Over the years, infrared
remote control
units have become
better designed and
more reliable. They
retain a few weak
facilities, however,
owing to the laws of
nature. Their range is
fairly limited and
there needs to be a
straight and clear line
of sight between
receiver and controller.
These weaknesses
may be obviated
with the extension
unit described in
this article, which has
been designed primarily
for use with
Type RC5 remote
controllers.
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