Finally got the crossing gates installed and operational. Controller is Azatrax MRX2 and uses six IR track sensors embedded in the track. Board runs a tortise slow motor that actuates two NJI gates. The bell is from a discarded MTH flasher set.
Very pleased withe Azatrax system as it performs flawlessly under all lighting conditions.
The main scene is deliberatly dark to emphasize the gates and so you don't see the back walls of layout. Unfortunately camera focus isn't real sharp as camera seems to focus on some object in distance.
The YouTube links:
Main scene, bell cuts out when gates are fully decended:
http://www.youtube.com/watch?v=QO83LoCTxw0
Video of Tortise and bell cranks movements:
http://www.youtube.com/watch?v=iwru2Mz3WIU
Operation of Azatrax board as train moves across sensors:
http://www.youtube.com/watch?v=ORdzwCSUKj0
Enjoy.
