PROJECTS and FEATURES
36 BUILD A WIRELESS WEATHER
SYSTEM: FINAL FIXES AND
Learn how to utilize the new
XBee modules, plus add an LCD
■ By Michael Simpson
42 A SIMPLE SUPERHET
This easy to construct receiver is
surprisingly sensitive and selective.
■ By John E. Post
50 ELECTROMAGNETIC COIL
Design and build a portable,
self-contained launcher for your
projectile of choice.
■ By Karl P. Williams
58 HOW TO CHOOSE AN
Learn how to wade through the
jargon to select the best op-amps.
■ By Gerard Fonte
68 DESIGNERS GUIDE TO RELIABLE
OSCILLATORS AND TIMERS
Common problems in the design of
digital oscillators and their remedies
■ By Norm Looper
72 21ST CENTURY ELECTRIC GUITAR
Discover the interplay between the
Fretlight guitar and a PC which can
help beginning guitarists learn basic
rock riffs and songs quickly.
■ By Ed Driscoll
Events, advances, and
news from the electronics
14 GETTING STARTED
20 PERSONAL ROBOTICS
Electric car battery
charger, how to monitor
series cells, more.
76 THE DESIGN CYCLE
84 NEAR SPACE
The 2007 Spaceward
92 NV WEBSTORE
32 NEW PRODUCTS 102 TECH FORUM
105 AD INDEX
96 STAMP APPLICATIONS
It’s in the cards ...
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