February 1998 Issue Articles and Columns   Select Year and Month to View Other Issues

ARTICLES

SECURITY ELECTRONICS SYSTEMS AND CIRCUITS — PART 1 - Ray Marston
Electronic security system basic principles are explained in this opening episode to a new series.

INDOOR THERMOMETER - Richard Panosh
Build a digital indoor thermometer that can display temperature either on the traditional Fahrenheit scale or the Celsius scale.

FOREVER DOORBELL - Kenton Chun
Get burned up when your doorbell light burns out? Then this project will have a nice ring to it ...

BE AN FCC LICENSED SHORE STATION - Gordon West
Set up your own private coast station and be a part of the action on the airwaves.

IR REMOTE DECODER - Terry J. Weeder
Incorporate remote control and/or keypad entry into your customary circuit designs.

FIRST STEPS IN ARTIFICIAL INTELLIGENCE - Jeff Stefan
If you’re interested in AI but don’t know where to start, this is the place to be.

BUILD A PIC-BASED ELECTRONICS STOPWATCH WITH GIANT 2.5” LED DISPLAY - Scott Edwards
Take the Jameco JE725 electronic clock kit one step further by converting it into a stopwatch.

BUILD A SOUND-OPERATED AC SWITCH - Fred Blechman
Don’t stay in the dark! With a clap of your hands, the Graymark Model 147P can shed some light on your situation.

THE TOILIGHT — HIGH-TECH TOILET LIGHT - Kenton Chun
Check out this toilet nightlight that burns bright when you need it the most.

THE WEEKEND WORKBENCH - Andy A. Node
Looking for some fun, one-night projects? Let Andy show you ...

COLUMNS

AMATEUR ROBOTICS - Karl Lunt
More progress on the Fire-fighting robot..

OPEN CHANNEL - Joe Carr
Like electronics? Think you can write? Discover tips on submitting articles, plus information on the CET program and a mini quiz.

RESOURCE BIN - Don Lancaster
Insider secrets of surplus and auctions.

STAMP APPLICATIONS - John Barrowman, Jef Martin, Ken Gracey
Parallax’s technical support staff discusses synthesizing a real-time clock, floating point math simulation, and counting pulses on multiple I/O pins.

SOFTWARE WIZARDRY - Harry Helms
Tracking visitors to your web site.