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    Does Anyone Still Use Incandescent?

    I'm a caver, so my primary go-to light is used underground where I like a bright headlamp for both throw (so I can see all the pretties on the high ceilings and far walls, or the exit tunnel at the end of a huge room) and enough spill to let me glance down and see where I'm walking without...
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    Does Anyone Still Use Incandescent?

    [ QUOTE ] Since finding the Dorcy Cool Blue almost three years ago ... [/ QUOTE ] Can that puppy be found at any national chain stores? Ever since seeing some favorable reviews and beam shots, I've wanted one, but can't find any Dorcy products (except the nice little 1AAA) in Walmart.
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    Rayovac Sportsman 3-In-1 Headlamp Mod

    Two reasons: 1) In my (admittedly limited) testing, increasing the current didn't improve the throw, which was what I was wanting to improve. I don't recall it improving the brightness very much, either, but then I wasn't paying a lot of attention to brightness. 2) I don't know the maximum...
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    1W Luxeon modded into Dorcy 1AAA

    [ QUOTE ] Doug S said: [ QUOTE ] Ben H said: Doug, Any plans on selling these mods? [/ QUOTE ] Considering that I am a ham-fisted, slow moving modder, I don't have any plans to do mods specifically with intent to sell. I must report that several Dorcies were harmed getting the first one...
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    HELP : Single Transistor Constant Current Driver

    If it isn't too late for suggestions, I modified a two-transistor current mirror circuit to work as a constant current source. It is currently designed to drive three 3.7V LEDs from a 5.25 - 4.5V source at 20mA each, but you can probably modify it to handle your 9V source. You can find it on...
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    Rayovac 3 in 1 headlamp mod (simple one for the newbies)

    This looks like a good mod to try, since I own 4 of these Rayovac headlamps. But the minimum order quantity for the LXHL-FW1C at Future Electronics is 48 at $14.40 each, and I can't afford $691.20, nor would I need 48 of these buggers even if I could afford it. Anywhere else one can get these...
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    Rayovac 3 in 1 headlamp mod (simple one for the newbies)

    <font size="2" face="Verdana, Arial">Chris, Did you find out the single quantity pricing for the FW1C?
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    Click switch? Rotate Head? What do you prefer?

    The only twist-on I have is the Coleman Peak 1 Expedition I just bought. I do not like the twist-on at all, as it twists much too easily, causing it to switch off or change its focus with almost any vibration. And since I use mine on caving helmets, I'm vibrating it (to put it mildly...) every...
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    Rayovac Sportsman 3-In-1 Headlamp Mod

    I've created a web page to show my first mod: a Rayovac Sportsman 3-In-1 headlamp, modified by replacing the original LEDs (two red, one white) with three Nichia LEDs that all burn at the same time, rather then just one or two). Bonus: this mod includes a small, cheap and simple (only 4...
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    Krypton Bulb Replacements

    Thanks, David. It looks like Petzl's 6V halogen will work. That price though... $7... ouch! Do you know what the bulb life is? Charles, I've been eyeing the Petzl Zoom Zorabelt. It's about $29 now. If it was only me, I could afford it. But I've got to equip me, my wife and two children...
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    Krypton Bulb Replacements

    I have a Rayovac headlite with a Krypton K4SB-2 bulb, but as dim as this bulb is, I find it hard to believe its a krypton. Is there a brighter screw-in type bulb I can replace this with? I need long bulb life, since I use these for caving, so overdriving is not an option for me. Or better...
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    Those with Ravovac Sportsman, try This!

    Interesting. Rayovac obviously gives the same name to several of its products. Like I said, I have three headlamps, the package says "Rayovac Sportsman 4AA Head-Lite." It says the replacement bulb is a Rayovac Krypton K4SB-2, but as dim as this bulb is, I find it hard to believe its a...
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    Those with Ravovac Sportsman, try This!

    I've bought three of these Rayovac Sportsman 4AA headlamps, and they all have screw-in Krypton K4SB bulbs that don't seem as bright as other 6V lamps I have. Is the K103 a screw-in bulb? Can this lamp be modified to accept non-screw-in bulbs?
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    Led current regulation, have questions, need suggestions

    Paul, Part of my recent Rayovac Sportsman 3-in-1 modification included the addition of a simple constant current circuit that uses two NPN transistors and two 1/4 watt resistors to keep about 20mA through the three Nichia white LEDs. I'll bet it would be trivial to modify the circuit to drive...

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