I've fried two Arduinos before: one was an Uno, which I killed with too high of an input voltage, and the other was the ADK version of the Mega, which I never was able to conclusively determine what went wrong. This got me thinking: what are some things (perhaps not immediately obvious) that will damage Arduinos?
Electronic – arduino – What are the most common ways to fry an arduino?
arduinohardware
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Best Answer
Some I can think of that people have done...
ATmegachips used on most Arduino boards have an absolute max of6V.)VCC(typically 5 volts) to any of the I/O pins.40mA. (E.g. driving a motor directly or not using a current limiting resistor with a LED)GNDandGNDtoVinor5V(reversed power).Vinand Barrel jack do have a protection diode, but it isn't always enough.5Vpin while connected to USB.On the
UnoandMega2560boards, which use anATmega8u2or16u2for the USB to Serial converter, it seems like whenever someone accidentally connects12Vto an I/O pin it gets blown. I don't fully understand why, but it seems like a trend.