I have an ATMEGA2560 Arduino board which is sinking 75 mA. It seems to me it's unreasonably high.
I check ed the datasheet of ATMEGA2560 micro and it shows a 20mA at 16MHZ clock. There's in addition the bootloader serial microcontroller which I assume to be sinking other 20mA.
There's still 35 mA missing... where do they go ?
The Arduino is not mounted in any board (which may be sinking) I have it in my hand with just the power supply. External supply at 16V.
Unused outputs (all of them) at ground.
Can someone help me ? I 'm pretty new at using Arduino, so I may be missing something big. Bear with me.
Greetings from Italy.