i have arduino nano and mini.
buth has 5v and 3.3v.
mean? are they works on both voltages?
but for programming, i will use usb, which delivers it 5v that is the problem.
say, after programming, i removed the usb wire, and give it 3.3 v , then would it work?will all pin tx/rx/gpio will reach max. 3.3 voltage when they are high?
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can i do like,
make the usb pins out, and convert 5v to 3.3v and then supply it on where 3.3v is marked on board and all other pins are as usual?
does other pins of usb also reaches to 5v?