4/16/2024 0 Comments Arduino mega 2560 pinout chip nameThis is not recommended because you bypass the LD1117S50CTR 5V voltage regulator and have to make sure that the voltage level is stable. You can also power power the Arduino microcontroller from the 5V pin. You cannot power the board with the barrel jack and VIN GPIO at the same time, because there is a polarity protection diode, connecting between the positive of the barrel jack to the VIN pin, rated at 1A. Therefore you are able to power the Uno with an external 9 Volt battery. The voltage has to be between 7V and 12V.
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