The Rottenkraftwagen KLV 53 is a funny little track work engine. As any other train in N scale, it’s even better with sound!
The “Rottenkraftwagen” is a small service locomotive. Hobbytrain has released numerous versions in N-Scale, always with an accompanying car (containing the motor). I was inspired by an online video that convinced me to install sound in this model (look at the nice job they did here).
The model runs pretty well, all wheels have power feeders (the main engine is linked to the trailer with 2 wires).
I decided not to install headlights (the model doesn’t have any), and concentrate on a clean installation of Doehler & Haass Next18 sound decoder, the SD18A. As you’ve seen in recent posts (here or here), I have become quite fond of the Next18 digital interface. So here was my plan:
For a while now, I have included a buffer with electronic capacitors in most models. This really greatly improves the train’s behaviour. In N-Scale models, sometimes only SMD (small size) components can fit, and it is the case here. Again, the advantage of the Next18 interface is that the plus and the negative (GND) poles are available, as the norm requires, which is just what we need for a buffer circuit.
Here is schematic of the buffer circuit, FYI:
This circuit is much better explained and presented on the German website 1001-Digital, so if you speak German, read on there! Here is a short reminder of what those pieces do:
Here are all the detailed pictures that should speak for themselves. If you have questions, don’t hesitate to ask in the comments section.
Minitrix Köf II updated with DH06A decoder
Doehler & Haass Programmer review
Digital model railroading: 2017 news roundup
Occupancy detection: S88 vs. Loconet
Fleischmann BR01.10 with added sound
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