10 TechKnowledgey 2012
Events, Advances, and News
Read about a virus generator being developed,
a radio scrambler/descrambler, if Panasonic is sinking
... plus some other stuff you’ll want to know about.
14 Near Space
Approaching the Final Frontier
Balloonsats and Attitudes Toward Science.
20 Q & A
Reader Questions Answered Here
A driveway system hack, fan speed control,
and an LED array driver are some of the topics
discussed this time.
50 The Design Cycle
Advanced Techniques for Design Engineers
Riding 802.15.4 Radio Waves.
58 The Spin Zone
Adventures in Propeller Programming
68 Smiley’s Workshop
Programming • Hardware • Projects
Fritzing With the Arduino — Part 2.
Projects & Features
26 Build Your Own Magnetometer
One of the neatest gadgets made possible by
modern IC technology is a magnetometer.
Once you’ve built this one, you can use it to
measure a variety of things.
■ By William Baird
32 Talking T-Shirt Responds to
Make this interactive costume for exciting
Halloween thrills and chills.
■ By Gordon McComb
Cover photo provided by Matthew Roddy; model is Anais Noon.
42 A High Voltage Halloween
A powerful Van de Graaff generator can make
for some hair-raising Halloween fun!
■ By Walter Noon
24 NEW PRODUCTS
64 NV WEBSTORE
78 TECH FORUM
81 AD INDEX
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