Recent content by ssanasisredna

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  1. S

    AND THE OFFICIAL THREAD KILLER IS .....

    There are infinitely better places to discuss photography. Incans are an obsolete technology that has no path for advancement really. Headlamps ... I buy one every few years. "Don't be negative" doesn't fix anything. A positive attitude without a willingness to change and adapt does not...
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    AND THE OFFICIAL THREAD KILLER IS .....

    All I can say is that the thread-killer is Empath as the closing of that other thread pretty much took away any remaining desire I had to post anything here ... which was pretty limited already. It seems the appropriate response when we hear something we don't like is to go la-la-la-la .... oh...
  3. S

    Where did all the oldtimers go.

    I wonder how many have checked and seen that this thread started in 2005 :-)
  4. S

    Very Few New Posts?

    When someone moves your cheese, you can pretend they didn't, but it does not change the fact they have. Lead, follow, or get out of the way. I will see your link and raise you ..... https://www.penguinrandomhouse.com/books/72469/only-the-paranoid-survive-by-andrew-grove/9780385483827/...
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    Very Few New Posts?

    The "hobby" has been dying a slow death for many years. For me, it peaked in about 2008-2012 (at the latest). Since then, LED improvements have been incremental. I used to own a ton of flashlights, now I can find 3 or 4. It's enough. If you own 5 variants of the same thing, then you are...
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    Non-dimmable LED bulbs are dimmable

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  7. S

    Life expectancy of Lithium Ion camera battery (mine is 12 years old)

    If the batteries are stored in a somewhat low state of charge and are only cycled infrequently, then they can last a long time. Temperature is a factor, but state of charge for storage is a huge factor and number of cycles. Generally we don't cycle camera batteries that much unless we are pros...
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    LED 4ft Tubes Flickering

    Did you buy cheap, or did you go with good name brand? This is not a matter of LEDs responding faster than fluorescent tubes, either responds more than fast enough to see a supply "glitch". It is mainly a matter of cheap power supply design in the tubes. Almost all fluorescent ballasts are...
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    Non-dimmable LED bulbs are dimmable

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  10. S

    Non-dimmable LED bulbs are dimmable

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  11. S

    Non-dimmable LED bulbs are dimmable

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  12. S

    The basics of LED drivers

    Re: The basics of LED drivers - Frequency and Voltage What you see sold is going to depend on where you live. If you live in North America, you will see a lot of drivers advertised as 120-277 or a wider 100-277. 100 is used in Japan, 277 is industrial/commercial in the United States. If you...
  13. S

    LED Circuit Help

    As noted, no resistor, but you are hooking it up wrong. Note the standard application circuit in the data sheet. Vin+ to + on battery. Vin- to - on battery. Vout+ to LED+ Vout- to LED- DO NOT connect Vout- to Vin- ... as stated not to do in the data sheet. Odds are you shorted out the...
  14. S

    Who's taking over at Home Depot?

    If the CRI is 90, the tint by definition isn't "bad". To have good CRI you must be near the blackbody, which means you don't have "TINT". It's 2700K versus the 2850 of the GE Reveal. That is actually a fair difference and quite noticeable. In addition the GE Reveal is a modified spectrum that...
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    How would you design LED headlights for a riding mower?

    My advice to her is to stick to her specialty and evaluate what is acceptable from a design aesthetic and manufacturing cost standpoint, as well as the most ideal lighting pattern possible within a given lumen budget, and then suggest hiring of an optical engineer to design the appropriate...
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