Circuit Diagrams

Below is a collection of circuit diagrams I have put together for various model railway uses, the styles tend to vary as I've generally just scribbled them together when needed, I hope that they are found to be of some use.

Controllers

My Mark 1 Transistor Controller was my first home made controller, the circuit was copied from a commercial panel mount unit I was using on my layout at the time.

My Mark 2 Transistor Controller is the result of experimenting with the mark one design, I essentially made it a little cheaper, while making it's speed control smoother.

My Inertia Transistor Controller is the same as the Mark 2, but wth a few extra components to give an inertia effect.

I also came up with a design for a Transistor Controller for Common Return wiring.

This is a simple circuit for a couple of battery controllers.

Point Motors/Switch machines

This circuit allows twin solenoid point motors (Hornby/Peco/Seep) to be operated using an ordinary SPDT switch.

By using a DPDT switch with the above circuit a Bicolour LED can be used to show the route setting.

A similar circuit can be used to operate Kato style point motors.

Other Circuits

This circuit allows a turntable to be operated with just a single push button. It is designed for turntables which have only a single line connecting to them, and is not meant to be a full indexing circuit. It is however ideal for turntables which are used soley for turning loco's.

There are some additional diagrams for use with installing the motor and microswitches available here and here.

Here is a simple circuit for constant light on DCC without using a decoder - usefull in coaches and brake vans.

And here is an enlarged board schematic for the above