![]() 5V. This pin outputs a regulated 5V from the regulator on the board. ![]() You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin. VIN. The input voltage to the Arduino board when it's using an external power source (as opposed to 5 volts from the USB connection or other regulated power source).If using more than 12V, the voltage regulator may overheat and damage the board. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may be unstable. The board can operate on an external supply of 6 to 20 volts. ![]() Leads from a battery can be inserted in the Gnd and Vin pin headers of the POWER connector. The adapter can be connected by plugging a 2.1mm center-positive plug into the board's power jack. The power source is selected automatically.Įxternal (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or battery. The Arduino Mega can be powered via the USB connection or with an external power supply. Pin Mapping: PinMap2560 page Summary Microcontroller Schematic: arduino-mega2560_R3-schematic.pdf Schematic, Reference Design & Pin MappingĮAGLE files: arduino-mega2560_R3-reference-design.zip The second one is a not connected pin, that is reserved for future purposes. In future, shields will be compatible both with the board that use the AVR, which operate with 5V and with the Arduino Due that operate with 3.3V.
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