Route Setting

With each junction and magnetic stop controlled by an individual switch even a simple layout like the test track offers plenty of opportunity for operating the wrong switch. On a larger layout the possibilities for error increase dramatically, as does the number of switches to be operated to select a route. What is needed is a system of route setting where a single switch can set a number of junctions and magnetic stops at once.

As it is impossible to visually tell how junctions and magnetic stops are set some form of indicator would also be useful. Also on the wish list is the ability to control junctions and magnetic stops from more than one location, either manually or under computer control.

The first requirement is to provide a bit of electronics to drive the motor in the junction or magnetic stop. This will consist of a CMOS bistable (flip-flop) feeding an H-bridge driver for the motor and LEDs to indicate the setting. Input can be from one or more of the following: a switch (exactly as now), a diode matrix (for route setting) or a computer output. The prototype circuit has undergone several iterations and is currently awaiting rebuilding (again).

Update:
As I am now using servos and the MERG servo controller for junctions (and any magnetic stops that may be needed) and DCCar infra-red stops, all of which will normally be controlled by computer the special circuit for powering small motors is not needed and has been filed. I have left this page in place just in case it is of use.