I am trying to see if its possible to monitor the health of the two 5v power inputs. All I can see is one hwvoltage which I presume is the internal 5v rail. I would like a warning if the backup power fails.
I guess its possible to put the 2nd 5v in on the volt monitoring pin of the power port but its not a neat solution.
Also, will the cube run off the servo rail if the 2 main inputs fail? I see it lights up but does not play the buzzer self check if supplied from just the servo rail.
Any link to more detailed documentation and circuit diagrams please?