Circuit Cellar Ink 26
April/May 1992

Table of Contents


Ken Davidson

Editor's INK

Divide and Conquer


Reader's INK

Letters to the Editor


Harv Weiner

New Product News


Jim Butler

Embedded Controller Networking Alternatives

Distributed control systems rely on network communications to exchange data and keep processes coordinated. There are numerous networking options available; the best depends on your application.


Steve Ciarcia

PDF Infrared Tracking and Remote Control

Meet the New HCS II IR-Link

Images of Big Brother accompany the idea of your house following your every move. Put Steve's people tracking system to good use as part of the new Circuit Cellar Home Control System.

Download: IRLINK.ZIP


Frank Cox

The Frugal Networker

A Crosspoint Switchboard for RS-232

How many times have you wanted to be able to easily switch two or three computers between, say, a printer, two modems, and a microcontroller? Find out how to do it easily using a telephone chip.

Download: FRUGAL.TXT


Ken Davidson

PDF Programming the Home Control System II

In the last issue of Circuit Cellar INK, members of the engineering staff introduced the Circuit Cellar HCS II. Find out now how to program the system to run your home.


Peter Hiscocks

State Machines in Software

A Design Technique for Single-Chip Microprocessors

State machines are commonly built in hardware using discrete logic. Explore the use of similar techniques for embedded software.


Edward Oscarson

Programming the Motorola MC68HC705C8

Most low-cost, stand-alone EPROM programmers can't handle microcontrollers with on-chip EPROMs. What's a developer to do? Use the chip to program itself; Edward show us how.



Ed Nisley

PDF Firmware Furnace

Infrared Home Control Gateway

You can already control you TV, VCR, and CD player from the comfort of your chair using a hand-held infrared remote. Why not control your home as well? Ed shows us the firmware involved in doing just that.


Jeff Bachiochi

From the Bench

Does It Come With a Memory ... Standard? -- Part 2 -- The Nitty-Gritty

In the last issue, Jeff introduced us to the PCMCIA memory card standard. This time, he shows us how to build an interface that should stand the test of time (assuming the standard does, too).



Tom Cantrell

Silicon Update

Twenty Years of Micros -- Now What?

The computer industry has come a long way in the last twenty years. One of the more esoteric technologies to be developed is fuzzy logic. Tom takes another look at this somewhat ticklish subject.


John Dybowski

Practical Algorithms

Writing Code to Support Nonvolatile Memory

Designing a system to survive an unexpected power loss may seem as easy as adding a battery backup to the RAM. However, making a truly bullet-proof system often requires more safeguards.


Advertiser's Index


Ken Davidson

ConnecTime -- Excerpts from the Circuit Cellar BBS


Steve Ciarcia

Steve's Own INK

A Night in the Life

FTP Directory for INK 26
Follow this link to order a copy of INK 26

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