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  1. N

    Summer camp 1xAA LED

    I am looking to buy a set of cheapish LED flashlights for my friends' children to use at summer camp. I am wondering if the Ultrafire C3 (Cree) would be an appropriate choice, as it is touted to run on everything from NIMH to LIion? My expectation is that the kids will be sent off with a...
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    More efficient DC/DC conversion? New TI chip.

    I may have missed it, but I'm sort of suprised I haven't seen this posted earlier. Apparently, TI has released, or will release a new DC/DC converter IC with unprecedented efficiency. The chip designation is "TPS61200". There is a post on www.theregister.co.uk that discusses the...
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    Positive LED slug epoxy trick

    It seems that a number of people doing upgrades and mods have been bitten by the fact that the SSC (Seoul Semi-Conductor) emitters have a positive slug much like the red and R/O (Red Orange) luxeon emitters and stars. I have seen advice in the forums to cure a thin layer of Arctic Alumina...
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    Nuwai Q-III observable flicker?

    I am in receipt of two Nuwai Q-III lights and I am not sure that I can believe my eyes. I think I am seeing a high speed flicker from the boost converter. This is not necessarily bad. If I wave the beam across a wall I can make out dark bands indicating that that the LED is being pulsed. It...

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