[quote=ToyKeeper]
Out of curiosity, what happens if you do this?
- Loosen the battery tube at least a full turn or two.
- Tighten the tailcap as far as it’ll go.
- Tighten the battery tube./quote]
Not addressing the root cause, which has been discussed for a long long time and fixed long ago. But ignored by the usual suspects.
It’s not even something that you can fix in firmware.
Not surprised DEL has been offline for ages, it is getting rather boring around here as far as
hardware development is concerned . I.e. zilch.
There are only so many ways to connect e.g. some 7135s and a FET, with an MCU. Perhaps with some flashy extra lighting in the head, rather than the tail.
Led4Power being the honourable exception, please support him.
But still, useful advice for those suffering. It might help. This is the difficulty with “direct drive” i.e. just crowbarring a FET between the cell and the LED, with all the losses in between. Then let your cell transfer characteristic, state of charge, LED transfer characteristic, metalwork rubbishness, switch resistance, driver FET choice and adequacy of wiring and MCPCB thermal path, optical wonderfulness, and on, and on, deliver an outcome, for, maybe, 30 seconds or a minute, whilst you measure it, ready for the big reveal.
Personally I prefer more practical things that run for many hours at useful light levels efficiently, at sensible cost.
The more elegant the better. Style, ergonomics, materials and UI are important.
But maybe I’m in the wrong forum…