A bridge rectifier, a capacitor, and a buck converter walked into a bar.

My grandson likes running my Flyer trains and one of his favorite cars is the searchlight car. This entails turning off all the lights in the train room and watching the light cast shadows on the walls and other rolling stock. But the flickering and anemic light always bothered me. So, using leftover parts from my junk box, I came up with this proof of concept. The light itself is pretty much snapped together except for the two screws that mount it to the yoke. The photos should be self explanatory. I will likely go back to it, tidy up the wiring, build some sort of tool box to cover the electronics, and make it look more realistic. I don’t know if there is a screw base led instead of a strip of three (used them in my passenger cars) that could replace the original incandescent but it would still need the electronics.