I'm using a 9v input to power 3 arduinos at the minute, it seems to work ok but as of today one of my arduinos seems to have a fried regulator. It works fine over USB but when I plug it into the 9 volt supply the power pin barely lights up and it doesn't run.
Could anyone shed some light on how I am going wrong?
I have the 9 volt supply coming in and onto some stripboard where the two lines feed off to the Vin and GND of the 3 arduinos in parallel. Is there a safer way to do this?