Does anyone know of a inexpensive means of controlling 3 color signals in a reasonably realistic way? The commercial systems that I have seen seem to require you be independently wealthy, which I'm not.
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https://ogrforum.com/t...al-with-lionel-153ir
If you're up for component-level DIY assembly, the above thread describes one method that should cost less than $5 per signal. I think the cheapest detection/activation method is insulated outer-rail with SPDT relay ($1) rather than an ITAD.
I bought some of these, I got five for $54 as I recall. I don't see the 5 auction, but these are pretty close.
http://www.ebay.com/itm/Logic-...;hash=item3a706beaad
They have a programmable delay for the yellow up to 10 seconds when transitioning from the red to green. They come with a magnetic reed switch, and a set of IR transmitter/receiver parts so you have several ways to trigger the signals. I wired the IR sensors in a track marker to reflect off passing trains, works great.
Here's a link to the instructions.
Here's a 3 color signal that requires just 3 extra diodes over the standard circuit of LEDs and resistors.
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No offense Gary, but I'm not equipped with bionic eyes, I can't read something that small! 
Here is a prototypical way with 2 relays
www.jcstudiosinc.com/BlogShowT...=577&categoryId=
A simulated delay circuit can also be made with 2 relays and a capacitor,
Dale H
No offense Gary, but I'm not equipped with bionic eyes, I can't read something that small!
It's a 49KB picture but when I upload it to the forum it comes in at 1 KB. Any ideas?
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Looks like you're uploading the thumbnail to the forum and not the actual picture.
This is a 392KB upload. The green signal in this schematic is approach lighting. To have the green on normally take it's lead off block 1 and attach it to the common at the bottom rail.
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