John, Which LEDs do you use for marker lights, ditch lights, mars lights? What do you use for the filtered DC power supply? TIA Pat B.
I "roll my own" power for stuff like the MARS simulator. Typically, I'll use this one with a 12V regulator for the MARS board.
For steam, I'm still using the 2mm ceramic LEDs, I grabbed a quantity of them before they went out of production. I have red, yellow, and green.
I frequently use 2mm post LEDs for diesel markers, they work well.
You can drill a 2mm hole and stuff them through the shell. I hot glue them when I get the correct amount of projection on the outside of the shell. Of course, I pre-wire all if the stuff and make a lighting harness, then I just lay it in and stick the wires down and the LEDs in place.