Modelling Sound                 Presented at the 3rd Australian Narrow Gauge Convention (Sydney '98)

Digital sound modules                 How to incorporate digital sound modules inrto your layout

The Shuttle                          A throttle circuit to shuttle a train automatically between two stops

The Speedometer                Using a $A12 bicycle speedo to show scale speed on your model railway

Optical Turntable Indexer   A simple circuit using optical detectors and latching relays

Lighthouse Beam Simulator   Want to simulate a rotating lighthouse beam? Try this simple circuit.