I'm entirely new to the Arduino platform but have some limited experience with other chips. I have no problem uploading to my Uno via USB and running perfectly lovely sketches. However, when I unplug the power and plug in a battery instead, or even plug the USB back in, the Uno always reverts to the…

Arduino Uno not retaining sketch on power-off

MarkT January 20, 2011, 1:16am 2

What happens if you upload a sketch, run it, then hit the reset button on the Uno?

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