The IDE has absolutely no effect on power, so behavior changes when it is running is coincidental.
So it seems sometimes i have to reset to make it work and I wonder why
The power led is on when it doesn't work.
sending MIDI data to my synths, if I open the IDE they go crazy,
My model is one of the first UNOs i think, it's from 2010
QuoteSo it seems sometimes i have to reset to make it work and I wonder whyYes it sounds like that reset problem especially as you said:-QuoteThe power led is on when it doesn't work.So it is getting power but not running.Quotesending MIDI data to my synths, if I open the IDE they go crazy, That is because you are using the same pins for the USB serial connections as you are for the MIDI I/O so your MIDI equipment is getting all sorts of rubbish.QuoteMy model is one of the first UNOs i think, it's from 2010I think that is before they started fitting the diode.
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