I visualize something fairly simple but flexible, perhaps with the following attributes.
- Insulated Rail Input & Optical sensor input, user selectable.
- Lamp outputs for LED or incandescent bulbs.
- 3-aspect signal capability (red, yellow, green) with automatic delay.
- RR Crossing flasher outputs.
- Output for occupied track section for chaining signals (optional use).
- Input for next track occupied for chaining signals (optional use).
This would fill most of the basic requirements. I'm sure there are tons of other things you could do, but you can also drive yourself crazy trying to add features.
