Hello, ignorant question. I'm building a project that is powered by a battery and I wanted to minimize the current consumption as much as possible.
My configuration used to be like a 16v battery goes to a buck converter down to 3.8v (this is the lowest voltage I can supply the Arduino Nano without shutting down), to the Vin pin.
But I thought about moving the 3.8v to the 5v pin instead and it's running OK. I mean the Nano is working fine and doing its job without problems.
Is it ok to keep the wiring setup this way? Running a voltage lower than 5v to the 5v pin?
The reason I moved the supply from the Vin to the 5v pin is because I wanted to monitor the voltage drop of the battery source. And if I connect the supply to the Vin pin, I get incorrect voltage readings.