This collection of video and a few audio files represents files that have been featured on the RF
Cafe homepage. Every week or so a new file is added that should be of interest to RF Cafe visitors.
Please send me an
if you have
a good subject. Videos for Engineers formerly went
by the name "Cool Videos."
is very cool animation of global commercial airline traffic over a 24-hour period. Watch the distinct patterns
form and dissipate as the day/night terminator moves across the face of the Earth.
almost all the garage door openers in one neighborhood stopped working around Christmas Eve. The hard-wired
wall switches work, and some remote controllers work when inside the garage, but not outside. People are
blaming the nearby military base, but the Fed says no way. I suspect someone attempted a hijacking of the
openers' codes. It is doubtful that a single RF interferer could affect so many systems without being obvious
in other ways. Do you have a theory?
Navy recently set a new world record for the most powerful electromagnetic railgun ever fired. The gun fired
an aluminum projectile at 10.68 megajoules, traveling at 2,500 meters per second (Mach 7). Eventually, the
Navy wants to produce a 64 MJ version with a 200 nautical mile range that will fire 3,000 rounds per gun
barrel. This will keep dangerous gunpowder loads off the ship.
Currens Ventosa. That is a new "species" as dubbed by it progenitor,
Theo Jansen. Theo's massive creations are
amazingly sophisticated mechanical contraptions "created" to roam open beaches throughout their natural lives.
His "bone yard" is full of "extinct" models that have succumbed to natural selection due to an imperfect
creator. Here is the webcam inside his
out how to enter the IEEE-USA's online video scholarship competition for engineering undergraduates. Titled
"How Engineers Make a World of Difference," this effort is designed to inspire junior high school students to
prepare for an engineering career. Total of $5,000 in prizes available (it was $10k last year). Entries due by
16 January 2009. Here is last year's
energy transfer is getting a lot of press these days, with the ultimate goal being not just wireless but also
battery-less devices. To illustrate the concept, Robin Massink, from the Netherlands, has built this magnetic
levitation light bulb - very cool.
another step closer to true humanoid robots, Canadian Trung Le, has introduced Aiko to the world. His
extensive background in software and robotics led to developing Biometric Robot Artificial Intelligence Neural
System (aka B.R.A.I.N.S.) software to control Aiko. She can read, recognize objects, respond to touch, and
perform physical tasks. Some have dubbed Aiko "She-3PO."
1959 video shows a precision approach radar system (FPN-16) that was part of the one I worked on in the USAF.
It is shown sitting on a turntable at
Craig AFB, Selma, AL. Here is a
photo I took of the PAR display on
one of our radar shop's MPN-14, ASR-PAR mobile radars, circa 1981. Hi Don!
opening frame here displays, "In this film we shall study scientific principles involved in the operation of
common home electrical appliances." See what the 1940s "modern home" looked like - it would be considered
lower class today. Thankfully, gone are the bad old days of no safety grounds and no double insulated plastic
cases (recall that plastic did not come into widespread use until the 1950s).
to what happens when this inexperienced German Coast Guard radio operator receives his first "mayday" call.
while buried all day in a lab, peering through a microscope to laser trim a power amplifier tuning circuit or
to solder down an 0201 resistor, it is easy to forget about the macro scale projects at the other end of the
electrical / electronics spectrum. This IEEE.TV tour of the Hoover Dam covers a bit of history and the inner
workings. Be sure to visit the official
Hoover Dam site and look at the old construction photos. It is pretty dam[n] inspiring.
said it before, but I'll say it again: Japanese advances in humanoid robots has been absolutely amazing and
unparalleled. This miniature "Murata Boy" incorporates multiple sensors for achieving balance, navigation, and
obstacle avoidance skills. Its technology has applications in real-world vehicle stabilization and navigation
roles, and for handicap assistance. The video is a bit slow moving (made at the Electronica 2008 show), but it
is worth watching the entire show just to see what this little dude can do.