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Bernie Cunningham · 04-20-2011, 07:16 PM

As far as I know, that type of sensor is no longer used, as in where light reflections or flashes would cause them to 'switch'.

These days the units are a sender and receiver across the track and must communicate with each other to 'switch'

04-20-2011, 07:16 PM	#5
Bernie Cunningham Senior Member Join Date: Jun 2002 Location: Southern California Posts: 560 Likes: 45 Liked 52 Times in 17 Posts	Re: Red Light Answer As far as I know, that type of sensor is no longer used, as in where light reflections or flashes would cause them to 'switch'. These days the units are a sender and receiver across the track and must communicate with each other to 'switch' __________________ Bernie Cunningham 7053 STK