This is from Roads and Rails...from their DCC sound installation
I thought I was finished but all the lights came on together, I like them to be directional so that I can easily see which way the model is gonna move, so I looked at the PCB and noticed that there was a green wire bridging two components, which looked like a bit of an after thought, so i took it off, and it made the lights directional, but backwards! So I have reversed the light outputs in the function mapping and it works now, any decoders you buy from us will already have this change made.
Chris