Recent content by videoman

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    Looking for buck 10A dc-dc driver w/dimmer

    Thanks for clearing that up. I looked at led supply and they don't have what I am looking for. Here's what I have in mind. I am powering a light enclosure 12 X 5 X 4 inches ( large heat sink, kind of ) with 2 internal fans to cool things down, using 12 XHP50's of the 6 volt variety. 6 of which...
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    Looking for buck 10A dc-dc driver w/dimmer

    Looking for dc-dc constant current 12-24 VDC in that outputs max 10A that has analog dimming function ( pot). Must be buck design. Not for flashlight but a high intensity light using Cree's XHP 50's. I came across this one but has little spec info. Any thoughts ...
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    Need high power driver

    Looking to power up 6 Cree XHP50 leds from battery ( 14.4V DC, 160watt/hr ) . Enclosure not limited to size as it will house a DC fan. Not a flashlight. Looking for driver that preferably has rotary pot dimming function. Driver must be able to output at least 100W reliably.
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    Driver needed for running 4 Cree XHP 70's

    The driver does not have to be small as it is not for a flashlight. The driver cavity volume within my enclosure is big enough for a 4" X 4 " X 2" ( 32 cu in volume.) I tried the Hyperboost in the past using the same 14.4 BRICK BATTERY and could not get more than about 75 watts going to the leds...
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    Driver needed for running 4 Cree XHP 70's

    I am building a light that will contain 4 XHP's (XHP 70) wired in series and powered by a 14.4 VDC li-ion 120 watt/hr brick type ENG battery. I am looking for a boost driver that must have dimming control via a pot (analog type). Anything out there ? I would need to run the leds at 80% their...
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    LED Resources in the USA?

    Although not in US, you can check out Cutter in Australia https://www.cutter.com.au/ They ship fast and usually get them within 7 to 10 days in US. I always buy from them for particular hard to find ones. They are reliable.
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    9V versions of Cree MT-G2

    Still can't locate any of them. At least a 3500K 9V version. Anyone?
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    Buck driver Dc-DC

    Anyone know of a DC-DC Buck driver DC in around 8 to 20 V with output around 8 to 10A ? Must have an analog pot dimmer. I came across this from DX but somehow must figure out how to add an external dim pot. is it possible ...
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    9V versions of Cree MT-G2

    I need the 3500K and the 5000K in 9V versions on copper 20mm stars. Cutter's site lists only the 6 and 36V ones. Highest flux if possible ( NO,PO )
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    9V versions of Cree MT-G2

    Thanks, I'll give them a call. Just hope they are reliable.
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    PWM vs Constant Current

    The problem we videographers have with led lighting is the flickering and banding ( horizontal lines) that appear on the video when PWM dimming is used. It happens at certain dim levels and at certain camera shutter speeds/ frame rates, usually when the camera is set for slow motion playback...
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    Glue/adhesive question

    I tried exactly that silicone from Ledgroupbuy and although easy to apply and heat resistant, it is not strong enough for my application. I made a few led units for video use with 24 XM-L's in them along with the Carclo holders and lenses. After rough use in transporting them and a few units...
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    Glue/adhesive question

    It is actually the holders and not the clear TIR itself made of a black plastic material like these: http://www.ledsupply.com/led-optics/10736-carclo-lens-holder?gclid=CLuNie_Uib4CFbM7OgodDwYA3Q I would prefer a one part tube type dispenser rather than mixing up batches of 2 part glues like epoxies.
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    Glue/adhesive question

    What do you use to cement the lens/TIR holders on the 20mm stars ? I need some sort of adhesive that will tolerate the high temperatures and vibrations/shocks. Is silicone good enough or there is something more specific for that ?
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    9V versions of Cree MT-G2

    Mouser ? nope. none in stock. This seems to be an enigma. A riddle within a puzzle in Pandora's box.
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