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N&V September 2005

N&V September 2005
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Product ID : SKU15936

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Features

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The Compucolor II
by Tom Napier
If the home computer can be said to have had a Golden Age, it ran from the late 1970s to the early 1980s. Back then, there were dozens, if not hundreds, of computers from which to choose. Magazines compared brand-to-brand, operating system-to-operating system. Page 48

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Capacitors - The Family Tree
by H. Ward Silver
There are many different choices when it comes to capacitor types. Find out why and how to tell which one is right for your project. Page 55

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Generating Analog Waves From Digital Signals
by Gerard Fonte
From the digital designer’s perspective, it’s unfortunate that the real world is analog. While many low-cost microprocessors (uP) have A/D (Analog-to-Digital) inputs, I am not aware of any common and inexpensive uPs that have real D/A (Digital-to-Analog) outputs, although the Microchip PIC 1400 does have two crude 4-5 bit analog outputs. Naturally, this shortcoming is sorely missed when creating any type of analog control application, as well as many other applications. Page 61

Projects

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Pool Timer

by Michael Simpson

About a year ago, when I created a floating pool light and shared it with readers, I received a number of positive responses. Around the same time, I also developed a pool timer. I’ve since refined the project and developed a new prototype, which I’ve outlined here. Page 32

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Build An RC Car On The Cheap

by Bill Donofrio

Versatile Circuit Allows For Personal Customization Page 37

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Instant Replay

by Dave Prochnow

Add A Digital Recorder To An FM Radio Page 42

Columns

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Q&A
by TJ Byers
Q&A
In this column, I answer questions about all aspects of electronics, including computer hardware, software, circuits, electronic theory, troubleshooting, and anything else of interest to the hobbyist. Page 12

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Micro Memories
by Edward B. Driscoll, Jr.
The Computer That Took Man To The Moon
Even though the last Saturn V flew some 40 years ago, the Apollo moon landings remain one of mankind’s greatest engineering efforts. What makes them even more impressive was the era in which they were designed. Page 18

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Let’s Get Technical
by James Antonakos
Making The Illusion Real
In my last article, I challenged myself to duplicate the interesting patterns created by five small LEDs mounted on a spinning disk (Figure 1). My three-year-old daughter does not know that I have taken her $10 toy apart to assist in my investigation, so I may end up in a miniature doghouse (or possibly even Clifford’s) if I cannot get the original device, or my creation, working. Page 22

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In The Trenches
by Gerard Fonte
Software Development
From time to time, most engineers are required to develop software. Some have training for this and others don’t. Sometimes the training is inappropriate for the task at hand. This month, we’ll look at approaches and considerations that are important in developing good software. Page 76

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Techknowledgey
by Jeff Eckert
Techknowledgey 2005
Events, Advances, and News Page 8

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Near Space
by L. Paul Verhage
The Space Elevator
Today, payloads are hurled into space on (still) expensive rockets. To get the best performance, these rockets push their design to the limit. And, as a result, considerable time and many people are required to build and prepare a rocket for launch. It’s the cost of paying salaries that makes rocket launches so expensive; rocket fuel is actually cheap. Page 82

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