Gilbert instruction sheets concerning automatic circuits were scanty at best.
The 761 semaphore can stop trains or just serve as a show piece. It can be activated by a #697 trip, a #670 trip, two push buttons, a Flyer switch controller, optical detectors, current detectors, or a combination of several of these. It can be wired to a flyer switch, and serve as a sort of latching relay. Two or more semaphores can be wired in tandem; they can even be cross wired so that when one goes up the other goes down. Some of the more sophisticated solid state detectors can control the length of the current burst they produce to protect the solenoids, or the white wire can control a 4 pole relay that cuts off power to the solenoids after the semaphore is thrown. A relay or relays controlled by the white wire can power and unpower a series of stop sections, or initiate an action sequence. You can probably build a completely protected multiple train loop using three or more, but I haven't tried that yet. It can even be wired backwards and produce a burst of fixed voltage out the white wire, if you like jackrabbit starts. Have fun with the thing! Tom Jarcho P.S.: I once wrote a Roundhouse on a few of these methods (Jan-Feb '95 S Gaugian) . S-Trains list sponsor: http://www.americanflyertrains.com All the Flyer you desire...books and accessories too! To UNSUBSCRIBE from this list send a note to [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
