March 1999 Issue Articles and Columns   Select Year and Month to View Other Issues

ARTICLES

SOME PRACTICAL LIGHT METERS — PART 1 - Evert Fruitman
For years, photographers have used light meters to help determine the correct exposure for a picture. Take a look at several ways to measure the amount of light your camera sees, then learn some ways to customize a light meter that best meet your particular needs.

THE “OPTO” IN OPTOELECTRONICS — PART 1 - Ray Marston
Learn the basic nature and behavior of light and mirrors in this opening episode of an optoelectronics-related four-part series.

BUILD AN INEXPENSIVE WHOLE-HOUSE TEMPERATURE/HUMIDITY MONITORING SYSTEM — PART 2 - Mike Keryan
With the THX10 remote monitoring system described in this article, you will be able to transmit data from up to eight monitoring stations on your house’s power line, and receive the information on your PC, without any calibration or wiring between rooms.

E-MAILING FROM 3 MHz-30 MHz - Gordon West
There is a wide variety of ways to send short packets of E-Mail over the airwaves. Find out where and how.

DATA LOGGING WITH A DIGITAL MULTIMETER AND YOUR PC - Fred Blechman
If you have the need to monitor slowly changing electrical measurements for periods of minutes to days, then you’ll want to know about a “new breed” of DMM.

COLUMNS

AMATEUR ROBOTICS NOTEBOOK - Robert Nansel
Finishing the Breadbot brain transplant, taking the software much farther, plus some new “arrivals.”

OPEN CHANNEL - Joe Carr
Radio telemetry on a budget.

RESOURCE BIN - Don Lancaster
Supraluminal dowsing for Brown’s Gas in Roswell.

STAMP APPLICATIONS - Lon Glazner
A powerful graphic liquid crystal display (LCD).