Arduino NANO I/O Expansion Shield V3.0

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Tell me how many volts can be supplied to the input of the shield 3.0 board (connector 5.5x2.1)?
When applying 5V, 1A to the shield 3.0 board, at the outputs of 5V or V, the voltage corresponds to 3.6 V ...
Why does this happen?
When powered by micro Usb arduino nano, the voltage at the same outputs (5V and V) corresponds to 5V...

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How many digital pins and analog pins does it add ?

jomfawad
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How much volt and amps input through barrel jack?

aniketsawant