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DrJones

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  • good quality

    posted byDrJones on 04/08/2016

    Back focal length 15mm, effective focal length about 20mm (due to thickness) Pro: These have a quite good optical quality, i.e. quite low spherical aberrations, for a plastic lens of this price. I'm actually quite impressed. Con: Quite thick, be a... Read more

    Impression: good optical quality;

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  • Great linear driver for single Li-ion flashlight

    posted byDrJones on 05/02/2012

    Great driver for XM-L, really regulated. Suitable for 1*Li-ion (e.g. 18650) - or multiple Li-ion cells in parallel. Configurable modes: solder a solder bridge between one of the stars to the border to change mode config: default: L/M/H/strobe/sos... Read more

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  • Nice for own projects

    posted byDrJones on 03/04/2012

    Nice module with a nice LED driver. Comes with an ATmega8 just waiting to be programmed by you. Includes an ISP header. There are spots on the board to add several components like a temperature sensor or a battery buffered real time clock. Three a... Read more

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  • Great thrower

    posted byDrJones on 11/19/2011

    This is a great thrower. It's big reflector and good driver give it great throw. And it's total light output is higher than that of most XM-L light I have (and I have quite some). Spot intensity: 52kcd; Throw: 460m (NEMA) Can tailstand, has a Has... Read more

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  • 18650 fits

    posted byDrJones on 09/21/2011

    As the others say, it's big. The biggest pro for me is: It has a perfect size to hold an 18650 Li-ion battery and it's water tight. If you are on an outdoor tour, this might be a good container for your spare battery. A TrustFire Flame 18650 fits... Read more

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  • Reasonable compact XM-L light

    posted byDrJones on 06/14/2011

    Mine came with a regulated 1.4A linear driver and thus draws about 5W (XM-L is specified up to 10W) - that's a good thing though, since a P60 drop-in light clearly isn't suited for more, so this is a reasonable choice and less prone for thermal is... Read more

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  • 320mAh - nice!

    posted byDrJones on 05/30/2010

    These batteries have ~325mAh, measured at a discharge current of 300mA (~1C), and perform equally well at even higher currents (~320mAh @ 700mA/~2C). So these are the best 10440s I know of. Protected 10440s in general are a bit bigger than the not... Read more

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  • Good buck driver

    posted byDrJones on 04/18/2010

    It is a good buck driver. Whenever you want to drive one LED with two or more cells (or some other voltage source up to 18V) and no modes, this one is for you. Efficiency is ~80%; Drives the LED at 1.2A. Might even drive multiple LEDs in series (I... Read more

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  • small

    posted byDrJones on 12/30/2009

    good brightness for the size small and lightweight small enough to hold in your mouth for a while (well, sometimes one needs that...:) low price (check bulk rates, too!) Compared to the Trustfire XP-EF23 (SKU 24291) it's lower quality, much 1-mode... Read more

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  • I like it.

    posted byDrJones on 12/29/2009

    It's compact. It's bright, mine has 43mW output on a fresh battery. The two gratings (one turnable) produce a nice pattern. Gratings are removable. Comes in a nice case. Cheap. Battery drains fast. Mine could have been a bit better collimated (but... Read more

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