
PROJECTS: Electronics Fun & Fundamentals
CHARLES PLATT is the
author of Make: Electronics,
an introductory book that
has sold more than 300,000
copies in the USA. He lives
in a remote area where he
designs and builds prototypes of laboratory
equipment. makershed.com/platt
Adobe Stock-Maxim_Kazmin
Is there any form of electronic communication,
these days, that is absolutely, positively secure?
Yes, indeed! If you have a friend whose home or
office is visible from yours, a laser beam would be
difficult to intercept. The question is, how would
you modulate the beam to carry your secret
messages?
Morse code is one answer, but if you don’t
want to ...