Path: g2news1.google.com!postnews.google.com!z14g2000cwz .googlegroups.com!not-for-mail
From: "logjam" <g...@cmosxray.com>
Newsgroups: sci.electronics.basics
Subject: Re: Wall of RAM
Date: 24 Jan 2006 02:39:45 -0800
Organization:
http://groups.google.com
Lines: 25
Message-ID: <1138099185.523514.24280@z14g2000cwz.googlegroups. com>
References: <1136172350.049224.231720@o13g2000cwo.googlegroups .com>
<1136173371.832018.44540@g44g2000cwa.googlegroups. com>
<1136179693.825070.183100@g43g2000cwa.googlegroups .com>
<5c60.43b8f53a.d0b55@clunker.homenet>
<1136203193.354765.163350@o13g2000cwo.googlegroups .com>
<a3259$43b99411$d844260c$5737@FUSE.NET>
<1136239984.338696.151020@g14g2000cwa.googlegroups .com>
<1136449750.355847.145030@g43g2000cwa.googlegroups .com>
NNTP-Posting-Host: 69.178.21.108
Mime-Version: 1.0
Content-Type: text/plain; charset="iso-8859-1"
X-Trace: posting.google.com 1138099190 6117 127.0.0.1 (24 Jan 2006 10:39:50 GMT)
X-Complaints-To:
groups-abuse@google.com
NNTP-Posting-Date: Tue, 24 Jan 2006 10:39:50 +0000 (UTC)
In-Reply-To: <1136449750.355847.145030@g43g2000cwa.googlegroups .com>
User-Agent: G2/0.2
X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax),gzip(gfe),gzip(gfe)
Complaints-To:
groups-abuse@google.com
Injection-Info: z14g2000cwz.googlegroups.com; posting-host=69.178.21.108;
posting-account=aBFcgg0AAAB82nqHKVyZXRJDEB6Qpe25
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.