Arduino and multiple power sources – things to watch out for…

This is part of the TechEd section. As I mentioned previously , I had a need to double check that the 5v USB supply from my laptop was floating with respect to my lab power supply. I measured a no load difference on the 0v lines of around 120v – which raised the obvious concern Read more about Arduino and multiple power sources – things to watch out for…[…]

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