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Reply to "Simple accessory-voltage flasher?"

@JohnActon posted:

Search  for  "Flasher Board" on ebay.  OR, search " 1X Compact Circuit Board Flasher to Flash Crossing Signal

Alternately"

FLASHER

Looks like an economical solution - $9 each including shipping for one, $15 for two.

A couple of observations / questions from someone who isn't an electronics guru:

1) Input says 3-12v DC.  If the crossing signal is initiated by an insulated track section (sends AC from the track), is it correct to assume that a relay and DC power source are also needed to provide the appropriate input voltage? 

2) Output is 3-12v DC to power LEDs.  If the signal has incandescent bulbs, what else needs to be added between the output terminals and the bulbs? 

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