December 5, 2013
I set up my Arduino Micro with this step up powered by 2 AA batteries and plugged into the 5V and GND. Can I leave it plugged into 5V and GND with the batteries switched off when I plug the Arduino into the USB or would the 5V output of the Arduino cause problems in the step up?
AA Batteries –/–> 5V DC Step Up —-> Arduino 5V & GND <—- Arduino Reg <—- USB
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