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N&V July 2005
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Features

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Blog
by Edward B. Driscoll, Jr.
Your New Home on the Internet Awaits Page 67

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The Field Effect Transistor
by Dan Shanefield
A Necessary Device for the Modern IC Page 71

Projects

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PIC-based Motorcycle Gear Indicator

by Dan Gravatt

A while back, a friend of mine with a Suzuki Katana motorcycle sent me some plans he pulled off the Internet for circuits that would tell him what gear his motorcycle was in while he zipped down the highway. Since I’d helped him with some other electrical and electronic projects for his bike, he figured I could build one of these for him. I looked over the schematics he had found but wasn’t too impressed — most were for “strip gauges” which lit a different LED for each gear... Page 38

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Battery Analyzer for RC Power

by Alonzo Trueland

This battery analyzer project is designed to test the “health” of battery packs used in radio-controlled vehicles to drive their motors. An effective way to test the health of a battery pack is to place a normal operating load on a fully charged pack, and then record the voltage levels while it is discharging through a test load. The information produced from the recorded data will create a graphical “discharge curve” that can be used to examine its performance level and determine the health of Page 42

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The Ultimate Utility Meter - Part 1

by Michael Simpson

In December 2001, I wrote an article in Nuts & Volts called the “Digital Utility Meter.” It was a great success and many readers built the meter. I think the reason it turned out so well was the fact that I used the meter to aid in many of my own projects. Page 50

Columns

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Techknowledgey
by Jeff Eckert
Techknowledgey 2005
Events, Advances, and News Page 12

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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 16

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Let’s Get Technical
by James Antonakos
Optical Illusion and the Light Emitting Diode
My three-year-old daughter recently became fascinated by a small hand-held electronic toy that spins a disk round and round very quickly (see Figure 1). Light emitting diodes (LEDs)mounted on the edge of the disk turn on and off in all sorts of interesting patterns. Those familiar with my background in electronics will recognize that I cannot stand idly by, watching this $10.00 toy flash its lights at me without beginning to think about how to do it myself. Page 24

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Stamp Applications
by Jon Williams
Getting Hot, Hot, Hot
Like the BASIC Stamp, the Maxim/Dallas DS1620 has been around a long time and has been a big part of my temperature-based projects. Yet in all this time, I had never explored the high-resolution use of the DS1620. “High resolution?” you ask. Yeah. With just a little bit of extra work, we can get temperature resolution to 0.05 degrees Celsius (0.09 degrees Fahrenheit) from our old stand-by. How is this possible? Page 26

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In The Trenches
by Gerard Fonte
Managing Engineers
This article is going to be somewhat different from the past ones. Instead of addressing a topic that is directly applicable to engineers, I will look an important indirect topic. Page 78

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Micro Memories
by Edward B. Driscoll, Jr.
Silicon Valley’s Computer History Museum Finds a New Home
The article that inspired this series of Micro Memories columns first ran in the July 2001 issue of Nuts & Volts, and featured Silicon Valley’s Computer History Museum, then located in rather Spartan quarters — a Quonset hut located on the Moffett Field airbase in Mountain View, CA. Page 8

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Near Space
by L. Paul Verhage
BalloonSats
The BalloonSat program is an effort by the Space Grants of several states to capture the interest and imagination of college — and in some cases — high school students through a space flight experience. BalloonSats are miniature near spacecraft. They are limited in weight and carry only a simple data logger, sensors, and small camera. Students can quickly construct and test BalloonSats. BalloonSats carry no tracking equipment, therefore, they’re carried as cargo on an amateur near spacecraft. Page 87

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