I am using an Arduino Mega 2560 with only an Ethernet Shield. I want to power an external wireless and display device from the Mega's 5V supply.Can anyone tell me the maximum current taken by the Arduino Mega 2560 and the Arduino Ethernet Shield. I can't find this specified anywhere. I believe that the 5V regulator is capable of delivering 800mA.Thanks
Maybe it'll be best to do an experiment: supply it from a bench 5V supply and measure the current? I'll have to check, of course, if its OK to "backfeed" the MC33269D-5.0.