Control the Signals etc... automatically by trains, Delay Switches Circuit Board

Price is for 1 pcsMulti-FunctionLogic Delay Switches Circuit BoardSuitable for all scale signals etc...    Functions:Usage 1: Control a 3 aspects signals:       The Green light is normally ON, when the moving train covers the infrared (IR) sensor, or when the magnet placed on the train active the reed switch, the green light turn off and the Red Light turn on, after a delay ( adjustable ), the Red Light turn off and the Yellow Light turn on, after another delay, theYellow Light turn off and the green light turn on again.    ...