I have a question about a schematic for reading out the DCC code for the Arduino. DCC is a protocol for modelroading: controlling trains,turnouts,signals,...
You can set CV's (settings) to a DCC decoder. But you can also read out the values. To read out the values the DCC decoder have to give feedback by turning the DCC ACK-pin high (which is connected to the tracks. But how it's connected I don't know. I found only a schematic with an optocoupler to read out the DCC commands.
Somebody who knows this?
library with some explanation: http://sourceforge.net/projects/mrrwa/files/