Battery Desulfator Circuit by hitman -- Homemade battery desulfator circuit constructed around an IC 555, diodes, resistors, and a 15V DC power supply. http://www.homemadetools.net/homemade-battery-desulfator-circuit
Hex beam antenna cheat sheet for ham radio. Fiberglass Tubes, Wire, and Rope available at http://www.mgs4u.com/hexbeam-kit.htm
This story features diagrams that show how to wire three-way switches. The wiring is more complicated than a traditional single-pole switch, but we'll explain how to make the connections. Once you're done, you’ll be able to control a light from two switches.