Circuit Cellar Ink 107
June 1999

Table of Contents


Elizabeth Laurencot

Task Manager

Not Just One of the Guys


Reader I/O

Circuit Cellar Homepage


Harv Weiner

New Product News

  • SBC-1 8051 computer/controller from Industrologic, Inc.
  • ICT Probe from Interconnect Devices, Inc.
  • MCR-T/UI Universal Signal Conditioner from Phoenix Contact, Inc.
  • JDS-148 Remote Temperature Module from J-Works, Inc.
  • ATDEV-8535-1 Development/Prototype board for Atmel from Baritek, Inc.


Stephen Holland

HTML, HTML, HTML Low-Cost Software Bell-202 Modem

Imagine this: rapid and reliable data processing via a low-cost software modem. With the 50-MIPS Scenix SX MCU, Stephen designed just such a modem, and it offers the ease of flash memory and in-system debugging.

Download: Holland.ZIP

Note: Several errors are corrected in INK 110 Reader I/O.


Jan Axelson

PDF, PDF HTML Designing RS-485 Circuits

Jan knows that RS-485 is perfect for transferring small blocks of information over long distances, and she finds the RS-485 standard extremely flexible. Here, she shows us several circuits for RS-485 networks.


Paul Breed

HTML A Web-Based Chart Recorder

From needing a forklift to fitting in your pocket, chart recorders have undergone some big changes. Paul's recorder has something even newer -- it accesses up-to-the-minute information using an embedded web server.


Embedded PC


Harv Weiner

Nouveau PC

  • Instant Instrument embedded PC platform from Instant Instrument
  • PDA500 data acquisition board from Signatec, Inc.
  • PC/Piranha Windows CE vehicle computer from Kinetic Computer Corp.
  • VIPer826 Cyrix-based ISA/PC/104 SBC from Teknor Industrial Computers, Inc.
  • TCP/Com serial to TCP/IP converter software from TAL Technologies, Inc.

Embedded PC


Aaron Feen

Embedded Ethernet Fundamentals

Ethernet connectivity is desirable in many real-world applications. To get your embedded device connected, listen up as Aaron overviews the hardware and software considerations you'll need to think about.

Embedded PC


Ingo Cyliax

Real-Time PC

Astronomical Issues, Part 3: Filters and Undersampling

DSP applications often incorporate FIR filters. This month, Ingo discusses digital filters and FIR techniques, as well as implementing these filters in FPGAs and undersampling -- a process used in digital radio design.

Embedded PC


Fred Eady

Applied PCs

Embedded Internet, Part 2: TCP/IP and a 16-Bit Compiler

Fred continues his journey into embedded 'Net technology by implementing the Netsock/100, an embedded PC with a built-in TCP/IP stack. Regardless of your coding skills, WinSock programming can be yours!


David Brooks

Embedded OSs for Internet Appliances

When you're looking at embedded OSs for your Internet-capable product, you've got a lot of pros and cons to think about. David goes through all the points here so when the time comes, you'll be ready to figure it out on your own!

Note: Additional choices mentioned by James LaBoda in INK 110 Reader I/O.


John Luo

Compact Optical Image Scanner

Mobile communications systems are big among people who take the office on the road. These systems have to be lightweight and low power. That rules out scanners, right? Wrong. The details of John's compact scanner are right here.

Download: Luo.ZIP

Note: Additional notes on parts availability in INK 111 Reader I/O.


Jim Lyle

PDF MicroSeries

USB Primer, Part 2: Classes and Drivers

Now that we have some of the USB basics from Part 1, we're raring to go with USB! Jim wonders if an OS can provide all the drivers for the many devices there are today. With USB classes, he explains, it's entirely possible.


Jeff Bachiochi

From the Bench

Look Ma, No Hands -- The Qprox Touchless Sensor

Jeff explores the new charge-coupled touch sensor -- the QT110 -- from Quantum Research Group. As you'll see, the analog and digital techniques it uses improve the long-term reliability of capacitive sensors.


Tom Cantrell

HTML Silicon Update

XLR8R -- Working with Accelerometers

Welcome to the wonderful world of micromachines! In fact, after taking a close look at a new two-axis accelerometer, Tom thinks these devices may even dominate the next price/performance curve.


HTML Test your EQ


Advertiser's Index / July Preview


Steve Ciarcia

HTML Priority Interrupt

Servings Per Issue

Note: Several letters in response appear in INK 109 Reader I/O.

Circuit Cellar Online

Tom Cantrell

HTML Silicon Update Online

The Modem Squad

At this point, the Internet is a very PC-centric place. But as it continues to weave its way into our daily lives, expect to see all manner of web gadgets emerge. Factory automation, remote data logging, and security systems are just a few of the most compelling embedded web apps.

Circuit Cellar Online

Ingo Cyliax

PDF, PDF HTML, HTML Portable Power: A Robotic Case History

To implement a real-time system, you have to figure out which RTOS to pick. Using a robot control application as an example, Ingo establishes what fundamental criteria you need to look at first.
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