Arduino NANO external power

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1

Dear community,

somewhere over this forum I found that VIN pin is for +6~20V external power and 5V pin is for regulated +5V external power. Ok, I have regulated +5V for my Arduino but sometimes I will connect it via USB. Will be the dual power supply problem for Arduino?

Thank you.

2

The Nano's safe input voltage is 7-12V, not 6-20; check tech specs for arduino nano.

5V on the 5V pin in combination with 5V from USB should be safe; there is a protection diode that 'selects' either the 5V input or the USB power.