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4 October 2015
06 TechKnowledgey 2015
Events, Advances, and News
This time, read about taking another stab at
GW detection, a really big tablet, easy cable tracing,
an instrument of torture, plus some other cool stuff.
10 The Spin Zone
May the G-Force be with You.
Badges? We don’t need no stinking badges.
Unless, they’re Parallax’s new hackable Conference
types complete with a three-axis accelerometer.
Reader Questions Answered Here
Topics answered include drone mechanics,
PID control, and music editing.
60 Practical 3D Printing
Real World Uses for the
3D Print Designs for Electronic Hobbyists.
Discover some handy tools to print that will make a
welcome addition to your work bench.
62 Near Space
Approaching the Final Frontier
GPSL 2015 and My 150th Near Space
Highlights from this year’s Great Plains Super
Launch conference and commemoration of Paul’s
150th adventure into the great beyond.
68 The Design Cycle
Advanced Techniques for
From Data Logger to On-Demand Data
Roland Riegel, Bill Greiman, and the folks at
SparkFun laid the ground work for the OpenLog.
OpenLog was originally designed as an “out of the
box” data logger. We’re going to add some
PIC32MX electron spice to the OpenLog design and
turn it into an “out of the box” general-purpose
microSD-based storage device.
22 Setting Up a Test Bench
What equipment do you really need for monitoring
and testing all your projects?
■ By Robert Reed
31 Understanding Harmonics
Harmonics form a base line for testing, comparing,
and explaining various circuits. This short tutorial
shows how you can systematically look at the
structure of complex circuits using a simulation
program and building block approach.
■ By Richard Agard
36 Breaking the Arduino Speed Limit
— Part 2
This continuation of the March 2014 article on just
how fast you can push an Arduino offers a solution
to previous clock glitches, adds a serial LCD screen
that leaves more pins available, and introduces an
eight-bit fast ADC. Then, you put everything together
to make an even nicer digital storage oscilloscope.
■ By Bob Davis
42 Meet the ESP8266
It’s not all that often that a new piece of hardware
comes along that immediately captures the attention
of the builder community. The ESP8266 is the newest
example of this. It’s only about the size of a nickel,
yet contains a powerful 32-bit microcontroller and a
Wi-Fi interface, plus you can buy it for around $4.
■ By Craig Lindley
48 Silent Sensors
Ferroelectric capacitors can help take the mystery
out of event detection, and save the results to
report on them later.
■ By Joe T. Evans, Jr. and Spencer T. Smith
53 Vintage Computing —
I Still Adore My 64
Next in our Vintage Computing series is how to
emulate a Commodore 64 home computer on your
■ By Jim Lawless
Are We There Yet?
20 NEW PRODUCTS
76 NV WEBSTORE
80 TECH FORUM
82 AD INDEX
It’s Back! Our Workbench Design Challenge!
Details on Page 30!