RANDOM NUMBER DEVICE -PART 2 Use the random numbers generated from last month to implement message encryption using the theoretically unbreakable "one-time pad" scheme. by Jack Dennon
BUILD AN RC MOTOR TACHOMETER Knowing the speed of your RC motor while testing a particular set-up can be useful information in the quest for optimum performance. by Alonzo Trueland Related Information
MEASURE EARTH TIDES WITH A TILTOMETER Can earthquakes be predicted? Some scientists say yes, with the use of a tiltometer and measuring the earth tides. Here's how to build one. by Ron Newton Related Information
FEATURES
DEVELOPER-FRIENDLY USB Take a USB-based product design from start to finish for acquiring temperature data from two digital temperature sensors. by Don L. Powrie
FRS RANGE WARS The distinction between must-Iicense and no-license handheld radios is becoming blurred. by Gordon West
ELENCO'S ELECTRONIC SNAP CIRCUITS Children ages 8 to 108 can enjoy hours of educational fun while learning about basic electricity and electronics with these unique kits. by Fred Blechman
UNDERSTANDING AND USING 'OTA' OP-AMP ICs -PART 2 Take a look at the operating principles and practical applications of the LMI 3700 dual operational transconductance amplifier IC. by Ray Marston
COLUMNS
AMATEUR ROBOTICS See how easily multiple controllers can be made to work together. Related Information
ELECTRONICS Q&A What's Up: Several readers have very good thoughts and ideas that add to my response about CATV cabling before plastering the walls. Into vintage tube radios? Here are two common fixes. A couple of minor circuits dealing with lamps and audio signals, and a family of low-voltage audio power amplifier ICs.
IN THE TRENCHES For Design Engineers facing real-world problems. This month: Software Documentation.
JUST FOR STARTERS Basics for beginners. This month: Understanding phone systems. !
LASER INSIGHT An experimental set-up for producing your own holograms.
LET'S GET TECHNICAL Inside Protected Mode Part 2: Protection and Multitasking.
MICRO MEMORIES The birth of X 10 and the dawn of home automation.
STAMP APPLICATIONS Keyboard Entry and Display. "Imitation" is an excellent opportunity for learning. Related Information
TECHKNOWLEDGEY 2003 Flying electronic "nose" sniffs out noxious gases; New standard will define MIDI networking techniques; Free teleconferencing software introduced; Spatial display produces 3-D images; Power supply IC replaces linear transformers; and Holonyak named recipient of 2003 IEEE Medal of Honor.
