Circuit Cellar №5 (322) 2017.pdf

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MEASUREMENT & SENSORS
MAY 2017
ISSUE 322
WI-FI PLOTTER
CONTROL
SoC-Based Design, Firmware,
Algorithms, & More
Q&A: Inside an Adaptive Robotics Lab
Do-It-Yourself Plotter Controller |
Ground Penetrating Radar | The JEADI ARM Pt. 2 | More iOS-Based Data Acquisition
Automatic Control 101 | WWVB Reception vs. SDR Hardware | MIDI Design Pt. 2 |
Additional Embedded Consulting Tips
The Future of NoC Architectures
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CIRCUIT CELLAR • MAY 2017 #322
MEASURE, SENSE, AND SUCCEED
Issue 322 May 2017 | ISSN 1528-0608
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Like many of the electronic systems we use every day (e.g., home appliances
and alarm systems), most of the projects presented this issue rely heavily on
sensor- and measurement-related components. Whether you’re using a $200
3-D printer or a $50,000 automated industrial robot, each system’s use value
is directly proportional to its ability to accurately measure and interact with the
objects in its vicinity. In this issue, several engineers provide tips, tricks, and
insights that will help you to successfully fine tune your next project’s measurment
and sensing capabilties.
Starting on page 10, Miguel Sanchez presents his recently completed Wi-Fi
pen plotter controller project. After describing the SoC-based hardware, he covers
the project’s essential firmware and algorithms.
Radar technology has revolutionized military and surveillance systems. This
month, Nishant Mittal introduces ground-penetrating radar technology and
explains how it’s used in military-related surveillance applications (p. 17).
Turn to page 22 for the second installment in Brian Millier’s series about
using iOS for data acquisition and control purposes. This time he covers the I
2
C
communication protocol for the IAQ-CO module and more.
Last month, Abdul Refay, Mike Smith, and Jason Long presented the first part
of their detailed series about the JEADI ARM project. This month they follow up
with an explaination of how they use the on-board LEDs and buttons to drive a
virtual car on a hard-coded test path (p. 36).
Adaptive robotics is a growing field. On page 44, we present an interview with
Henk Kiela from the Adaptive Robotics Lab in Einhoven, Netherlands. He talks
about the history of innovation in Eindhoven (e.g., Philips and ASML) as well as
how a new breed of robots will revolutionize manufacturing and industry.
On page 53, Bob Japenga continues his series on building a successful
embedded systems consulting company. Whether your focus is embedded
software development or embedded hardware, you’re sure to find his advice
helpful and immediately applicable.
Turn to page 56 for a thorough introduction to the basic principles of automatic
control. George covers a simple closed-loop system, common control laws, and
proportional system shortcomings.
On page 60, Ed Nisley describes some SDR hardware with which he has
worked. He also shows some RF signal spectra and explores short-term variations
affecting the RF arriving at the receivers.
This month, Bachiochi wraps up his series, “MIDI Beat Box” (p. 68). He covers
the Trellis keypad, which is used to trigger the MIDI player, as well as the topics
of recording and sampling.
We close this issue with an interesting essay on the future of network-on-chip
(NoC) architectures (p. 80). Georgia Tech professor Dr. Tushar Krishna discusses
the hardware-software co-design of NoCs as well as coming advances in fields
such as photonics.
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