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04-20-2011, 07:16 PM
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#6 |
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Senior Member
Join Date: Jun 2002
Location: Southern California
Posts: 560
Likes: 45
Liked 52 Times in 17 Posts
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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'
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Bernie Cunningham 7053 STK |
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