Arduino nano power supply

Using Arduino General Electronics
1

Hello, I have an Arduino nano 33 IoT and I want to make a standalone application (no connection with PC). I am a bit confused with the proper way to power supply the arduino board. In the documentation it refers that I should not supply to the VIN pin 3.3V, but something like 5V.

So, I will supply 5V to the VIN pin, and afterwards I will supply the rest of the components either from the 3.3V or 5v Arduino output? This seems a bit strange to me, considering that I am exposing the board to possible overcurrents.

Could you please help me with that question?

Thanks in advance.

2

You will use the Arduino for control signals to and from the peripheral devices, and a common ground. You will use the external power supply to distribute power to the peripheral devices and the Arduino.

3

I moved your topic to an appropriate forum category @koel7.

In the future, please take some time to pick the forum category that best suits the subject of your topic. There is an "About the _____ category" topic at the top of each category that explains its purpose.

This is an important part of responsible forum usage, as explained in the "How to get the best out of this forum" guide. The guide contains a lot of other useful information. Please read it.

Thanks in advance for your cooperation.

4

The Nano 33 IOT has an onboard DC-DC converter.
Yes, it should be powered from its VIN terminal.
You haven't said what all you want to run from that "3V" output, but it's 'powerful'.
The "5V" terminal looks like 'VUSB', so it's only present when the USB cable is plugged in.
NANO33IoTV2.0.sch (arduino.cc)

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