Hi guys, My sketch has 2 different modes of run: When Arduino is powered by external source using Vin PIN do something When is connected by USB power do something else. The issue is how to understand which power source is actually connected. Reading this schematic : http://arduino.cc/en/uploads…

check the power source

system May 25, 2012, 11:09am 5

Hi guys!

Finally I can assure that It works!

But the pull-down resistor values must be 5,6Kohm

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