Recent content by HDS_Systems

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    HDS closing doors after catching case of Corona

    I caught a case of Corona and gave it to Hogo. Hogo went home and will self quarantine until it is gone - he did not want to share it with anyone else. :sick2: April Fools… :crackup: It was too cold...
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    HDS Systems EDC # 19

    Hogo was true to his word and browbeat me mercilessly. In self defense, I browbeat him back - I told him to either put up or shut up - fix the problem so it will go away and never come back. He agreed. We spent some long hours figuring out the details and putting together a plan of action...
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    SHOT Show 2018 Get Together

    StuGatz, Dan and I can probably stop by after dinner. Something informal and relatively quiet would be nice. You know who we are. If you are trying to contact me at the show, use the company phone number - I don't have e-mail, text or other such technology at the show. You can call me old...
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    SHOT Show 2018 with mehh POLL

    Re: SHOT Show 2018 with fun POLL StuGatz, Dan and I will be there manning booth 20137 - in the big law enforcement hall on the second floor. Stop by. Henry.
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    HDS Systems EDC # 19

    Allow me to explain why integrating spheres are way more problematic then you understand... First, it is important to understand that the definition of a lumen includes a very specific spectral response. The spectral response corresponds to the sensitivity curve of the human eye - or at least...
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    SHOT Show 2017

    I will be there - booth 20137. Although the show does not start until Tuesday, I set up on Monday morning and then there is a vender (supplier) show upstairs for the exhibitors and an NSSF get-together that evening. Other show nights are currently open. If someone organizes a get-together...
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    HDS Systems EDC # 18

    Hank_612, Unfortunately, R&D - followed by testing - does not always go according to plan. When I responded, I did not know of any issues. However, continued testing uncovered additional issues and I will not ship something I know is broken. Sorry. You can read a more detailed post in the...
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    When did you order your HDS?

    Re: HDS Systems EDC # 18 All, Research and development do not always go as planned. To quote an old saying: Life is what happens while you are planning your future. The old rotary design has worked well for years. It has proven very reliable and very durable. Our biggest problem was it was...
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    SHOT Show 2016

    HDS Systems and crew will be there. We have a new booth location - 20137 - which is located in the big hall between the main hallway and the main exhibit area on the second floor. I plan on wearing a headlamp this year. :-) Henry.
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    Who made the FIRST Led flashlight?

    More_Vampires, HDS Systems designed, built and sold the first regulated high power white LED flashlight - the Action Light. It used 24 white 5mm LEDs to generate about 12 lumens on the High setting and was powered by a step-up regulator, which was powered by a D-cell lithium-sulfur dioxide...
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    HDS Systems EDC # 18

    RecDNA, I am not sure where the 1A figure came from. We drive by power - not current. As a result, a white LED will rarely - if ever - be driven to 1A. In general, only low voltage LEDs (e.g., red and IR) will see such high currents - because P = I * V. If you keep power constant and lower...
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    18350 vs 18500 batteries - size vs utility - the poll

    Poll: Which battery size would you prefer given the specified assumptions? A) 18350 given: 1) same overall external flashlight dimensions as a regular 123 model, 2) 45% increase in tactical runtime (79 vs 55 minutes on high setting) using IMR 18350 rated at 800mAh compared to IMR 123...
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    How do you justify buying expensive flashlights?

    My addiction to lights - and spending a lot of money on them - started decades ago, back when a good American made brass carbide lamp was “only” $10. Back when incandescent flashlights - as unreliable as they have always been - were the only electric show in town. I value light so highly that...
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    HDS Systems EDC # 18

    RobertM, None published. But now that several other projects have been completed, the headlamp project is returning to active status. We are working on the modeling of the body as the physical layout impacts so many features - from assembly to usability to maintainability. I have used a lot...
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    HDS Systems EDC # 18

    Andy, We only recommend one rechargeable battery brand and that brand is AW. They have been tested and approved. We have years of experience with them and they have a long history of quality. It is not clear to me why one brand of batteries can be shipped easily and another brand cannot be...
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