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6 December 2014
10 TechKnowledgey 2014
Events, Advances, and News
Topics of interest this time include the world’s
fastest electric motorcycle, getting your own
cloud, taking your own ECG, preserving the CRT,
plus some other cool stuff.
Reader Questions Answered Here
Questions cover a battery monitor circuit, NiMHs
over NiCads, and using an audio synthesizer IC
with an eight ohm speaker.
18 The Spin Zone
Putting a Button On It.
Think there’s not a lot to say about implementing
buttons into your electronic projects? Guess again.
57 Smiley’s Workshop
Programming • Hardware • Projects
The Arduino Classroom.
Arduino 101/Chapter 11: Sound.
In order to make sounds using the Arduino,
you need to know about arrays and interrupts.
68 Getting Started With
Helpful Instructions to Create
Briding the Gap of Packaging
With 3D Printing.
The three main areas to designing a project are:
hardware, software, and packaging. While hardware
and software have come a long way over the years,
replicating custom enclosures has been on the
expensive side ... until now.
72 Near Space
Approaching the Final Frontier
CubSats — Part 1.
There’s a new breed of satellites in town with a lot
of potential to cost-effectively
and boldly go where
no man has before.
26 Synchronized Light Displays
Ready to give Clark Griswold a run for his money
with your next holiday display? Then, you’ll
appreciate these tips on the creative process
and an overview of putting together a basic
■ By John Storms
32 Build the 3D Christmas LED Tree
Brighten things up this holiday season with
your own home-built LED tree.
■ By Ron Newton
38 Make These Unique Xmas Earrings
If an LED Christmas tree is simply not enough bling
this year, then you’ll want to whip up a bunch of
these sparkly earring sets to make things even more
festive. Plus, they make great gifts.
■ By Ron Newton
44 Wishing You a Very Random Christmas
This flexible eight-channel light controller uses
random number generators to make sure your
holiday displays never look the same.
■ By Dan Koellen
51 PRODUCTREVIEW Boxed Kit Amps’ Gobo Stereo Amplifier
This is a fun to build desktop stereo amplifier kit
that is appropriate for any experience level.
■ By J. W. Koebel
The Art of Prototyping
24 NEW PRODUCTS
76 NV WEBSTORE
79 TECH FORUM
81 AD INDEX