Circuit Cellar Ink 87
October 1997

Table of Contents


Ken Davidson

Task Manager

And the Survey Says ...


Reader I/O

Letters to the Editor


Harv Weiner

New Product News


Damon Chu

Analog Data Acquisition

As computer components evolve, chips get smaller, faster, and more integrated. Take the PIC12C672. In eight pins, Microchip brings us 2048 words of PROM, 128 bytes of user RAM, and advanced features like on-chip ADC and four analog channels.


Steven Kraft

DTMF Message Decoders

Telephone Aids for the Hearing Impaired

Talking on the telephone is an ordinary part of life -- unless you can't hear. Steven shows how to build a DTMF message decoder to improve voice communication over the telephone for the hearing impaired.



Craig Pataky

Interprocess Communication

Moving DOS Programs into Windows

Sometimes you want your program running in DOS and you want a GUI front end. Impossible? Not according to Craig. Although DOS and Windows are a universe apart, all you need is a wormhole to bring them together. Here's how to create one.

Download: WMHOLE.ZIP


Bill Jackson
Reynaldo Archide

Compressed-Code TinyBASIC

In the embedded world, it's a precarious balance between cost and performance. TO maximize memory and reduce costs, Bill and Reynaldo suggest MIPS16, an extension of LSI Logic's TinyRISC family.

Embedded PC


Harv Weiner

Nouveau PC

Embedded PC


Jim Blazer
Janos Levendovszky
Robert Haris

PDF Intelligent Data Acquisition

Strapped by a narrow bus and an overly taxed CPU, embedded PCs have traditionally been unable to compete with high-end data acquisition and processing. But, with a DSP coprocessor, the PC is breaking into this niche.

Embedded PC


Steve Lisberger

Precision Timing and I/O

When precise timing of events is required, software is not the way to go since each call to the clock also takes up time. Steve therefore moves this operation into the hardware and gains better than 10-uS resolution.

Download: TIMING.ZIP

Embedded PC


Dennis Liles
Rick Lehrbaum

PDF PC/104 Quarter

PC/104 Steps Out of the Box

There are times when the teenie-weenie PC/104 form factor just doesn't cut it. Why? Because it takes 1-2 years for the latest desktop CPUs to shrink enough to fit, and sometimes you need mroe high-end functions on a board. Enter EBX.

Embedded PC


Fred Eady

Applied PCs

Managing a NASA Plant-Growth Chamber, Part 2: Coordinating Sensors and Analyzing Data

Fred offer a traditional data-collection technique? No way. Instead, he's taking the hardware he selected last month, starting at the sensor end, tracing the datastream to the SBC301 flash file, and serving it up to a Web browser.


Ingo Cyliax


MC68030 Workstation, Part 2: The Boot PROM Monitor & Device Drivers

Stranded by Motorola's decision to discontinue an affordable MC68000 eval board, Ingo built a 68k platform to teach programming in assembly. After covering the hardware last month, he looks at the boot-PROM monitor and how to build device drivers.


Jeff Bachiochi

From the Bench

Prototypes of the Rich and Famous -- Not!

Once, the undersides of prototype boards were a spaghetti-factory wonder. Now, with the advent of mail-order PCBs, engineers can unwire their prototypes. Heck, they can just E-mail them in via the Internet.


Tom Cantrell

Silicon Update

A(r)Ray of Analog Hope

Although Tom trembles before the analog god, he regrets the losses that digital brings. Seeking analog fidelity and digital ease, he finds his Mecca in Motorola's programmable analog array.


Advertiser's Index


Steve Ciarcia

HTML Priority Interrupt

The People's Contest

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