Thread: The RamWall...
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Old 01-08-2006, 02:24 PM
Grant Stockly Grant Stockly is offline
Join Date: Jan 2005
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From: Rich Grise <>
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Subject: Re: Wall of RAM
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Date: Tue, 03 Jan 2006 15:50:03 GMT
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On Sun, 01 Jan 2006 19:25:50 -0800, 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


> Does anyone think its possible to use capacitors and high current
> drivers to use the LED+capacitor combination as ram?

Yes, but it'd be a nightmare to design; you'd have to come up with
a whole refresh scheme. I'd use flip-flops or real 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?

I think you're crazy, but it does sound like a kewl idea. :-)

> 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.

If you want to do it, (and have the cash) do it. "If you build it,
they will come". :-) Take pictures, and _then_ see what other people
think. :-)

Good Luck!
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