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Posts: 5,028 | Thanked: 8,613 times | Joined on Mar 2011
#27
Originally Posted by Copernicus View Post
Whoa, second mode? I don't remember a second mode... Hmm, sounds interesting!

Yeah, looking again at the ADP1653 data sheet, it only seems to support integer values between 1 and 11 for "torch mode" usage, 1 representing the low value of 50 mA and 11 being the high of 200 mA.

(...)

So only the low value of 50 mA is supported. I'm still not seeing any way to go lower than 50 mA here...
Ah, bummer, so lower than 50 mA isn't possible :/ Sorry, I screwed it in memory with the flash (strobo) mode (the thing I called 2nd mode), which is used for much more powerful, but blinking, outputs. I stand corrected.

As a side, note, it's good news for Selene - apart from regular torch light intesity that she/he knows (which is quite weak, but barely usable for her/his purposes), she/he can also use a up 4x more powerful current for driving leds, which roughly correspond to 4x more powerful sunrise emulation! As far as she/he isn't afraid of frying own LEDs, of course.

Originally Posted by pichlo View Post
What is the fastest the LED can flash in the strobe mode? If fast enough (say 25 times per second or more), then lower values could be achieved by varying the duty cycle.

(...)

If I get it right, timing is in multiples of ~54ms, totally unsuitable for emulating steady light with very fast strobing
Indeed unsuitable for sun emulation I think, but quite useful for very bright flashlight (if one can get used to still-visible, little strobing). I have been using, without incidents, a rip-off Lanterne code, that - in torch mode - strobed LEDs with absolute max power on maximum duty cycle (lowest interval between strobes) - for so long time, that I actually forget its custom, and yesterday overwritten it with new version from "mainstream", resulting in me needing to rip it off, again

Anyway, the point is that I was using the "unsafe" mode for many months, with torch enable for long periods of time - 30 minites, hour, two hours (was too lazy to remove timelimit, so I just re-enabled it when hit the clock), etc. while working. As said, no adverse effects, except for LEDs getting *a little* more warm, when active for a long time.

/Estel
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Last edited by Estel; 2014-04-08 at 11:54.
 

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