1 pcs compact Circuit Board to make the crossing signals flash Alternately

Price is for 1 pcsCompact Circuit Board tomake the crossing signals flash AlternatelySuitable for all scale 4 wires crossing signals( not suitable for common anode or common cathode crossing signals)    when power on, the 2 lights will flash alternatively    Functions: when power on, the 2 lights will flash alternativelyor May use it with my Logic Delay Switches Circuit Board and turn on your crossing signals automatically when your train is coming.Click here to view the video         Click here to view the wiring.PRODUCT  DESCRIPTION  Size: 33mm x 26mm&...