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Very nice Up-cycling and beautiful fixture you have made there. A lot of skills have been put into this.
This mod would be great for many applications, Thanks for sharing!
Hi BDG, I agree with your comment, but for your answer:if you look at the sketch for arduino, the loop function has no conditions about the button press, it is simply an infinite loop of writing value.the interupt [interupts and infinite loop] providing a new value to be set on the LED. Hope it clears a few things up.