I prefer the term used in the music synthesizer industry… GAS.
Gear Acquisition Syndrome
It works especially well for flashlights… because if someone posts a review and makes you question how you ever lived without it, they’re GASlighting you.
Is it mainly the upgrade and rewrite for the Tiny1634 which is a huge change?
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Mostly the tiny1634, since so many projects were running into limitations with the tiny85. But there’s also other stuff I can’t talk about yet. And more generally, he has been pushing the development of many aspects of lights, like in the list a few comments ago.
The SST-20’s are a less efficient than the XP-L’s, although only significantly less at higher currents, but because of their lower voltage, and the D4 being a direct drive flashlight in the highest mode, they make up for that with a higher current/wattage and end up with the same output as the XP-L Hi, at the cost of warming up considerably faster.
Hmm… My guess is optical reprogramming is a GO on this model. I seem to recall something about running out of pins on the ATTiny85 being at least part of the obstacle to that… Other than that, I’m unsure and very curious