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I have an Arduino Uno. It has a 3.3v pin that I would like to use to power another module that requires 3.3v, and nothing more. If I power my Arduino Uno with a 9 volt battery, will this pin output 3.3v, or will it give more than that?
The 3.3v is regulated and will always output 3.3v if the device is powered on.
Required, but never shown