The work on the rebuilding of the lower staging yard, also known as Sparks is entering it's second month. All of the track work has now been completed. The turnout motors have been installed, wired and tested for correct connections to the frogs, and the control panel has been completed.
The control circuits need to be finished for that control panel to do much. It was originally intended to reuse the Digitrax DS64 decoders but I discovered that the MP5 turnout motors draw too much current for them so I am needing to build control circuits to replace it. A new control circuit has now been finished for the siding that is on the return track. This will allow momentary push button switches to control the route selection.
Below is the schematic diagram of the circuit I am working on now. This includes the diode matrix and Set / Reset logic circuits to latch relays that control the polarity of the voltage applied to the turnout motors. This will also allow for single push button route selection of 4 tracks in the yard.