Circuit Cellar Ink 239
June 2010

Table of Contents

4 CJ Abate	HTML Task Manager Embedded Is Everywhere
8 John Gorsky	HTML New Product News i2cStick pocket-size, bus-powered, USB-to-I2C adapter from Micro Computer Control Corp. Terminus GSM865CF, CDMA864CF, and UMTS864CF GSM/GPRS, CDMA, and UMTS modem modules from Janus Remote Communications uPG2251T6M GaAs RF power amplifier from California Eastern Laboratories LXRW series of UHF RFID reader-writer modules from Murata Electronics North America enhanced LT2510 proprietary 2.4-GHz wireless module family from Laird Technologies, Inc. Twinax, Micro Coax, and Direct-to-Lead Coax Cable Assemblies from Samtec, Inc.
15 David Tweed	HTML Test Your EQ - Answers for Issue 238
16 Chris Cantrell	Custom Interpreter Development An Innovative LED Movie Project Ready to make movies? Here you learn how to create two specific CPUs, each with its own unique language: one for movie frames and one for music. The design reads movie frames from an SD card and displays them on a 48 x 32 LED display while generating music with six independent voices. Download: CCantrell-239.zip
Intelligent Energy Solutions 24 Stefan Siegel	Home Automation for an Energy-Efficient House Part 2: Embedded CANOpen Node Hardware & Software The first part of this series introduced a home automation system an for energy-efficient house. This article covers the embedded hardware and software for the nodes. You can use similar parts and design techniques to automate the building of your choice. Download: Siegel-239.zip
36 Chris Paiano	OAE Probe Amp and Intercom Part 2: Otoacoustic Experiments You are familiar with the process of designing and building an OAE probe amp and intercom system. Now you can perform otoacoustic experiments. Doing so will give you a good grounding in the study of otoacoustics and prepare you for future audio projects. Download: Paiano-239.zip
Above the Ground Plane 44 Ed Nisley	Totally Featureless Clock Part 3: Signal Processing You are well on your way to building a "totally featureless clock." You understand the hardware and how to build a WWVB simulator. This article details how firmware converts a received pulse stream into time codes, validates the codes, and ensures that the clock displays the correct time. Download: Nisley-239.zip
The Darker Side 54 Robert Lacoste	DC/DC Converter Basics Inductors can be difficult to understand, let alone put to good use. This article bridges the gap between inductor theory and the practice of using inductors to build efficient DC/DC converters. Download: Lacoste-239.zip
From the Bench 62 Jeff Bachiochi	Application Communication with USB Part 1: The Enumeration Process Explained Consumers understand how to use USB technology. Developers must understand how it works. This article series is an excellent starting point. Here you learn how a USB device goes through a number of states as it progresses through the enumeration process.
Silicon Update 69 Tom Cantrell	Pitch the Switch? The basic design of the mechanical switch -- two conductors and a contact -- is hundreds of years old. How many switches get sold every year? Wow, that's a big number. Now Atmel says it's time to rethink the obvious. Is it time to pitch the switch?
74	Crossword Puzzle
78	Crossword Puzzle - Answers for Issue 238
79	Advertiser's Index / July Preview
80 Steve Ciarcia	HTML Priority Interrupt Is It Cheating or Is It Collaboration?

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