I wanted to ask, is it possible that one particular component has failed on my board, or the complete baord is toast?
Consider this scenario : I have a transistor with Vcc of 12V. I want to control this from my arduino. Is there any safer method than a jumper from arduino output to the base of the transistor (via a resistor ofcourse)?
Does the duemilanove have protection agaisnt reverse Vin polarity? This says that reverse Vin will kill the microcontroller.
However I once connected 9V DC jack in reverse polarity and the board survived it.
I just want to know if they have included protection against reverse voltage on Vin so next time I will check the jack before plugging it in.