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Building a 1 watt LED light

Discussion in 'DIY Forum / Technical Articles' started by screwdriver, Jan 7, 2017.

  1. Nov 5, 2017 #161

    screwdriver

    screwdriver

    screwdriver

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    I bought a 100w full spectrum LED and lens kit. The LED is a 34vdc @ 3.0amps. To mount the LED I used the existing screws on the heatsink and drew up a cover in autocad. Then printed.

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  2. Nov 5, 2017 #162

    screwdriver

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    Here's the cover and mounting. May not be able to tell from the picture but there is some grease between the LED and heatsink.

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  3. Nov 5, 2017 #163

    screwdriver

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    All lit up.

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  4. Nov 5, 2017 #164

    screwdriver

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    I just have the vent laying over the top of the fan. I'm printing an adapter but it ain't done yet. And a peek thru the window.

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  5. Nov 5, 2017 #165

    screwdriver

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    This is how the LED is powered. With the printed adapter in place.

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  6. Nov 6, 2017 #166

    bombbudpuffa

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    bombbudpuffa

    Sweet Cheeba Chiefa

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    Nice build!
     
  7. Nov 12, 2017 #167

    bombbudpuffa

    bombbudpuffa

    bombbudpuffa

    Sweet Cheeba Chiefa

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    Here's my latest screwdriver. I'm using 2 citezen clu048 cob chips, 1 4000k and 1 3500k. Theyre being driven at 600ma and pulling a lil under 45w from the wall, 44.2w to be exact. They're so bright I can't believe I wasted so much time with the lil 3w chips.

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  8. Nov 12, 2017 #168

    screwdriver

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    I agree. But the little ones are fun to play with.
     
  9. Nov 13, 2017 #169

    bombbudpuffa

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    Right now on cobkits.com you can buy the citizen clu048 chips for $9-11 each. They're regularly $20+ and kind of fun to play with themselves. I'm going to build another just as soon as my other components arrive.
     
  10. Nov 20, 2017 #170

    bombbudpuffa

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    bombbudpuffa

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    Here's a lil light I threw together using a cheap Chinese 20w cob with an integrated driver. Just soldered a 110v ac plug to it, mounted it to a heat sink and it's done. Pulling a lil over 12w from the wall.

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  11. Nov 24, 2017 #171

    screwdriver

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    I like the idea of the integrated driver, but it does keep all the heat dissipation at the light. Did you get a reflector or lens for it? I have a 60 degree on my full spectrum and a 120 degree on a red led. Still debating if a lens is necessary, but it looks cool.
     
  12. Nov 24, 2017 #172

    bombbudpuffa

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    It's just like any other chip that I've played with. It needs a heat sink. No I didn't buy any reflectors. I like the cobs without refkectors. Coverage is better. Here's one I built using lenses but I took the lenses off.

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  13. Dec 3, 2017 #173

    bombbudpuffa

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    Latest build. 3 citizen clu048 1212 chips running at 1050ma on a dimmable inventronics driver. Pulling 30w from the wall fully dim and 140w from the wall turned up 100%. Using three active heatsinks driven in line by some lil 12v drivers.

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  14. Dec 8, 2017 #174

    screwdriver

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    I saw this along time ago but finally made one for my lights. It needs alot of improvements but I'll still be able to look at the spectrum. Simple design off the internet. I cut out some pieces of wood to make a box. Painted the interior flat black. Theres a divider mounted at about a 30 degree angle with a diffraction gradient placed over a window in the divider. A USB camera looking through the slide and window to the slit. A small slit cut into the front panel where the light enters.

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  15. Dec 8, 2017 #175

    screwdriver

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    This is the spectrum of an old CFL I used to calibrate the spectrometer. I calibrated the software graph by dragging a couple of pointers to the correct peaks. One peak is 436nm, that corresponds to the Mercury used in the bulbs. The second peak is 546nm, also mercury. Theres no pointer but there is also a mercury peak about 692nm. In my bulb that peak is about 687nm.

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  16. Dec 8, 2017 #176

    screwdriver

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    Heres a uv bulb spectrum, you can see the 436nm peak, slightly off at 437nm and the other at 694nm. Im too lazy to look up what gases cause the other peaks.

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  17. Dec 8, 2017 #177

    bombbudpuffa

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    Man, I wish I understood what you were talking about.
     
  18. Dec 8, 2017 #178

    screwdriver

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    Just looking at the spectrums of some bulbs that are laying around the house. I really want to see the spectrum of the "Full Spectrum" LED but haven't got that far in testing. It would also be nice to see the spectrum shape of the other LED colors.
     
  19. Dec 8, 2017 #179

    bombbudpuffa

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    Yea, I get what your testing for. I'm just not getting how you're doing it. Like the lil box thing. What's that program?
     
  20. Dec 8, 2017 #180

    screwdriver

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    I just ripped this off the internet, the box is used to shield all the light except a little tiny sliver that goes thru the slit. The slit width is important in the future but not for now. The distance of the box slit to camera is also important for future calculations, may be beyond me. For now, I want the wavelength peaks. The intensity of a particular wavelength is for the future, baby steps.
    The software is Theremino. A diy place on the internet. Just having phun with photons..
    The diffraction gradient splits the light into its rainbow of components with magic.
     

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