Circuit Cellar Ink 167
June 2004

Table of Contents


Jennifer Huber

HTML Task Manager

Tips and Solutions


John Gorsky

New Product News

  • AD7400 and AD7401 isolated ADC from Analog Devices, Inc.
  • ISPICR1 in-circuit programming adapter from OKW Electronics


David Tweed

HTML Test Your EQ


Alberto Ricci Bitti

HTML Wireless Monitoring System

Alberto's MC68HC908-based wireless monitoring system is adaptable for use in domestic and industrial settings. The central monitoring station, which consists of a computer-controlled receiver with a relay output and LCD, logs and displays data from up to 20 different sensors. Read on to learn how to build, program, and test your own system.

Download: Ricci


Pete Rizun
William Hue

Turbocharged Upgrade

Crank Trigger Modification Eliminates Engine Knocking

If you push a car with an aftermarket turbocharger too hard, its engine will knock. You don't need to be a trained mechanic to know that this puts stress on an engine. As a solution, Pete and William put a PIC16F73 and an MPX4250AP pressure sensor to work in a device that eliminates engine knocking without draining too much horsepower in the process.



Brad Thurow
Joel Jorgenson
Divyata Kakumanu
Brian Morlock
Mike Schmitz

Monopole Antenna Design

Having trouble selecting an antenna for your new wireless system? Check out how this North Dakota State University design team used a guitar string antenna in a wireless sensor project. It's a great alternative to the expensive whip and surface-mount antennas that you're used to.



Jennifer Huber

Renesas Design 2003 Contest Winners


Anders Rosvall

Simple Bluetooth Integration

Part 2: Interfaces and ECI Protocol

Last month Anders explained how the ROK104001 and cB-OEMSPA13i make Bluetooth integration a cinch. Now he covers the interfaces and ECI protocol. Bluetooth integration is in your future.



Gareth Scott

ZRT Real-Time Operating System

Gareth's small preemptive multitasking operating system runs on Zilog's Z8 microcontroller. The system -- which consists of lightweight threads, a round-robin scheduler, and a binary semaphore -- has the ability to voluntarily relinquish control back to the scheduler. Get ready to incorporate multitasking in your next project.



Scott Pape

MCU Evolution

New Microcontrollers Meet Increasing Demand

Survival of the fittest? You bet. Scott describes two areas in which MCUs are evolving to meet the demand for cutting-edge apps: reduced power consumption and clock system flexibility.

Above the Ground Plane


Ed Nisley

Robot Mechanics

Writing a program for a robot requires an understanding of both physics and standard programming techniques. This column contains all of the basic information -- essential formulas included -- every serious robot designer should know.


Applied PCs


Fred Eady

Adaptable Temperature Measurement System

Fred recently designed a PIC18F452-based temperature measurement system for a small holding tank. Toss in a pair of Promi-SD202 Bluetooth modules, and you have wireless control.


From the Bench


Jeff Bachiochi

Smart Sensor Design

Designing smart sensors can be tricky. Back in the mid-1990s, members of the transducer community believed that the IEEE 1451 standard would make things easier. Has it? Take note of Jeff's opinion before starting your next smart sensor design.


George Martin

Designing with the Nios

Part 1: Second-Order, Closed-Loop Servo Control

Is the Nios the next major development in embedded system design? George is sold on its applicability; so much so, he used it to design a second-order, closed-loop servo control.

Silicon Update


Tom Cantrell

Radio Riot

Wireless this and wireless that. With all the new products and standards floating in a sea of marketing hype, it's hard to know what will best fit your design needs. Fortunately, Tom's got the scoop on the most appropriate wireless solutions available to you, the designer.


Advertiser's Index / July Preview


Steve Ciarcia

HTML Priority Interrupt

To TiVo or Not to TiVo

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