Circuit Cellar Ink 106
May 1999

Table of Contents


Elizabeth Laurencot

Task Manager

Sensing the Obvious

Note: Additional comments by Gene Heskett in INK 107 Reader I/O.


Reader I/O

Circuit Cellar Online


Harv Weiner

New Product News

  • RH-02 Humidity/Temperature Sensor from Saelig Co.
  • T100MD-1616 programmable controller from Triangle Research Intl.
  • PK2500 C-programmable controller from Z-World, Inc.
  • DS1721 digital thermometer/thermostat from Dallas Semiconductor
  • Qik Start 16 PIC development module from Diversified Engineering and Manufacturing, Inc.


Mark Bauman

HTML Graphing Weather Monitor

Watch out, weather forecasters! Mark is checking up on you, and now all his relatives are, too. For Christmas, they received PIC-based graphing weather monitors that analyze current data for accurate local weather prediction.

Download: Bauman.ZIP


George Novacek

PDF HTML Accurate Linear Measurement Using LVDTs

Need reliability in a hostile environment? LVDTs may be the answer. These transducers are widely used for converting mechanical displacement into electrical signals. George helps us understand how they work and how we can use them.

Note: Correction regarding commercial suppliers in INK 119 Reader I/O.


Jack O'Neill

Sensing Water with Multiple Electrodes

When it comes to sensing water via its conductivity, electronic sensors don't enjoy the same widespread implementation as mechanical devices. The reason? Contamination. But Jack doesn't think the electronic sensor is in over its head.

Embedded PC


Harv Weiner

Nouveau PC

  • IBS PC ISA SC/I-T interbus controller board from Phoenix Contact, Inc.
  • 2111 Industrial SBC from Toronto MicroElectronics, Inc.
  • MiniModule/SES multifunction PC/104 module from Ampro Computers, Inc.
  • IR104 PC/104 I/O module from Tri-M Systems, Inc.

Embedded PC


Richard Ames

PDF HTML PalmPilot Application

Using Open Source Tools for Development

Did you know the PalmPilot is a programmable device? Probably not. Richard shows us how the same feature that lets us link to a desktop PC and download our daily schedule can be used to download new application programs.


Embedded PC


Ingo Cyliax

Real-Time PC

Astronomical Issues, Part 2: Radio Astronomy

As Ingo looks to the sky this month, he bigins measuring radio emissions from Jupiter using an all-digital wide-band receiver. After describing its construction, he details the tests it endured and shows us the resulting spectra.

Embedded PC


Fred Eady

Applied PCs

Embedded Internet, Part 1: On the Network

To get your embedded device on the Internet, you have to be able to write TCP/IP-enabled code. This month, Fred lays down the networking knowledge you'll need to install the kernel, build the system, and pass the data.


Mike Zerkus
John Lusher
Jonathan Ward

PDF MicroSeries

USB Primer, Part 1: Practical Design Guide

Before getting into the nitty-gritty of working on Universal Serial Bus projects, you need to know the basics. But Mike, John, and Jon offer more than an intro to USB. Their demo gets you ready to work on your own.


Jeff Bachiochi

PDF HTML, HTML, HTML From the Bench

Dallas 1-Wire Devices, Part 2: All on One

If you're looking for a needle in a haystack, maybe you could use a Dallas 1-wire device. Well, maybe not, but Jeff shows how its unique addressing systems enable multiple devices to run off one I/O pin.



Tom Cantrell

PDF HTML Silicon Update

Betting on Webware

Tom's rooting for the future of embedded Internet apps, but he knows it won't be easy. There are some big obstacles to clear before reaching the goal. At least Lawrence Taylor isn't blocking the path!


HTML Test your EQ


Advertiser's Index / June Preview


Steve Ciarcia

HTML Priority Interrupt

What's in a Name?

Circuit Cellar Online

Tom Cantrell

HTML Silicon Update Online

Flexible Flash '51

All the major 8-bit MCU suppliers like Motorola, Microchip, and Philips are hopping on the flash bandwagon. At the same time, the transition to flash provides a window of opportunity for smaller companies to move into a market otherwise dominated by major players with long track records.
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