Recent content by Stuart B

fenix-store
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    Flashlights Polished vs. Coated

    Very cool thread. When I build my bike light I think this thread will be handy. Sometimes you need your light when you are stopped, anythign that helps them stay cooler with out excess heatsinking that isn't required on the move is great. Stu
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    New Fenix Digital Series! P1D and P1D CE with Cree XR-E !!

    Again not argueing, but not all current regs use PWM, some are linear (kind of active active resitors). PWM is the method used to adjust/modulate a fixed maximum voltage or current to average of a lower one, PWM applies even if you can't see the pulsing with your eyes. In my opinion there is...
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    New Fenix Digital Series! P1D and P1D CE with Cree XR-E !!

    I still disagree lol...but I won't post again after this one arguing :). There are 2 types of regulator, linear and switching. I believe this has a switching regulator that controls current like you say. Switching regulators have to use PWM of some form. With a freewheel diode and inductance and...
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    New Fenix Digital Series! P1D and P1D CE with Cree XR-E !!

    the CE looks like a nice bit of kit. I search the first 10 poages fror an answer on my next question but failed to see it. It says its not PWM but current regulated. I am assuming it does PWM though one way or another as the burn time increases noticably with lower lumens. If it was a linear...
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    LEDs conquer headlights

    I will have to get around to drilling and tapping some holes in an old cpu heatsink so I can mount everything without me having to hold it all hehe. I'll try and take some piccies back to back too once I have. I think both LEDs are good but for different reasons. The OSTAR seems to be the...
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    LEDs conquer headlights

    Cool info. Yes the OSTAR isn't the most efficient LED, Its beaten by the XR-e but Its better than K2s though. The do make a lot of light from a single unit. The multi die characteristic sems better to me for a car headlamp do to their floody nature. How many car head lights use a narrow spot...
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    The "best" light for biking in total darkness?

    The MTBR forum is good. The lights section is a little quite sometimes though. I have a Trailtech 10W HID which is bright and has held up OK. They are quite good value too compared to other HIDs. I also have the cateye double and triple shot lights. The double is only really good as a hemet...
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    Why does eevryone complain about the blue tints found in some lights?

    I find lot of LEDs look green. I find my HID I use for my bike bluer than the LED lights I have. Either way, I can see whereI am going and can ride a near day speed if I know the trail...sometimes quicker If I don't lol. I don't particularly like the yellow of incans staright after using...
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    What's a Cree worth? Fenix will answer!

    even though the xr-e is aproximately the same price as a unit the light will probaby cost more to buy (even if it costs the same to make). They wouldn't sell (m)any luxeon devices otherwise. The value of an item is more than the sum of its parts. Hopefully they won't extract the urine though...
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    Fraen Ostar Reflector Source

    Hi Does anyone know where I can get a couple of Fraen refelctors for the OSTAR? I have googled it, but nothing obvious. Cheers, Stu
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    Microfire HID vs. CREE XR-E

    I was wondering that too. I have soome XR-Es and a couple of different size aspherics on the way....I'll give it a try. Stu
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    Wolf-Eyes Boxer HID

    What's the shipping for one of these beasts cost to the UK? Stu
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    Current sensing without a sensing resistor?

    No one has mention hall effects yet. Its a common way to measure current with out breaking the wire, Not sure if that is what you are looking for though. The coding in you uP would be a lot simpler too. Just read the voltage output and scale it in your code. They need a little power to drive...
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    OSRAM OSTAR for DUMMIES

    Just ordered some Q2 bins ones :). Readily available optics is a bonus. Even though they are on the other side of the planet and I chose quick shipping they are good value compared to the OSTAR. I have entered the Vals into my spreadsheet for the Q2 (use the bnottom limits for lumens for that...
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    OSRAM OSTAR for DUMMIES

    Hi ThoseCrees certainly do look impressive. I have a pair of OSTARs on their way, I got them in the recent group buy on here. To drive them they will most likely need a boost type driver. This is because they need 20 odd volts to drive them and most batteries are less than this. I intend to...
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