I am working on a home automation project in which I have a Mega (2560) and a Yun. I am powering the Mega USB input from a Kara Mobile regulated switching 5v supply with a hacked USB cable (+/- 5v only - no data). I saw no discussion about the USB shield so I also connected the hacked USB cable conn…

Problem powering two Arduinos, a Yun and a Mega

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