Here is the link for a 1 Amp LED/Incandescent Lamp Flasher Using Mosfets from about a month ago. This circuit flashes two lamps alternately at about 1 Hz, the speed can be varied by using slightly different value components. It is easy through-hole assembly and the cost to produce them is very reasonable. Boards can be ordered online easily using the Gerber files included. This board works equally well with leds or bulbs such as the PW #154 Lionel crossing signal, which has no internal circuitry of its own. BOM's and User Notes are included.
Link: https://ogrforum.ogaugerr.com/...-board-using-mosfets
Direct link to build files: files
Rod