Circuit Cellar Ink 43
February 1994

Table of Contents

2 Ken Davidson	Editor's INK Warp Speed, Mr. LaForge
6	Reader's INK Letters to the Editor
8 Harv Weiner	New Product News
14 John N. Hait	Programmable Lightware How to Develop Photonic Products for Fun and Profit You think those new processors such as the Pentium and Alpha are fast? Ever consider a light-based computer? It may not be long before you SEE one of these.
26 Shaun Greaney	In the Eye of the Beholder Displaying Messages with the LightStick II If you've ever seen multiple images of the current time as you sweep your eye past a digital clock, you've experienced the premise behind the LightStick II. Find out how to display your own ghostly images. Download: LITESTIK.ZIP
36 Do-While Jones	Interrupt-free Design Over the years, the purpose behind a design decision is often forgotten in a sea of, "But that's the way we've always done it." If you automatically use interrupts in your embedded designs, think again.
40 Hank Wallace	An Assembly Language Programming Aid Even though it may seem everyone has switched to high-level languages, experienced programmers know the value of hand-crafted assembly code. Here's one technique that combines the best of both worlds.
48 Ed Nisley	Firmware Furnace Hardware for the '386SX Project's Bitmapped LCD Panel On with the show. Ed proceeds with the addition of a Graphic LCD Interface to his Firmware Development Board. It's not all pixels and dots from here; instead it is timing and control that must be dealt with. Download: FF43.ZIP
58 Jeff Bachiochi	From the Bench Warming Up the Digital Thermostat Jeff adds some smarts to last month's project using Dallas's DS1620 thermostatic device. With a little help from a 16C56 PIC processor, your house will be cool while you sleep and warm while you're up and about. Download: FTB43.ZIP
64 Tom Cantrell	Silicon Update Op-amp Terminators Delving into the occult world of analog design, our digital hero takes some jabs at this necessary evil of real-world interfacing and checks out some new chips destined to take over where the op-amp left off.
70 John Dybowski	Embedded Techniques Data Logging and Collection Devices So what comes between a high-tech Cray and a low-tech transistor? Follow along as John starts a series describing a general-purpose embedded control system with lots of potential.
77 Russ Reiss	Patent Talk
81	Advertiser's Index
83 Ken Davidson	ConnecTime -- Excerpts from the Circuit Cellar BBS
96 Steve Ciarcia	Steve's Own INK And the Survey Says ...

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