FWIW, The CIRCUITRON FL-3 is a complete solid state flasher with three independent outputs that can be used to alternately flash sets of incandescent lamps or LEDs at three separate locations. Three control terminals are provided for use with CIRCUITRON Detection circuits, and this allows individual control of each of the locations. Alternately, the three control terminals may be connected together for increased current capability to provide a heavy duty flasher with a maximum capacity of 750 ma. on each side. The FL-3 contains on-board regulation to allow the unit to be powered by 10-18 volts AC or DC. Best performance will be achieved, however, when a DC power supply is used. The FL-3 measures 3? x 3?.
Another option, this DC based motorcycle light flasher module. Yes, this would require using a DC power source and would have to be DC common to layout common, but a massive 10A capacity
Skip that- found this one a perfect wig wag 10A capable. Yes, DC, but we can make that work. $25 There is even a customer who made a video of it running an actual bulb based crossing flasher.
