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From: "logjam" <g...@cmosxray.com>
Newsgroups: sci.electronics.basics
Subject: Re: Wall of RAM
Date: 24 Jan 2006 02:39:45 -0800
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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.
