Almost from very beginning when I started working on Xronos clock I had in mind to implement AutoDimming functionality. Concept is simple and used in smartphones, tablets, etc. In the dark room LEDs become dim, so it don’t bother you when you sleeping. In sunny conditions they become bright so it’s easier to see. Nothing new here 🙂 However it proved to be biggest challenge for me. Only about a week ago I discovered root cause of the issue and found solution.