Quarter Gauger 48 posted:Dj, it all sounds more difficult than it is.. Take a look at the Model Software, Evan Designs, web site. They have already wired, AC/DC 7-19 Volts in 3MM bulbs (LED) that are perfect for what you want to do.
They're NOT perfect for what he wants to do! I think you should understand the application before leading someone down the garden path!
He wants to add operating ditch lights to a PS/3 locomotive. That requires a BARE LED as that's what the PS/3 electronics expects to see. The Evan's LED's have no place here.