I think most people prefer not to burn themselves so 55-60C is probably sensible. A bit of testing last night showed that is seems to stabilise at around 25% after a few minutes on either 35 or 100% mode, so seems to be OK for my night photography use (as by the time I’ve gone back to my camera and focussed, set exposure, the output should be stable).
It is marketed for red leds, totally looking like a buck driver. ∅17mm. Two A19T MOSFETs behind, these must be for reverse polarity protection. The sense resistor stage is gross, with 0.1Ω combined, dropping 0.25V at maximum driving current; this is its only fault, reducing efficiency.
There is no reason for it not to work with any other 1S emitter.
Also there are likely many customers buying lights from Simon that don’t know how hot a li-ion powered flashlight can get, especially when left unattended. I’ve seen several people on r/flashlight that wrecked their older S2s by leaving them on higher output for ceiling bounce, etc. Sofirn for example ran into a similar problem when they were getting bad reviews on lights simply because they were getting warm on turbo. I can’t imagine the consequences reaction if these lights were sold without any sort of thermal regulation or even just timed stepdown.
Looking good.
For the 2.5V red light.
Did you have to solder the driver to the pill? Retaining ring?
Earlier in this thread Simon said the red driver wouldn’t be suitable for the S2+ pill.
I did solder a 8x driver to a brass pill for a S2 mod once, and it was a total mess :
As the pill takes all the heat, the solder won’t stick to it, I finally succeeded using open flame soldering, getting the whole pill enough heat that it could melt solder by contact … worked fine but the result is not pretty
Perhaps opportunistic, but do AliExpress coupons stack with discounts that Simon may give? I’ve got a project I’m working on, and am trying to do it in the most cost efficient way I can.
Yeah, not so nice but it’s working