Yeah mine has that pitch thing too. My Sofirn SC31 Pro has it as well but the TS21 is louder. I’d like to point out though that it’s also possible that the ceramic capacitors (of which there are quite a lot according to a TS21 teardown), with their big internal surface area can act as loudspeakers. Just a quick “the more you know” fact haha. But the coil (maybe in conjunction with the capacitors) and the high switching frequency (but in the audible range) can cause it too
Mine does not whine on turbo because the circuitry doesn’t switch. AFAIK in that case it’s just the battery through some mosfets straight to the LED. On higher “regulated” outputs I can hear it, and it gets louder the higher the light output is.
That’s why I was asking,
I had experienced it with another light when on turbo
Just wanted to make sure their issue wasn’t the actually normal.
Btw. My red ts21 so far seems fine. No noises, I have the aux is turned off and the switch light increases brightness with ramp level while in use like it should according to the instructions
That's kind of like complaining to the doc "my arm hurts when I move it", and the doc saying "then don't move it".
I do like having a switch LED and is certainly one of the reasons I bought this light, but at least we have this option to turn it OFF as a work-around solution.
D4V2 here: https://1lumen.com/review/emisar-d4v2/ where all the colors are measured. The OFF # is right where it should be at 25 μA (20-30 is expected), while the green and blue are somewhat reasonable in HIGH, and the low #'s are all reasonable. I'm not sure how many LED's but I believe it's 4 per color.
I would have purchased a FC11 in each color if it had Anduril 1 or 2.
It’s not that the current UI is bad. Anduril just helps keep more of my lights with a common UI.
I haven’t ordered one myself, and won’t, until the bugs (or the known ones anyway) are worked out.
So my opinion is based on the similar light setup in the SP32A, and SP35, which is fine as a brief indicator, but not going to be nearly as satisfying as the larger switches if one wishes to leave them illuminated all the time, despite the current drain.
A soup ladle can still dig a hole, but you really want a shovel for that.
TS21 anduril 2 with orange indicator , and blue indicator will show when Sudden voltage change, such as turbo and strobe (turn off auto 30 seconds later), so when turbo the purple will show because of orange and blue mixed