Circuit Cellar Ink 27
June/July 1992

Table of Contents


Ken Davidson

Editor's INK

Computing in Real Time


Reader's INK

Letters to the Editor


Harv Weiner

New Product News


Mike Podanoffsky

Build a Real-Time Multitasking Executive

Having several independent, concurrent tasks running on a real-time system often simplifies program development. Find out what it takes to put such a system together.

Download: RTX.ZIP


Robert Scott

Resource Management in Cooperative Multitasking

In applications where cooperation between tasks is necessary to get the job done, sharing hardware resources effectively can make the difference between a useful system and a useless system.


Francis Lyn

Using Programmable Logic Controllers

We hear a lot about general-purpose microcontrollers used in embedded control situations, but what about the die-hard controllers that brave the hostile environment of the factory floor? Find out about PLCs.

Download: TILE.ZIP


Dwayne Phillips

LZW Data Compression

In this age of information, greater emphasis is being placed on fitting more on a disk and shortening data transfer times. Find out the ins and outs of one of the more popular data compression methods.

Download: LZW.ZIP


John Dybowski

The Elements of a Data Logger

Batteries, real-time clocks, power-control circuits, A/D converters -- they are all just as important as the microcontroller in a data logger. Find out what to look for when selecting data logger components.

Download: LOG5000.ZIP LOG8031.ZIP


Ed Nisley

PDF Firmware Furnace

An HCS II LCD Terminal

The Circuit Cellar HCS II interfaces well with real-world sensors and actuators, but what about the human interface? Ed shows us a simple LCD terminal that can be added anywhere in the system.



Jeff Bachiochi

From the Bench

Computers on the Brain (revisited)

Circuit simulation is becoming a more affordable design tool every day. Get inside Jeff's head as he takes a new look at a popular Ciarcia project.


Tom Cantrell

Silicon Update

Multimedia Madness -- Couch Potato Computing

RISC, CISC, PIC, fuzzy logic -- Tom has never been one to shy away from the latest buzzword. This time, he's tackling something we've all been hearing a great deal about: multimedia.


John Dybowski

Practical Algorithms

Use a Watchdog to Keep Your Controller in Line

A watchdog can be an invaluable aid in keeping a system completely reliable, but only when properly implemented. John gives some hints for what to do and what not to do.


Advertiser's Index


Ken Davidson

ConnecTime -- Excerpts from the Circuit Cellar BBS


Steve Ciarcia

Steve's Own INK

Making "Sense" Of the World

FTP Directory for INK 27
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