» Model Railroad Electronic Circuits    Easy electronic circuits you can build, including crossing flasher, constant directional lighting, train detectors, and power supplies. Provided by Mark Rollins.    http://www.mrollins.com/circuit.html

» Model Railroad Electronics    Electronic circuits for use on a model railroads including -crossing light flashers, block occupancy detectors, train position detectors, simple signals, throttles, switch machines and automatic reverse loop circuits.    http://home.cogeco.ca/~rpaisley4/CircuitIndex.html

» Model Railroad Technical Information    Basic to expert tips and methods to improve performance and fabrication skills with examples plus over three hundred pictures and drawings.    http://www.geocities.com/budb3/