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led signals
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I have a post, and a question here. <br /> <br />I just installed a Circuitron DT-4 (Optical rolling stock detector.) <br /> <br />[url]http://www.walthers.com/exec/productinfo/800-5204[/url] <br /> <br />First, let me say I highly recommend this product. The instructions were perfect, installation wasn't that difficult, it is really easy to "tune" and it works great! <br /> <br />I attached this to a typical three wire pre-built signal mast, and it is awesome! When the train "closes" the first optical sensor by rolling over the sensor, it turns the light red for the "joining" diverging route. It stays red untill the last UNMODIFIED (I stress that because there was none of this "get the right resistor, and metal wheels, and glue, and repeat for all rolling stock" stuff that you have to have for voltage based block detectors,) car rolls over the last sensor! <br /> <br />I want to have that light "delay" a little longer so here's my question. Because lighting can "trip" the system between cars, or with high body rolling stock, I want the light to last about three seconds from the moment it triggers, until it releases. What do I do to build / buy a simple 12V DC delay? <br /> <br />I have looked all over the web, and I cannot find an answer.
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