I am new to RAMPS, I have a RAMPS v1.4 as an upgrade to my 3D printer. My question / problem is I do not want to have a PC connected and running all the time since the setup I have has an SD card reader on full graphics LCD display board. I thought the Arduino was supposed to get power from the RAMPS shield but I guess I am wrong in that assumption. Can I power the Arduino with a wall wart plugged into the barrel connector? What ratings do I need to look for in a wall wart to power the Arduino? Can I safely use a 12 volt supply plugged into the barrel connector of the Arduino? Should I remove the D1 diode? Thanks, sorry for asking these questions if they have already been asked and answered,
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