![]() Voltage Regulator – The main work of the Voltage Regulator is to regulate the input and output voltage of the Arduino MEGA board.A properly configured shield can read the IOREF pin voltage and select the appropriate power source or enable voltage translators on the outputs to work with the 5V or 3.3V. IOREF – This pin on the Arduino/Genuino board provides the voltage reference with which the microcontroller operates.The maximum current draw from this pin is 50 mA. 3V3 – This pin outputs a regulated 3.3 volt supply generated by the onboard regulator.Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. ![]()
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