Hi, gang. For the train guys out here, I'm working on juicing a frog on a DCC layout.
For those who saw that as greek, sorry. I need to reverse the polarity of a piece of track.
My first thought was a pair of non-latching relays that the Arduino would flip as needed. Then I wondered can a relay work backwards. eg, NO and NC are the input, and the COM is the output?
Again thanks. I'm way more of a programmer than I am an electronics guy.