In this issue

06 : PRODUCT NEWS

09 : CLIENT PROFILE
Matrix TSL

FEATURES
10 : Wi-Fi Plotter Controller
By Miguel Sanchez
Build your own SoC-based Wi-Fi plotter controller

17 : Design Methodologies of Ground Penetrating Radar for Surveillance Applications
By Nishant Mittal
An introduction to GPR technology and a look at design methodologies for developing high-performance surveillance systems

22 : Using iOS Devices for Data Acquisition and Control (Part 2)
Communication Essentials
By Brian Millier
The communications protocol for the IAQ-CO module, two Wi-Fi communication modes, and more

28 : Measuring Harmonic Distortion
By Jeff Smith
Handy techniques for measuring harmonic distortion in audio signals

36 : The JEADI ARM Project (Part 2)
Hardware and Code Details
By Abdul Rafay, Michael Smith, and Jason Long
Use the existing on-board LEDs and buttons to drive a virtual car

CC COMMUNITY
44 : QUESTIONS & ANSWERS
Adaptive Robotics & Beyond
An Interview with Henk Kiela
By Wisse Hettinga
A look at an adaptive robotics lab and a professor’s thoughts on how the technology will change the world

47 : EDITORS' PICKS

COLUMNS
53 : EMBEDDED IN THIN SLICES
Build an Embedded Systems Consulting
Company (Part 4)
Documentation, Commitments, and Insight
By Bob Japenga
Additional handy tips for starting an embedded systems consulting firm

56 : THE CONSUMMATE ENGINEER
Automatic Control (Part 1)
Basic Control Principles
By George Novacek
The basics of automatic control, including a simple closed-loop control system

60 : ABOVE THE GROUND PLANE
Reception vs. SDR Hardware
By Ed Nisley
SDR hardware combined with Raspberry Pi 3 software to explore short-term variations in groundwave propagation

68 : FROM THE BENCH
MIDI Beat Box (Part 2)
The Beat Goes On
By Jeff Bachiochi
How to integrate a Trellis keypad to trigger the MIDI player

TECH THE FUTURE
80 : The Future of Network-on-Chip (NoC) Architectures
By Dr. Tushar Krishna
What’s coming in terms of the hardware-software co-design of NoCs

Circuit Cellar Magazine Description:

Circuit Cellar magazine features engineering tutorials, detailed microcontroller-based projects, and embedded systems industry news for professional electrical engineers, EE/ECE academics, and highly skilled electronics enthusiasts. Since 1988, Circuit Cellar has featured projects and tutorials from the world's top engineers on subjects such as embedded development (e.g., prototyping and programming), signal processing (e.g., DSP chips and signal conditioning), programmable logic (e.g., FPGA projects), sensor systems (e.g., smart sensors and MEMS), 'Net-connected devices (e.g., IoT projects and protocol stacks), robotics (e.g., robotic systems and proximity sensing), and much more. Circuit Cellar is the ultimate resource for all of your electrical engineering-related needs.