Recent content by rlcrisp

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    MBI Core Ti - (world's thinnest??) Titanium Flashlight Pendant - (work in progress)

    Hi Guy, So I've managed to completely miss your pre-order in an absence from CPF. Any chance you will have extras of the 4.8mm? Preference would be bead blasted but I'm not particularly picky. It can be one of your anodizing experiments too =). Please let me know what you think. Thanks!
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    500 Lumen - AAA Flashlight (photos) - Work In Progress - Part 2

    Hi TGWNN, You have the right idea. I think starting with -3mV/C is a safe starting assumption. Making the measurement with respect to absolutes is where a bit of the work comes in. You can start with your method for some quick results but it is possible to get much more accurate measurements...
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    500 Lumen - AAA Flashlight (photos) - Work In Progress - Part 2

    Yes, the difficulty with most thermal measurements is in actually getting to what CREE specifies when they talk about temperature - the junction (die) temperature of the LED silicon itself. It is not possible to directly measure this temperature so you end up measuring either the lens, or the...
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    500 Lumen - AAA Flashlight (photos) - Work In Progress - Part 2

    TGWNN, To bring a bit of EE perspective into the measuring die temp of the LED.... Diodes are very commonly used on semiconductors (such as intel CPU) to measure temperature. This is because they have a very predictable thermal temperature coefficient on their forward voltage. If you feed a...
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    MBI Core Ti - (world's thinnest??) Titanium Flashlight Pendant - (work in progress)

    Been a while since I checked up on everything and/or posted but things look like they're going great! Can't wait for production. I take it you went with a magnetic retention between the two halves. Yay for hall effect =) Now you can sell them as a bundle!
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    500 Lumen - AAA Flashlight (photos) - Work In Progress - Part 2

    And... I'm pretty sure that's when you can call yourself a successful designer of any product.
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    MBI Core Ti - (world's thinnest??) Titanium Flashlight Pendant - (work in progress)

    I'm glad I am not the only one who immediately thought of this when neodymium magnets were mentioned =). Be sure to add "Users of ICDs and other electromagnetic sensitive devices" (Implantable cardioverter defibrillator) in addition to pacemaker, to cover all your bases.
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    500 Lumen - AAA Flashlight (photos) - Work In Progress - Part 2

    Hi Guy, In the spirit of piling on battery questions, Would you mind giving a little insight on acceptable charge/discharge rate for your custom IMR 10250? I'm particularly interested in the acceptable charge rate (extrapolating discharge from XML output of 500 Lumen is easy enough). My own...
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    500 Lumen - AAA Flashlight (photos) - Work In Progress - Part 2

    Works fine for me.
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    500 Lumen - AAA Flashlight (photos) - Work In Progress - Part 2

    Hey tgwnn, Great update! I particularly liked the beam/size comparisons and the "secret thing"! I love my itp eos a03 as a keychain light and it is incredible to see the power and versatility that you have packed into the same size! The beam looks awesome! Are there any plans to allow a...
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    500 Lumen - AAA Flashlight (photos) - Work In Progress

    Are you using a Flex PCB? Fancy! Never heard of anybody doing that for a flashlight driver. Hopefully there is a component that the cathode trace led to and you can just solder your wire directly onto that :whistle: I'd be curious to see pictures of the driver. I can very much appreciate...
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    500 Lumen - AAA Flashlight (photos) - Work In Progress

    Looking good! Congratulations on the working proto!
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    500 Lumen - AAA Flashlight (photos) - Work In Progress

    Oh you can go even smaller. Those look like "0603" sized components. Technology has gone down to "01005" sized which are just over 1/16th the area. Of course it is probably impossible even with a microscope to solder such a small component down by hand without a hot air gun - particularly...
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    500 Lumen - AAA Flashlight (photos) - Work In Progress

    Any idea on pricing/availability of the IMR 10280? I'll be going for the adjustable body so I will be able to use it regardless but I am interested in the new cells =). Everything continues to look great. Make sure to give your R&D team some praise and encouragement :).
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    500 Lumen - AAA Flashlight (photos) - Work In Progress

    As an engineer I appreciate the design of this light - huge improvements in most areas, innovation, and listening to all the input from a bunch of really picky customers. I'll definitely be in for one of these.
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