Those modules only handle 23V DC maximum, rectified 18V track power will usually exceed that, something to keep in mind. I use similar modules that have a 28VDC maximum in a little P/S module I created. You'll need at least a rectifier and a filter cap, and for DCS compatibility, the 22uh choke. Here's The board I used and my module perched on top that adds the choke, bridge, and filter caps. Note the hole in the upper PCB to allow for voltage adjustment.
This is the schematic for the module. I have a jumper option to use full-wave or half-wave rectification. That's useful as most TMCC stuff has a common AC and DC ground. If I use this in a TMCC environment where I want the DC to have a common ground, I use the half-wave feature. If I don't mind the DC requiring total isolation, I use the more efficient full-wave feature.
John H posted:I have a good reason right here. $18 gets you two modules and the only thing to add is a light strip. That was my point in my post. I think it's a pretty good deal.
In Greg's defense, he's talking about ten of the modules for that price. Of course, you do have to add the other components to make a complete solution.
