![]() Is it just because you could get the polarity and voltage wrong and wreck your arduino or is there something else to be concerned about? If it's the later, should I create a USB B cable with 5V coming from my power supply? I'm a bit concerned that it's not advisable to supply power to the 5V pin. Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. ![]() The board can be supplied with power either from the DC power jack (7 - 12V), the USB connector (5V), or the VIN pin of the board (7-12V). I read that:ĥV.This pin outputs a regulated 5V from the regulator on the board. I've got a 10A V5 power supply that's primarily there to power a bunch of LEDs but I wanted to also use it to power an arduino mega 2560. Firstly, apologies for these basic questions.
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