Circuit Cellar Ink 138
January 2002

Table of Contents


Rob Walker

Task Manager

Survey Says...


Rick Prescott

New Product News


David Tweed

HTML Test Your EQ


Bruce Bowling
Al Grippo

Building a Fuel-Injection ECU

Trying to replace or upgrade an ECU with commercial offerings can get expensive. Instead, Bruce and Al take you through the process of building your own fuel-injection ECU. They start with plenty of information on electronic fuel injection systems and how everything works.



Richard Soja

An Integrated PWM Light Controller

Part 2: The Battery Charger

Richard is back to finish up his project. He's been working on an integrated PWM light controller for bicycling at night, which you can adapt for your own applications. Now that you know how to build the lamp controller, it's time to complete the project with the battery charger system.


Jan Axelson

No Power Supply Required

Powering USB Devices

USB has opened a whole new chapter in the development of peripherals. In order to get the most out of it you need to understand the requirements covered in USB specifications. Who better to explain the process than accomplished author and USB expert, Jan Axelson?


Brian Millier

HTML An RF-Controlled Irrigation System

With access to a steady water supply, Brian's garden should flourish in even the driest of times. Having caught wireless fever, he set out to use an AVR and some RF products to man the pump and close the valves. Now, watering only takes a press of the green thumb.



Duane Mattern

HTML Exploring QNX Neutrino

Yes, QNX has been around for a while. But, that doesn't mean it's outdated nor that it isn't a helpful solution to some of today's real-time problems. Duane takes us step by step through everything from downloading the eval copy to displaying bootable images in real time.



Jim Turley

Is RISC Good for Embedded?

When you're gathering materials to start your next project, there are tough choices. One major decision is picking either RISC or its predecessor, CISC. Although comparably ancient in the fast-moving tech field, CISC still makes the grade and, in fact, is often the better choice.


Brad Eckert

Extensibility for Small Embedded Systems

Using a dialect of Forth, Brad shows us how to combine run-time compilation and immediate execution of add-on firmware in order to make an embedded system extensible. New hardware introduces itself to the original firmware making the upgrade process much easier.

Embedded PC


Fred Eady

Applied PCs

"The" Embedded Project, Part 1: Specifications and Components

Everyone has a project that lingers on the to-do list for months, just waiting for the right parts to come along. Fred decided he had to hunt down the right parts on the 'Net. First, he had to determine what parts he needed and how they would work with what he already had.



Tom Napier

A Wide-Range Audio Generator

After some thought about one of his past articles, Tom decided that bigger and better things were just around the corner for the project. Following up, he used analog signal manipulation to get a sine wave from the 74HCT4046 chip he used in the earlier project.



Jeff Bachiochi

HTML From the Bench

What Good is IrD, Eh?, Part 1: Cordless Protocol

The IrDA has been hard at work creating a host of protocols. In the first part of this series, Jeff looks at the protocol that covers the requirements of the physical cordless hardware.



Tom Cantrell

Silicon Update

Disko Boogie

Recently, Tom found the first hard drive he owned and was immediately reminded of how far disk drives have come since the early days. Now, he wonders just how much better can hard disk drives get?


Advertiser's Index / February Preview


Steve Ciarcia

HTML, HTML Priority Interrupt

I'll Stay on the Ground, Thank You!

I'd like to think that the public and the airline industry would have come to its senses long before the events of last September but maybe that's what it took. Yes, air travel is down, flights have been cut, and airline stocks are in the tank. It's easy to correlate it all to security but I think the cause started long before September 11, 2001. Many of us wonder if long-distance travel is worth the hassle. Security delays are but one more item on the list of reasons against it...

Circuit Cellar Online

Daniel Mihalik

PDF HTML Scope It Out

Building a MPC555-Based Oscilloscope

With a detailed description of how to use the QADC and the SCI on the MPC555, Daniel shows us how to create our own simple oscilloscope. He even includes the source code needed for the design. In the end, we wind up with a useful debug tool. And, that's just the beginning. With a few software upgrades, the opportunities are limitless.

Circuit Cellar Online

Aubrey Kagan

PDF HTML Do You Excel in Electronics?

Part 1: Learning the Basics of Excel

Although you usually hear of Excel being used for business or home finances, in his series, Aubrey shows us that the engineers can benefit by using the program to make the design process easier. This month, he takes us through the basic techniques of Excel, including naming cells, look-up tables, costing a product, and more.

Download: examples.ZIP

Circuit Cellar Online

James Antonakos

PDF HTML The eZ80 Webserver

An 8-bit CPU Takes on the Internet

James likes doing what the majority of engineers enjoy most -- discovering new hardware and software. And this month, he got a real kick out of Zilog's new eZ80 Webserver microprocessor. Along with the many design ideas he came up with, he also got an idea for a contest. Check it out and then enter!

Circuit Cellar Online

George Martin

PDF HTML Lessons from the Trenches

Getting into a Routine, Setting Up an Integer Print Routine

As you know, the slightest bump in any routine can cause chaos. George finds himself needing a formatted printing routine, this month, and only perfection will do. The answer to his prayers? A little modification to Turbo C's printf and sprintf.


Circuit Cellar Online

Tom Cantrell

PDF HTML Silicon Update Online

USB -- It's not Just a Bus, It'a an Adventure

Hardhearted, cynical, pessimistic. Sounds like a description of the Grinch or Ebeneezer Scrooge, right? More like engineers when it comes to PCs. This month, Tom pours out his frustrations with PCs and the software/hardware upgrades that invariably follow, and sings his praise of one thing about PCs that's yet to let him down -- USB.

Circuit Cellar Online

David Tweed

HTML What's Your Engineering Quotient?

Test Your EQ presents some basic engineering problems for you to test your engineering quotient.

Circuit Cellar Online

Jenn Belmonte

Resource Links

Each month Circuit Cellar's Resource Links provide helpful links and information on a variety of featured topics.

Circuit Cellar Online

John Gorsky

New Product News

New Product submissions may be sent to John Gorsky, 4 Park St., Vernon, CT 06066.
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