http://www.jensen-transformers.com/an/an005.pdf
This flasher gives 3 to 8 flashes, at reduced intensity, and then goes solid. They do not have the 'strobe' effect in any way or form.
http://www.uoguelph.ca/~antoon/circ/flashing.htm
Map service to find their exact latitude and longitude of observing area location.
http://tiger.census.gov/cgi-bin/mapbrowse-tbl
Did you know there are at least 6 different kinds of timers? This circuit implements all of them!
http://www.nutchip.com/progetti/timer_en.htm
http://www.rhombus-ind.com/app-note/dcr-z.pdf
Part of a Masters thesis by Joachim Johansson and Urban Lundgren. Starts out with derivations of the general transmission line equations, followed by the time-harmonic equations. This is followed by derivation of basic transmission line formulas, such as
http://www.sm.luth.se/~urban/master/Theory/4.html
Ruthroff 1:4 coax transformer, both the balun and unun forms.
http://www.bytemark.com/products/tlttheory.htm
Make a simple laser communicator that converts a sound source into light that travels across a room, and back into sound with very little quality loss.
http://scitoys.com/scitoys/scitoys/light/light.html#laser_communicator
Amateur radio direction finding, transmitter hunting, by triangulating a radio signals direction and plotting its bearing on a map. Hunters use Dopplers for tracking hidden transmitters anywhere in the San Francisco Bay Area.
http://www.thunt.org/
This circuit is a triple, relative-humidity sensor and radio transmitter.
http://www.edn.com/article/CA244148.html