jpg

Here are all 3 rows:
http://media.diywelder.com/images4/0...ll_v1_full.jpg

The new finished dimensions are:
72 inches wide
40 inches tall

What do you think now? Too late to change my mind, the PCBs are
ordered.
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  #23  
Old 01-08-2006, 02:29 PM
Grant Stockly Grant Stockly is offline
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From: "David L. Jones" <altz...@gmail.com>
Newsgroups: sci.electronics.basics
Subject: Re: Wall of RAM
Date: 4 Jan 2006 17:02:59 -0800
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logjam wrote:
> A while back on ebay I was just looking around and came upon 50,000
> LEDs.
>
> Ebay is a dangerous place, I can understand how women go to the store
> and spend $800 window shoping.
>
> $300 later and I have 50,000 LEDs in the mail
>
> Anyway, I gave away around 1,500 to friends. I still have MANY of them
> left.
>
> I thought a "fun" project would be to create a "Wall of RAM". Now it
> would be fairly easy to emulate the ram and display the results on the
> wall using a CPLD, but what about actually making real ram?
>
> Does anyone think its possible to use capacitors and high current
> drivers to use the LED+capacitor combination as ram?
>
> The goal of the project would be a wall of cards, say 4k of ram max.
> This wall of ram would interface to either the Altair that I bought OR
> the Apple 1 kit that I bought on ebay.
>
> What do you guys think? It seems that with some RAS/CAS decoding logic
> that it shouldn't be too hard. The cons of this project are the cost
> of 4,096 capacitors and PCBs. The pros of the project are, well, it
> would look really neat.
>
> Tell me what you think.
>
> Grant

If they ain't BLUE LED's then don't bother, any other colour will look
lame! :->

Dave
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  #24  
Old 01-08-2006, 02:29 PM
Grant Stockly Grant Stockly is offline
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From: "Daniel Pitts" <googlegrou...@coloraura.com>
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Subject: Re: Wall of RAM
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logjam wrote:
> I should be able to display a NICE terminal font on the display, 9 rows
> - 22 characters per row. Using a TINY font like those little store
> signs and I should be able to fit 14x36, which is barely big enough for
> lynx, wouldn't that be fun to see? Browse the web in green LEDs...
I'm picturing a '70s scifi where they had an extra large green CRT,
complete with burnin :-)
If you put in a PCM driver to control intensity, you can do some truely
interesting effects.
Think plasma.
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  #25  
Old 01-08-2006, 02:29 PM
Grant Stockly Grant Stockly is offline
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Subject: Re: Wall of RAM
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On Wed, 04 Jan 2006 12:22:50 -0800, logjam wrote:

> I'm in Anchorage Alaska.
>
> Another benefit of the RamWall is getting your room to look like part
> of a borg space ship!
...
> Here is one of the 3 rows:
> http://media.diywelder.com/images4/0...l_v1_1_row.jpg
>
> Here are all 3 rows:
> http://media.diywelder.com/images4/0...ll_v1_full.jpg
>
> The new finished dimensions are:
> 72 inches wide
> 40 inches tall
>
> What do you think now?

Too much time on your hands, and _WAY_ too much money! ;-P

Cheers!
Rich



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  #26  
Old 01-08-2006, 02:30 PM
Grant Stockly Grant Stockly is offline
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logjam wrote:
> I don't know. These aren't very bright LEDs.
>
> Here is what 1kbyte would look like:
> http://media.diywelder.com/images4/060102-1kvisual.jpg
>
> and a 1 to 1 scale:
> http://media.diywelder.com/images4/0...visual1to1.jpg
>
> You may think its crazy...but what am I supposed to do with my 50,000
> LEDs???

You could sell them on ebay.


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  #27  
Old 01-08-2006, 02:30 PM
Grant Stockly Grant Stockly is offline
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On 2006-01-05, Daniel Pitts <googlegrou...@coloraura.com> wrote:
> logjam wrote:
>> I should be able to display a NICE terminal font on the display, 9 rows
>> - 22 characters per row. Using a TINY font like those little store
>> signs and I should be able to fit 14x36, which is barely big enough for
>> lynx, wouldn't that be fun to see? Browse the web in green LEDs...
> I'm picturing a '70s scifi where they had an extra large green CRT,
> complete with burnin :-)

one of the X windows screen savers emulates pong on a TV complete with
low level snow, slow phosphor, gaps between the scan lines and loss of
sync near the bottom, of the screen.

> If you put in a PCM driver to control intensity, you can do some truely
> interesting effects.
> Think plasma.



Bye.
Jasen
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  #28  
Old 01-08-2006, 03:09 PM
Grant Stockly Grant Stockly is offline
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From: "logjam" <g...@cmosxray.com>
Newsgroups: sci.electronics.basics
Subject: Re: Wall of RAM
Date: 8 Jan 2006 16:20:44 -0800
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Here is an update:

PCB Top:
http://www.stockly.com/images2/06010...B_Top_2603.jpg
PCB Bottom:
http://www.stockly.com/images2/06010...ottom_2604.jpg

I should have made the power traces bigger, oh well...

Here are some friends I convinced to help me:

http://www.stockly.com/images2/06010..._John_2616.jpg

We put the couch on spacers, put a table in front of it, and watched
SciFi Friday...

http://www.stockly.com/images2/06010..._Back_2617.jpg

http://www.stockly.com/images2/06010..._John_2612.jpg

Here is 1 of the 18 required panels, finished. 990 LEDs!

http://www.stockly.com/images2/06010..._done_2618.jpg
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  #29  
Old 05-10-2007, 01:32 AM
Grant Stockly Grant Stockly is offline
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Subject: Re: Wall of RAM
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logjam wrote:
> Here is an update:
>
> PCB Top:
> http://www.stockly.com/images2/06010...B_Top_2603.jpg
> PCB Bottom:
> http://www.stockly.com/images2/06010...ottom_2604.jpg
>
> I should have made the power traces bigger, oh well...
>
> Here are some friends I convinced to help me:
>
> http://www.stockly.com/images2/06010..._John_2616.jpg
>
> We put the couch on spacers, put a table in front of it, and watched
> SciFi Friday...
>
> http://www.stockly.com/images2/06010..._Back_2617.jpg
>
> http://www.stockly.com/images2/06010..._John_2612.jpg
>
> Here is 1 of the 18 required panels, finished. 990 LEDs!
>
> http://www.stockly.com/images2/06010..._done_2618.jpg

Crikey, you are serious!
One of those competely pointless but fun projects - love it!
Gotta see photos of the final thing, keep us updated!

Dave
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  #30  
Old 05-10-2007, 01:32 AM
Grant Stockly Grant Stockly is offline
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From: "Rich Grise, but drunk" <yahri...@example.net>
Subject: Re: Wall of RAM
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On Fri, 06 Jan 2006 06:43:45 +0000, Jasen Betts wrote:

> On 2006-01-05, Daniel Pitts <googlegrou...@coloraura.com> wrote:
>> logjam wrote:
>>> I should be able to display a NICE terminal font on the display, 9 rows
>>> - 22 characters per row. Using a TINY font like those little store
>>> signs and I should be able to fit 14x36, which is barely big enough for
>>> lynx, wouldn't that be fun to see? Browse the web in green LEDs...
>> I'm picturing a '70s scifi where they had an extra large green CRT,
>> complete with burnin :-)
>
> one of the X windows screen savers emulates pong on a TV complete with
> low level snow, slow phosphor, gaps between the scan lines and loss of
> sync near the bottom, of the screen.
>
>> If you put in a PCM driver to control intensity, you can do some truely
>> interesting effects.
>> Think plasma.
>
>
>
> Bye.
> Jasen

I just checked my KDE screensavers, and DEWD! There sure are some kewl
ones!

Cheers!
Rich
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