Circuit Cellar Ink 163
February 2004

Table of Contents

4


Jennifer Huber

HTML Task Manager

Five Ways to Lose Your Wires

8


John Gorsky

New Product News

  • MDEV-HP3-xxx Wireless Development System from Linx Technologies

9


David Tweed

HTML Test Your EQ

10


Russell Lindgren

CoolRunner-II-Based Digital Telemetry Transmitter

With the proper guidance, it's fairly easy to build a wireless link for a sensor application that transmits one-way information like temperature and pressure. In this article, Russ shows you how to build your own wireless link with a CoolRunner-II CPLD.

Download: Lindgren163.zip

20


Ken Merk

Wireless Vehicle Tracking

Part 1: System Basics

Ken developed a GPS-based wireless tracking system in an effort to help an electrical contractor keep tabs on the whereabouts of his mobile power generators. In the first part of this series, Ken describes the hardware components and how to mount them on a PCB.

Download: Merk163.zip

28


Mathew Laibowitz
Joseph Paradiso

Wearable Wireless Transceivers

It's becoming easier to incorporate wireless RF links in electronics projects, especially when you know how to select the proper short-range RF device. Mat and Joe first bring you up to speed on the newest embedded RF devices. Then, they describe how such devices were used in a series of wireless wearable platforms developed at the MIT Media Lab.

Download: Laibowitz163.zip

Embedded PC

40


Fred Eady

Applied PCs

Picking Apart Microchip's dsPIC

You've heard a lot about dsPIC technology. Now it's time for the specifics. This month, Fred takes you on a dsPIC tour, covering both the hardware and software. Whether you're a DSP veteran or new to the game, this dsPIC primer is just what you need to get moving on your next project.

Download: Eady163.zip

50


Larry Martin

$1 Wireless Interface

Do you want a wireless interface for your next project? With a coil, a capacitor, and a transistor, you can make your next project emulate a radio frequency identification device (RFID), commonly called a "tag" or "RFID tag." In this article, Larry shows you how.

Download: Martin163.zip

56


Ed Nisley

Above the Ground Plane

Filters and Firmware

As Ed explains, filtering can be used to enhance desired signals or refuse unwanted ones. In his December 2003 column, he explained how his circuitry converted a 10-MHz sine wave into an 11.25-MHz microcontroller clock. This month, Ed shows you how another filter extracts the 60-Hz power line signal. And, he explains why a combination of hardware and firmware squanders most of the resolution implied by a GPS-locked reference clock.

Download: Nisley163.zip

60


Dan Beadle

Wireless Water Heater

Some people like to remotely start their cars when it's cold outside. Dan took this idea one step further by Internet-enabling his mountainside retreat's hydronics system. The Airborne-based system allows him to warm the house well in advance of his arrival.

Download: Beadle163.zip

68


Jeff Bachiochi

HTML From the Bench

The Growth of the Atmel AVR Family

The Atmel AVR family has been growing rapidly since its debut in the late 1990s. Today, you have several AVR products to choose from when preparing for a project. This month, Jeff delves deeper into the AVR story, and provides an example of how an AVR-based design allows him to control a thermostat.

Download: Bachiochi163.zip

76


Tom Cantrell

Silicon Update

'51 Flavors

"The chip that wouldn't die." That's how Tom characterizes the 8051, which first hit the scene in the late 1970s. The chip has persevered, and today, some of the hottest chips on the market, such as the Cygnal (now Signal Laboratories) C8051F120, owe much of their success to the 8051 architecture.

94

Advertiser's Index / March Preview

96


Steve Ciarcia

HTML Priority Interrupt

Moving Forward

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