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Volts has its own webpage? It’s where you go for
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10 TechKnowledgey 2010
Events, Advances, and News
A new approach to solar, a new
battleground in hacker wars, the world’s
smallest 64 GB SSD, plus other stuff
you’ll find interesting.
Projects & Features
34 Piezoelectric Film Speaker
Experiment with this unique piezoelectric material to
see what kind of audio sounds you can produce with
film and a little voltage.
■ By John Iovine
14 The Spin Zone
Adventures in Propeller Programming
Lighting Up the Season — Again!
24 Q & A
Reader Questions Answered Here
Attic fan control, seven-segment LED help,
a timer project, plus more.
38 Is Your Garage Door Open?
You’ll never have to wonder again with this
■ By Ron Newton
54 The Design Cycle
Advanced Techniques for Design Engineers
A Universal Micro Design.
60 Smiley’s Workshop
Programming • Hardware • Projects
Getting a Little Shifty.
44 Oscilloscope Probes and Probing
As you start probing higher and higher frequencies,
often the results get increasingly odder. This article
addresses the reasons for that strange behavior. The
ultimate solution to the shortcomings of your 10:1
probe is a very expensive Active Probe — but here is
one you can construct for $25.
■ By Robert Reed
68 Near Space
Approaching the Final Frontier
The Canon Hacker Development Kit — Part 2.
FUNdamentals For Beginners
Just getting started in electronics? Try these
simple demos to illustrate electronics principles
and how components function in actual circuits!
76 How a PNP Transistor Works
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