So I was wondering, if I put an external 5V to the 5V pin on the mega 2560, would the 3.3V pin still work?
I can see only 1 voltage regulator on it...
I'm also curious about the Arduino Due, same question as above but also: It is stated that the DC current is the same for both pins, how is that if I only see one regulator...? Furthermore, if the board will be supplied 3.3V to the 3.3V will the board work or the 5V is actually being used even though the chip operates at 3.3V natively...