Thread: The RamWall...
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Old 05-10-2007, 01:33 AM
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: 24 Jan 2006 17:45:24 -0800
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logjam wrote:
> Just thought I'd give an update:
>
> -I've soldered 13,200+/-10 LEDs so far.
> -Of the 16oz of solder I started with only 7.25oz is left. My food
> scale isn't strong enough to weigh the cut off legs. My friend says he
> has a digital one, so I'll try to get that.
> -Only 5808 LEDs left. I have to finish this project by the 28th in
> order to save face to a friend I made a bet with.
>
> Keep pulling for me! I designed the column drivers. Looks like that
> will be a project too.
> Column Driver for 216 characters:
> -54 - 74HC04
> -27 - 74HC138
> -27 - 74HC133
> -27 - 74HC244
> -432 - 74HC574
> -216 - ULN2803
> -1728 - 24ohm resistor
> -etc
>
> This is one build, thats for sure. Preliminary calculations are
> showing 138.7A draw, 276watts of heat and 416watts of stuff other than
> heat. Should be bright enough.

Holy LED display Batman!
Keep it up, we want lots of progress photos and of the final thing!

Has anyone else ever done an individual project of this scale before?

Dave
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