Above, my second CO from Neobux
Thanks a lot, NB!
I still hope there are other next CO from you
Yeaaah!!!
The gift of life should not be wasted anymore, instruct each other in goodness, a lot of good to each other, trying to help each other will make a more meaningful life for themselves and the people.
Gone are the days when people's interest could
be held by simple radio or television. Today we're
bombarded with information and we crave interac-
tive experiences that don't waste a single second
of our time. Advertisers recognize the difficulty of
presenting messages that cut through the clutter,
and they've come up with creative ways to capture
our attention.
One example: the multimedia kiosk, now common
in shopping malls, movie theaters, and airports.
Complete with an internal computer, sound card,
and video graphics monitor, these dazzle stations
can be a powerful advertising tool --- especially
when they have motion detection circuitry that
triggers a video presentation at the precise moment
an unsuspecting patron comes near.
This article explains how to construct a USB
motion detector that will give your computer this
hey-you ability, using a free Windows presentation
applet I wrote, USB Multimedia Presenter, so that you
can start your own kiosk advertising campaign. You
can also use the setup for practical jokes, or just to
amaze or amuse your friends.
...
Currently, I'm obsessed with analog telephones.
I don't know why. My last obsession was with the
severed hands of mummies, but let's not get into
that. Today it's phones. And these Ghost Phones are
fun. The idea is simple: hide an MP3 player and its
headphone inside an old analog telephone, and you
can listen to someone talking to you!
BEATIFUL ACOUSTICS
Use a broken speaker, bits of wire, and
tape to prepare a coneless voice coil
driver, then use it to generate standing
waves on a sheet of metal, making
sound visible. Magic!
My knowledgeable friend Robin once
said that you don't need to worry about
having too big an audio amplifier,
because speakers are usually damaged
by under-powered amps working too hard
and clipping the signal, creating rough
square waves with too much power.
I learned that this is true when I melted
a speaker's coil by running a strong
20Hz signal through it, to drive a vortex
cannon (MAKE, Volume 15, page 114).
On the bright side, I now had a nice
speaker magnet to use as the foundation
for something else I wanted to try,
a Chladni plate!
...