August 2004 Issue

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PROJECTS
BUILD A VACUUM TUBE AMP
Enjoy the glow of vacuum tubes while you
listen to your favorite tunes.
by Bob Armstrong
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BUILD A WHITE LED NIGHT LIGHT
Make use of this uncommonly colored LED in
your home.
by Steve Lawson
THE ENIGMA MACHINE, PART 3
Explore some subtle and strange electrical
effects.
by Gerard Fonte
FEATURES
A NEW LIFE FOR LORAN
Inside the Coast Guard’s LOng RAnge
Navigation system.
by Clifford Appel
HUGO GERNSBACK’S LEGACY
Exploring the career of a pioneer in the field
of electronics.
by Michael Banks
SMITH CHART FUNDAMENTALS
Learn about this often misunderstood, but
valuable, radio communications tool.
by Christopher Horne
TETSUJIN 2004
The cutting edge event sponsored by our sister publication, SERVO Magazine.


COLUMNS
TECHKNOWLEDGEY 2004
Nonocrystals; innovative fuel cells; the next
supercomputer; audio blogging; and more.
JUST FOR STARTERS
Basic units for DC circuits.
PERSONAL ROBOTICS
A little bit of everything!
  IN THE TRENCHES
For design engineers facing real world
problems. This month: identifying bad ideas.
Q & A
Ma Bell returns; attic thermostats; security
websites; and more.
STAMP APPLICATIONS
Easier remote control with Bluetooth.
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NEAR SPACE
Build a temperature sensor for your data
logger.
OPEN COMMUNICATION
Go totally wireless with ZigBee.

THE DESIGN CYCLE
Exploring random numbers.
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