New twist on IR detection

Bob, Is this for a three rail track system your talking about? Also maybe more about IR Detection. Maybe take a Picture of it because I never heard of them before. I think its a track detector circuit type relay. You would have to till me how they work. 

I'm going to google them to get familia about them.

John, Kb2agpjohn@aol.com or 848-992-2157 on my cell phone

John, my layout is 3-rail Ogauge. The proximity module is Sharp #GP2Y0A21YK (CAT# OSU-80 at ALL). The data sheet is on-line at the Sharp website. The backup circuit is ridiculously simple with only 4 components. I have never built anything before without an idea how I would use it, so I am in new territory.  

Perhaps a series of LEDs (green, yellow, red) could light up as a train approaches a station, operating accessory, or track bumper to signal when to stop.  If not on the layout, on the control panel.

Perhaps you could have an external speaker that simulates a horn with Doppler effect as train approaches then goes past some point.

Will,

Please go to Integrated Signals sytems.com They have some nice Signals for train layout there.

Thanks John 

That idea about a series of LED signal lights is interesting. By routing the sensor signal output to three transistor/relay circuits and setting each to a different distance setting, the lights would come on in sequence as the train approached the sensor. Definitely have to try this out. Thanks!