I discovered this author yesterday and think I could get this working with a bit of work. https://rudysarduinoprojects.wordpress.com/2019/05/06/fun-with-arduino-29-dcc-accessory-decoder/ Video 30 goes over making this a servo controller as well. When I ordered parts the diode specs wasn't listed and I found another diagram online with the diode but with a additional resistor on the out put end. Attached photo. Question is what schematic would be best to use, the author or the one with the additional resistor? And I'd like to add a power indicator LED to the circuit as well but I'm not sure where to add it or how.