I have a 2 button midi controller built and it works great when the arduino is connected to the host computer from which I drew the sketch from. As soon as I connect power from anywhere else other than my laptop I cannot get anything to work or a get some much signal interference through the the mid…

Arduino not working when given alternate power.

Wawa November 10, 2017, 3:07am 4

Seems to be a continuation of this post.
Leo..

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