I’ve been thinking about maybe making the “hand cannon” like an old school dry cell lantern except just put a strap on a carbon plate or something and then I can strap whatever LiPo I have with me to it. Then I could use either a 6s3300 or a 6s22k or one of my 7s4p li-ion packs.
Got any links to the new Luminus COBs?
I think I’m going to order some of these 82mm LEDIL ANGELINA reflectors. Somehow I had not previously noticed their dimensions and they’re smaller than I previously thought which might work well for the battle lantern.
RapidLED has two of them at what seem to be good prices and they have the mounting hardware.
I’m also going to get a LDH-45A-1050 and maybe a LDH-45B-1050 as the battle lantern definitely won’t be able to handle anything more powerful and it’ll still make ~7000 lumens which ought to be pretty fun considering that stock, I think it’s something like a 9w incandescent.
7000 is a LOT… I installed an LDH-45A-1050 in a cheapo outdoor 50W spotlight someone game me that had a blown driver. This actually fit the bill nicely, and now I have a nice portable outdoor work light. Just need to make a yoke for it so I can use it with my tripod.
You can get one without the casing from DigiKey and save about $10 or so, which is what I did.
Yeah, these higher voltages are not the easiest to deal with for portable stuff. Might have to look into e-bike batteries. We do have a couple e-Go yard tools at home - a lawn mower and line trimmer - that use 56V batteries.
Yeah, seems the only one that can’t be had is the 80cri 5000k one that I want. LOL figures.
F13380 Angela-M (30deg) and F13381 Angela-W (45deg) are underperformers as they have a lower efficiency than most of the other LEDiL reflectors despite their size.
I think the F13402 Angelina-W will be the best for the CXB3590 and the under-driven battle lantern project.
CMA3090 series seems to be the most “well rounded” COB that is available, high output and only ~$30-35. Though, I don’t know how I would drive it yet at full output. It appears to produce nice beams with most of the LEDiL reflectors unlike the CXB3590 which seems to be too big or not have an ideal radiation pattern. The CMA3090 does seem to be larger than whatever the ideal size is but it makes up for that with crazy output where the COBs that are the ideal size only produce ~5000lm.
Annoyingly, Arrow only sells the C14036 clamp needed for the CMA3090 in large quantities. Mouser has it but then you have to pay for shipping.
The CMA3090 is actually a_ lot_ smaller than the CXB3590, having both in-hand. I really want to use this in a portable light. Finding a DC 170W boost driver though is not easy. I suppose I could dumb it down. And I haven’t tested the voltage output of the Stratus LED driver yet at 14.4V and 24V input.
I am liking that CMT2890 for the fact that the power requirements are a lot more manageable (about 10K lumens at 60W and 1.6A.)
Found another resource for COBs and heatsinks that seems pretty reasonable. They have an active heatsink they say can dissipate 400W…
OK so I set up a 3590 on my test heatsink (the screw down holes weren’t wide enough for the COB! so I just held it down with thermal paste). Attached a Stratus LED driver and 3s LiPo 5000mAh 75c… I got 42.9V at the LED contacts and the pot turned about half way before I tripped something. Still too low to drive the CMA3090 (and I tried.) Couldn’t take a current reading - my shades fell off and I flashed my eyes. That 3590 is like the sun, and it probably would’ve taken more. Not sure what it is on the Stratus driver that makes it cut off past a certain point - I’m no electronics guy…
Even with a 2s LiPo I still get a 41.5V reading with the pot at max. Even crazier, I was able to light that 3590 using a 9V battery (though it would flicker if I moved the pot more than 1/5 of a turn.) So this cheap boost driver seems like it could be a lot more versatile than just some COB driver… In fact I bought another 3-pack for $45 because I have a few projects where this would be just perfect. I even tested it on a light module I made with 3 XHP35s in series and it worked perfectly- with dimming.
So I checked again the data sheet for CXB3590 and it lists the max current at 3.6A. So not sure what circuitry I’m tripping with the Stratus LED driver. If I disconnect the power, lower the pot, and plug it back in, all’s well. But, there has to be some way of disabling this…
I saw that Mechatronics IceLED Ultra elsewhere recently. It looks nice except that I have no idea how they expect you to mount that to anything since the fan doesn’t appear to have any lugs or anything on the top. I didn’t dig too deep. The heat sink is just a custom aluminum extrusion cut and sold in different lengths. I question the ability to keep a really high wattage LED cool with nothing but a slug of aluminum on it. However, I’m really trying to keep these COBs COLD for maximum performance.
Driving the CMA3090 at full output AND keeping it cool is definitely going to take some math and engineering. ~150w of heat from something that small won’t be easy unless I resort to water and an AIO.
At home, I have a B&K bench PSU that my brother gave me that I’ve been using for my shenanigans. It’s nice because it displays the current and I can measure the voltage with my Fluke. I just set the voltage to ~40vdc and then use the current limit knob. At work, we have a few really nice Agilent PSUs that I can wire in series to get quite a bit of power for testing but I haven’t done that… yet.
I’d guess you’re tripping an input current limit with the lipos but with the 9v, I bet it just can’t get enough power to work properly. Boosting up to high voltages isn’t hard. Boosting up to high voltages AND high power, is… I’ll have to look at the documentation for the Stratus LED again.
Anyway, I should have some more bits in the mail to play with this weekend.
I think the design of the IceLED is such that the fins also double as t-tracks for mounting. It’s also supposedly rated for horizontal as well as vertical use, so it’d be good for a hand cannon. Pretty much all these heat sinks are extrusions. Mechatronix has passive solutions as well, which have a sintered copper heat pipe in the center and are also rated for horizontal or vertical use. And they’re sized to neatly fit MeanWell drivers (maybe I should have gotten the cased one…
The Stratus LED site doesn’t list any input current parameters. With the 9V battery the light will flicker if I turn the dimmer pot up - but I did it more as a goof than anything. Only thing I can think of is that there’s some circuitry that is limiting output at 100W - they got these drivers specifically tuned to the Bridgelux COBs I would guess. Probably it’d work better with 4s or 6s, but I don’t have either. I do have two identical 2S batteries, but I’ll have to make a series connector for them.