Like many I just connect things up as per instructions and usually they work and I don't worry too much about the technical innards However am I right in thinking that a decoder controls a motor by pulse width rather than just outputting DC at lower volts like an analogue controller or can you get a decoder that does? Reason I'm asking is that I have a wildlife observation camera in the garden and it does seem to eat batterys. It has an input for 6 volts DC and as I have an accessory bus that is near all the places I use the camera it would be an easy way to supply it without the faff of putting in another power supply for it.
G.Harman