Circuit Cellar Ink 256
November 2011

Table of Contents

4 CJ Abate	HTML Task Manager Tech Evolution
8 CJ Abate	HTML New Product News AS1328 high-efficiency 1.5-MHz synchronous DC-DC step-down converter from austriamicrosystems AR1100 USB analog resistive touch controller from Microchip Technology, Inc. QTouch family of capacitive-touch controllers from Atmel Corp. Wave Generator Xpress entry-level digital-pattern generator from Byte Paradigm FAB1200 headphone amplifier and FAB2200 audio subsystem from Fairchild Semiconductor DT9812A, DT9813A, and DT9814A low-cost, USB-powered data acquisition modules from Data Translation, Inc. M9036A modular PXIe embedded controller from Agilent Technologies, Inc.
17 David Tweed	HTML Test Your EQ
18 David Ludington	High-Accuracy Voltage Reference Using PWM Part 2: Hardware Design The first part of this article series covered the basics of pulse-width modulation (PWM). This article details a hardware design to evaluate practical PWM circuits. Also covered is the test setup to evaluate the hardware along with performance test results showing the achieved voltage accuracy.
24 Garret Phillips Matthew Kinne Nick Annetta	Auditory Navigator You can build an auditory navigation system that mimics a natural biological function to guide a human. This innovative design uses a GPS, a digital compass, and a microcontroller to generate sound based on the direction a user must turn in order to face a determined direction. Download: Phillips-256.zip
30 Guido Ottaviani	Sound Tone Detection with a PSoC Part 1: Analog Signal Management The first part of this two-part series details the hardware part of an audio sensor. You learn how to mount the component to a printed circuit board (PCB) and configure the internal hardware modules to manage an analog signal. Download: Ottaviani-256.zip
42 Clemens Valens	Super Arduino Getting Started with the chipKIT Max32 If you're looking for more computing power on an Arduino-compatible microcontroller board, Digilent's chipKIT Max32 may be just what you need. Digilent integrated a compiler, linker, and programmer for the Microchip Technology PIC32 processor used on the chipKIT boards into the Arduino IDE. Read on to find out more.
The Consummate Engineer 46 George Novacek	Shielding and Transfer Impedance Electromagnetic interference (EMI) and electromagnetic compatibility (EMC) issues should be at the top of your list of concerns when designing both prototypes and finished systems. A clear understanding of shielding and transfer impedance, along with some careful planning, will help lead to a successful design.
Questions & Answers 50 Nan Price	Embedded Design Theory & Practice An Interview with Shlomo Engelberg Shlomo Engelberg has been a member of the faculty of Jerusalem College of Technology's department of electronics since 1997. His research interests include the theory of ordinary and partial differential equations, control theory, signal processing, instrumentation, and measurement. Shlomo has written five articles for Circuit Cellar and is the editor-in-chief of the IEEE Instrumentation and Measurement Magazine. In September 2011, I spoke with Shlomo about his background in mathematics, engineering, and teaching. We also discussed a few of his passions -- most notably, math, teaching and explaining things, programming microcontrollers, and Analog Devices's microcontrollers and digital signal processors.
Lessons from the Trenches 54 George Martin	Design Development Part 4: Processors, Power, and Interfacing The first three parts of this series covered the processes for designing and viewing schematics and using unified modeling language (UML) to design a new product. Now it's time for a detailed look at processors, power, and interfacing to the transducers.
Embedded Unveiled 60 Richard Wotiz	Ionization Detectors It's time for a look inside a curious type of sensor that's used to bridge the gap between electricity and particle physics. This article covers a family of devices that measures ionizing radiation.
From the Bench 66 Jeff Bachiochi	Fly-By-Wire Wheelchair Part 1: Beyond Normal Joystick Control Joystick-controlled motorized wheelchairs are useful to those with mobility issues. But what if a user doesn't have the dexterity required to control a joystick? You can add the circuitry in this design to a commonly used non-bus-type motorized wheelchair to override joystick control.
74	Crossword Puzzle
77	Crossword Puzzle - Answers for Issue 255
79	Advertiser's Index / December Preview
80 Steve Ciarcia	HTML Priority Interrupt To 4G or Not to 4G?

FTP Directory for INK 256
<<< Ink 255	Ink 257 >>>
Main Index	Author Index