I've been asked by my local model railway club to build a circuit that will light up houses and shops randomly on the new layout currently under construction. My first reaction was to use a tested and working multi-aspect European road traffic light circuit, substituting the coloured LED's for white ones, and slow the sequence down a high value resistor.
Unfortunately, the builder is determined to use 12v grain of wheat bulbs; I don't have any design skills and I tend to build circuits from existing diagrams - but I don't have any circuits that will do this job. The only suggestion I can think of is to wire the bulbs to a series of mult-pole rotary switches and mechanically turn on and change the lighting. This seems a bit ham-fisted, though.
Anybody got any suggestions or links to a circuit?
Thanks. Bru