Introducing CobKits.com - specializing in DIY and Citizen COBs

ANC

Well-Known Member
A friend has a bunch of 9x 55V 1500mA noname brand drivers...
Any suggestions of COBS that would make a nice low cost build.
I've already looked at strips but thought I'd give you a bump.
 

mooray

Well-Known Member
This is cobkits in action.

Here is Sundae Driver at week 8 and to the left is Lava Cake at week 5

Here is Wedding Pie at harvest
What chips/driver are you using in each 3x3 light and at what total wattage? I was hoping to get away with four CLU048-1212 80CRI Gen6 3500k chips and a single HLG-185H-36A driver running at ~200w total under a 3x3(OD), but your setup is having me thinking that it's not going to be enough. Also, why no reflectors?
 

CobKits

Well-Known Member
hes in a larger open room. those are 9 luminus on 3 x 185-48A's i beleive. if i recall topshelf's canopy goes a little wider than 3x3 and is closer to a 4x4
 

Shua1991

Well-Known Member
So about a year back, I bought some supplies, spent about a grand getting everything from heat sinks to cobs and waygos and whatnot. In the last 6 months I've had my 480h power supply overheat on me, fry a few cobs and now it just turns off after soldering the first few cobs to avoid using the original pieces that connected to the heatsinks(which melted, destroying a few cobs). Now I reset the array and after an hour or so the lighting is off, no signs of burnt tech, wtf is causing this? Anyone have it just shut off on you before? I'd rather not sell this stuff for scraps and replace with CMH if I don't have to, but I'm not going to chance getting herms or the stress of having to babysit a lighting array like this.
 

Airwalker16

Well-Known Member
So about a year back, I bought some supplies, spent about a grand getting everything from heat sinks to cobs and waygos and whatnot. In the last 6 months I've had my 480h power supply overheat on me, fry a few cobs and now it just turns off after soldering the first few cobs to avoid using the original pieces that connected to the heatsinks(which melted, destroying a few cobs). Now I reset the array and after an hour or so the lighting is off, no signs of burnt tech, wtf is causing this? Anyone have it just shut off on you before? I'd rather not sell this stuff for scraps and replace with CMH if I don't have to, but I'm not going to chance getting herms or the stress of having to babysit a lighting array like this.
Your driver is most likely fried. I literally just got one back in the nail after sensing it off to warranty a few weeks ago.contact the supplier you bought it from and have them send it off to be RMA'd. Return Merchandise Agreement.
They're not bulletproof.
 

Shua1991

Well-Known Member
So is it still working? I don't understand.
For like half and hour then it shuts off, I'm wondering if it's from overheating or if it's something to do with the faulty driver. I have another one of the same model but I'm thinking I should buy a different model altogether. I put a fan on it and now it's able to stay on longer, I'll see how it goes for the next few days. I think the summertime temps fried it.
 

Airwalker16

Well-Known Member
For like half and hour then it shuts off, I'm wondering if it's from overheating or if it's something to do with the faulty driver. I have another one of the same model but I'm thinking I should buy a different model altogether.
Having 2 240's is definitely a lot more fail safe than a big honkin 480. Firstly, you need to remotely mount that driver outside the tent. They get hot enough already. No point in strapping it to a frame to get even hotter. Just extend your 2 wires coming off the driver to the cobs so it can be placed outside of the tent.
If you have another 480, definitely hook it up and see what happens.
But it sounds like to me a protective switch is triggering for heat overload.
 

CobKits

Well-Known Member
For like half and hour then it shuts off, I'm wondering if it's from overheating or if it's something to do with the faulty driver. I have another one of the same model but I'm thinking I should buy a different model altogether. I put a fan on it and now it's able to stay on longer, I'll see how it goes for the next few days. I think the summertime temps fried it.
id disconnect it and get it out of the hot zone. run 12 or 14 ga up to your array. mounting it right by where the heat from the nearby heatsink is conducting to the driver case is prob inhibiting cooling
 

Shua1991

Well-Known Member
Removed it and set it on top of the tent, I'll see how this goes, I never imagined the heat on the damn thing got that high, it was fine for about half a year before any of this started occuring, I guess it was just winter time so the air current was cooler then. I'll see if it's any different, the fan seems to be working for the 4 hours it's been on it, I've got the same thing going in a closet with slightly different wiring and the driver isn't attached to the framing, so it's very likely the cause of the overheating. Thanks for the input y'all.
 

Ryante55

Well-Known Member
Removed it and set it on top of the tent, I'll see how this goes, I never imagined the heat on the damn thing got that high, it was fine for about half a year before any of this started occuring, I guess it was just winter time so the air current was cooler then. I'll see if it's any different, the fan seems to be working for the 4 hours it's been on it, I've got the same thing going in a closet with slightly different wiring and the driver isn't attached to the framing, so it's very likely the cause of the overheating. Thanks for the input y'all.
When I run drivers at their max they get super hot but with led in most cases you need the heat maybe not in the hottest part of summer but in the winter that extra heat is useful in the summer I personally just dim a little. It would be better to use the extra light and run the drivers outside during the summer but I personally don't need to max yield out that much and I run so many diodes the increase in effeciency from dimming probably almost makes up for the wattage loss just have to run the lights closer
 
Top