Railway circuits

Posted on Feb 6, 2014

Digital Command Control, for those who don`t know, offers many advantages over conventional DC analogue control systems. The main one being the simplicity of wiring. DCC allows one to control many locomotives individually on the layout without having to electrically isolate parts of the track. The only exceptions being the number of locomotives dr

Railway circuits
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awing current from the track and reverse loops. I wont go into too much detail here since there are plenty of other web sites devoted to this. For the layout I`ve adopted a "Bus" wiring method whereby a pair of wires carrying the DCC power/signal (the bus) is run around under the layout and tapped with feeds from the track. No particular reason for using speaker wire other than that it seemed silly to go out and buy special wire when I had great knotted balls of speaker wire cluttering up the wardrobe. If I was buying wire specially for the job I would probably use black and red pair, thick for the bus and not so thick for the feeds, just to make it easier to identify which rail is going to which side of the bus pair. As it is the feed wires are a little thick and obtrusive where they are soldered onto the track. The Pug disassembled. I had to cut the weight horizontally from front to back then cut the top piece down to fit the decoder in. The decoder is a Digitrax DH121. If I was doing it today I`d use a DZ123, which is a quarter of the size and has ample power for a little Pug. I mounted point motors under the baseboard rather than directly to the bottom of the points. This initially presented some problems because firstly the actuator pins were too short and secondly it was very difficult to line them up with the point. I extended the pins by crimping some 1. 2mm piano wire onto the pin with some 3mm brass tubing (sorry,...

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