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Following the guidance on this post I have enabled the 5V pin. That same post suggests that I control that pin with D12, though I find it weird since there is already a D12 pin. When I try and run some code the D12 pin is performing exactly as I expect, but the 5V pin is doing nothing.

Looking through the tech specs it says "the 5V pin does NOT supply voltage but is rather connected, through a jumper, to the USB power input." which I find odd, since if its connected to the power input, should it not be supplying voltage?

Could someone clarify if its possible to use the 5V pin like a digital pin, and if so how?

1 Answer 1

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Following the guidance on this post I have enabled the 5V pin. That same post suggests that I control that pin with D12, though I find it weird since there is already a D12 pin. When I try and run some code the D12 pin is performing exactly as I expect, but the 5V pin is doing nothing.

5 V pin is the the 12th pin of the PCB

Looking through the tech specs it says "the 5V pin does NOT supply voltage but is rather connected, through a jumper, to the USB power input." which I find odd, since if its connected to the power input, should it not be supplying voltage?

it says that the 5V pin is connected to the USB power input through a jumper and the jumper is not connected from factory

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  • the 5V pin does NOT supply voltage but is rather connected, through a jumper, to the USB power input could mean that the pin is not a power input for the arduino
    – jsotola
    Commented Sep 27, 2022 at 18:27
  • @jsotola it can be both because it is connected to USB power input and to the 5 V to 3.3 V regulator which powers the rest of the board. but the pads are not connected to prevent using the 5 V pin without a solder bridge. content.arduino.cc/assets/NANO33BLE_V4.0_sch.pdf
    – Juraj
    Commented Sep 27, 2022 at 19:09
  • Thank you for the clarification, but it does not answer the question. Is it possible to use the 5V pin like a digital pin? If so, how?
    – Pablo
    Commented Sep 28, 2022 at 12:43
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    @Pablo, the pin is just on a 5 V rail of the board. there is no logic, just 5 V power.
    – Juraj
    Commented Sep 28, 2022 at 12:58

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