Circuit Cellar Ink 54
January 1995

Table of Contents


Ken Davidson

Editor's INK

It's Only Skin Deep


Reader's INK

Letters to the Editor


Harv Weiner

New Product News


David Rees-Thomas

Simulating Microprocessor Instructions in C

Although burning EPROMs no longer costs a bundle, it still takes time and isn't very efficient for debugging. To cut labor costs and better learn the micro he's using, David creates his own simulator.

Download: SIMC.ZIP


Hank Wallace

No Emulator? Try a One-wire Debugger

A bug the night before a tradeshow drives Hank to invent his own debugger which scans for the smallest bit in a data burst and outputs the bitstream to the printer. He admits it's not an emulator, but in a pinch...



Steven Kubis

Using Spreadsheets to Simulate Digital Filters

Who says spreadsheets are just a financial tool? Steven proves otherwise. Cells easily accomodate input data and subsequent calculations of the output signal. Voila, your spreadsheet is a digital filter.


Art Sobel

A RISK Designer's New Right ARM

Writing Code for the ARM Processor

After an introduction to the ARM and its hardware in the October and December issues, Art wraps up his three-part series with the fundamentals of ARM software. Listen in for some good "how tos."



Ed Nisley

PDF Firmware Furnace

Journey to the Protected Land: Serious CISC Meets the Taskettes

This month, Ed introduces us to fundamental multitasking using the '386's features. And, once he has that going right, he takes out his stop watch to measure just how long the task switch takes.

Download: FF54.ZIP


Jeff Bachiochi

From the Bench

Getting By With Next to Nothing: Micro-power Wake-up Control

You'd think with this lean, mean, wake-up machine that there'd be no eggs and bacon. But, with the right power management, a lot can be done on very little.

Download: FTB54.ZIP

Home Automation & Building Control


David Gaddis

PDF Multimedia Home Networks

Forget rewiring. Use your existing coax cable system to create a first-class, whole-house entertainment system that includes a multimedia computer and is on a budget you can afford.

Home Automation & Building Control


Steve Ciarcia

PDF HCS Hard-wire Control: Back to Basics

The HCS II accomplishes lots of goals -- ease of use, energy savings, security, and automation. But, you've got to know how to make connections to real-world devices for it to be effective. For this, Steve takes us back to the basics, reminding us of how to do fundamental hard-wired connections.

Home Automation & Building Control


Jeff Fisher

PDF A Different Set of House Keys

Making the Most of a Small Keyboard

Designing a hand-held IR remote for doing general-purpose home automation is no small feat. Jeff discusses the design issues involved, presents some options, and settles on a set of features for the "ultimate" remote.

Home Automation & Building Control


Robert M. Luzensky
Jack Ivey

PDF, PDF Computer, Get That Phone

A PC-based Voice-Telephone Interface

Robert and Jack dream of viewing a movie free of telemarketing interruptions. With the new DS2132A Digital Answering Machine Processor, the realization of such a dream is much closer.

Download: PCVC_V10.ZIP


Tom Cantrell

Silicon Update

UFO Alert!

The old 8051, despite its popularity, is losing ground to current competition. Philips is fighting back. Their new "8051s" wear the same 8-bit jacket, but underneath lies a 16-bit ALU, register set, and bus interface.


John Dybowski

Embedded Techniques

Micros Behind Bars

To gain a better understanding of how bar code works, John picks one apart. He then looks at the hardware and firmware required to get a real microcontroller decoding real bar code.

Download: BAR.ZIP


Advertiser's Index


Ken Davidson

ConnecTime -- Excerpts from the Circuit Cellar BBS


Steve Ciarcia

Steve's Own INK

Hat Dance

FTP Directory for INK 54
Follow this link to order a copy of INK 54

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