Circuit Cellar Ink 175
February 2005

Table of Contents


Jennifer Huber

HTML Task Manager

Go Wireless


John Gorsky

New Product News

  • 9XTend-PKG-R 1-Watt RF modem from MaxStream, Inc.
  • R301 Modbus Digital Remote Terminal Unit from R2 Controls
  • RCT-xxx-AS tiny ASK/OOK transmitter module from Radiotronix, Inc.


Reader I/O

Letters to the Editor


David Tweed

HTML Test Your EQ


Pete Cross

PDF HTML Zeroing in on ZigBee

Part 1: Introduction to the Standard

Will the ZigBee standard successfully emerge from the world of technical committees and marketing hype? If so, will it be accessible enough for you to use in simple low-cost projects? In this two-part series of articles, Pete investigates these questions and more.


Dick Cappels

Minimum Mass Wireless Coupler

Dick's minimum mass wireless coupler allows you to connect the devices on your workbench to a PC. No electrical connections are required. You can use an AT90S2313 or an ATmega8 to control the system.



Brian Millier

Noncontact Infrared Thermometry

Noncontact infrared thermometry has enabled doctors to get rid of mercury thermometers. This technology also allows distributors to monitor the temperature of food products without contaminating them with sensors. Read on to learn how to use it in a project of your own.

2004 AVR Design Contest


Bryan Sobczyk
Vince Formica
William Sebastian
Kevin Wertz

HTML Flexible Wireless Telemetry System

This group of former University of Akron students built a wireless telemetry system for a racing team that needed a way to obtain real-time data about its car's performance. The result is an affordable system that's perfect for industrial control and data acquisition designs.


Above the Ground Plane


Ed Nisley

Capacitors at RF

Sometimes you have to watch out for the little guys -- you know, the simple capacitors you overlook as you focus all your attention on microcontrollers and sensors. Neglecting the least glamorous parts of a design can come back to haunt you, especially if you're working with high-frequency circuits. It's time for a closer look at capacitors.

Applied PCs


Fred Eady

ALFAT-Based Embedded System Storage

Need some additional data storage space for one of your designs? ALFAT's for you. It's a single-IC, drop-in FAT solution for embedded system storage.


From the Bench


Jeff Bachiochi

HTML A Look at the M16C Lineup

Renesas M16C Design Contest 2005

Members of the Renesas M16C family are packed with features. Read on for a closer look at the R8C/Tiny, M16C/Tiny, M16C/60, and M16C/80.



Elecia White

Open Source Code Guide

Writing code from scratch isn't always practical, especially when time isn't on your side. So before you start working on your next project, take a look at Elecia's approach to code collection. Working with free code can cut in half the time you'd otherwise spend on the software end of a project.


Henry Jacobs


A Portable Wireless X10 Thermostat

Henry's XTstat wireless thermostat allows you to adjust a room's temperature with a remote control. Inexpensive and easy to assemble, this PIC12F629-based device is a great starting point for wireless temperature control projects.


Silicon Update


Tom Cantrell

More Bits, Less Bucks

Tom's saying it again: 32-bit ARM-based MCUs are poised to become the 8051s of tomorrow. This means they are quickly becoming a practical option for embedded designs. But the story isn't just about performance; it's also about price. And the price seems right.


Advertiser's Index / March Preview


Steve Ciarcia

HTML Priority Interrupt

Between a Nightmare and a Rip-Off

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