Another video update on successfully installing digital control in the garden. I got a second electrical box installed next to the existing box, connected the two up, and added the transformer, controller and some box which all needed for the Marklin digital system.
Since I want the ability to run analogue as well, I fabricated an input selector for track power. It is a rotary selector switch which drives set of relays (2 for each channel), selecting which input should go to the track. Channel 1 became digital, channel 2 analogue and channel 3 is for external power (LGB, analogue DC, etc.). The rotary switch only runs on low power hence I added the relays. The entire board runs off 5V from USB mobile phone charger. I also added LED indicators to tell which input is selected.
As opposed to my other videos there are some train footage at the end. Enjoy.
[youtube]http://www.youtube.com/watch?v=HtYY3btCdDo[/youtube]