I am updating my control panel and would like to add dwarf signals to the layout. I am using the MTH DCS system (TIU now, thinking of adding the AIU) with TMCC. I run will be running the layout in DCS or conventional, depending on with trains I want to run and who is bring over their equipment to try. I have decided to set my control panel up with a power switch to change from DCS to conventional transformer control. Anyway, the Atlas 21th system looks right to me but is on backorder everywhere and is kind of expensive (I think). I found some dwarf lights on the bay but need to know how to tie them into my switches. is there another relay I can buy or build I can wire in between the switch controller/AIU and the switch machine other than the 6931 Atlas unit.
Dan