Dry firing cobs
- Thread starter Krytend
- Start date
You could lay them on some metal like a frying pan or something then they will get some cooling. Maybe even cool the pan first.
nfhiggs
Well-Known Member
As Cobbie indicated, dim the driver down to minimum, test for no more than a second, just to see if they light.
I did the same thing with one of my 24V strips, cuz I was not sure of the voltage it needed. I just touched the leads of my 36 V supply to it just long enough to see it light up bright as fuck. Luckily it did not hurt it but that was way more voltage than they needed.
I did the same thing with one of my 24V strips, cuz I was not sure of the voltage it needed. I just touched the leads of my 36 V supply to it just long enough to see it light up bright as fuck. Luckily it did not hurt it but that was way more voltage than they needed.
VegasWinner
Well-Known Member
you could add up the volts of the cobs and compare that to the Vf of the driver. Whatever you do could you record it for posterity? I would connect cobs to heatsinks, I hate to waste my hard earned money. patience is a virtue.
CannaBruh
Well-Known Member
i have videos on instagram showing powering of 3590s with constant voltage supply from 0-36V+ with no heatsink and all of those COBs are still in use today, just don't burn them up
OP would be better served to offer specifics of the build, particular LED/driver combo and we could tell you on paper if it should be ok.
OP would be better served to offer specifics of the build, particular LED/driver combo and we could tell you on paper if it should be ok.
Krytend
Well-Known Member
It's my first build it's either going to a 4 or 5 cob building. I feel safer not mounting the chips and have to cut into the frame or drill with the acutal cob attacked.
Krytend
Well-Known Member
Krytend
Well-Known Member
I've looked up the spec and had debates with members if the driver will run 4 or 5 Vero' 29's
Krytend
Well-Known Member
I've looked up the spec and had debates with members if the driver will run 4 or 5 Vero' 29's
We never came to an answer
CannaBruh
Well-Known Member
I don't know about Vero specifically, but the CREE 3590 will fire at a potential lower than than the 36V, it will just be dimmer.
If it will run 4 then perhaps It's possible that the 5 Veros might run on a (might not have enough voltage) system but at a slightly lower forward voltage for each LED.
If it will run 4 then perhaps It's possible that the 5 Veros might run on a (might not have enough voltage) system but at a slightly lower forward voltage for each LED.
nfhiggs
Well-Known Member
Exactly. COB's will operate within a fairly wide range of 5-7 volts, centered on their spec'd voltage.
VegasWinner
Well-Known Member
That is an expensive way to find out. What I did when experimenting. I connected minimum number of cobs. I have mixed 36v with 72v on a common driver it works. Constant Current says I will send the same current to each cob, 1400mmA in my case for 72v that means it generates 100w while a 36v cob generates 50w at the same time.
I would mount the cob's on heat sinks before doing anything. experiment with connecting after you have mounted that takes what two hours, or are you waiting for heat sinks too..
So what did you buy? driver cob number just curious.