Re: NiteCore SR3 (1xCR123A/RCR) Review + 18650 Extension: RUNTIMES, BEAMSHOTS, & More
I have recently bought two SR3 in my quest for ring-controlled lights.
It is, by far, the most solid built light I have. It throws well, for a light of its size, and it feel very substatial in the hand.
Other than the unusual look of the SR3, the fact that the cigar grip is part of the tailcap may be considered questionable. Anyway, I like the 8 levels of brightness, and I am not bothered from the ease the strobe can be unvoluntarily engaged.
My complaint with Nitecore is about the selector ring.
I was expecting the SR3 to use eight Hall magnetic sensors and one magnet, like ALL the rest of the ring controlled lights on the market to date.
I found out... the SR3 uses three Hall sensors and eight (or more) magnets. They compose the numbers from 0 to 7 with bynary code, using eight bynary values (the magnets) upon three bits (represented from the three Hall sensors).
An Hall sensor cost one dollar, one magnet cost one cent. With a little complication in the design, they saved maybe 5 dollars on the production costs. In our market system, 5 dollars of savings at the production level are from 25 to 50 dollars less from the final customer price. Everything is still looking fine, so far.
What happen during the transitioning of the control ring?
The control circuit has undefined transition states. WHile increasing or decreasing the brightness, expecially around the middle level, the brightness of the led changes randomly, because of the binary input control.
Nitecore should have used eight sensors (or at least have inserted a delay in the transition between the levels) in my opinion, so this behavior, due to the intrinsic design, could have been avoided in such an expensive light.
While it is not a blatant defect, it is something that goes against the user fair expectations. I have used expensive Hi-Fi power amplifiers, with volume adjustment made with discrete steps, and the volume, between one level and the next, was increasing or decreasing "as expected" during the transition of the control knob, not going random - and finally setting at the detent - like the SR3 does.
Aside from this unexpected design "feature", which I consider a flaw, I am very satisfied with this light.
Regards
Anthony