medicinehuman
Well-Known Member
70 cobs now, its a bit big.
That = lots of good stuff growing, you'll be busy.
DiY LED - Cree CXA3070
- Thread starter SupraSPL
- Start date
That = lots of good stuff growing, you'll be busy.
@SupraSPL
I assume it was your review on the fasttech website for the 120v drivers I got?
U tested one or more? to 150v, so I will be good with five vero10s in series.
~133v @ 0.28a so can use 22g wire as such low amps or?
Before I wire it up probably want to be sure. Havent done circuits in a while.
Make better sense to do 6x5 so 30 of them on on 50x36" mount or stick with 25? I could add a single row across the 5 heatsinks at one and they would be spaced 8" apart seems plenty as there so small. Or do all 35 on it? 18sqft.
TIA
I assume it was your review on the fasttech website for the 120v drivers I got?
U tested one or more? to 150v, so I will be good with five vero10s in series.
~133v @ 0.28a so can use 22g wire as such low amps or?
Before I wire it up probably want to be sure. Havent done circuits in a while.
Make better sense to do 6x5 so 30 of them on on 50x36" mount or stick with 25? I could add a single row across the 5 heatsinks at one and they would be spaced 8" apart seems plenty as there so small. Or do all 35 on it? 18sqft.
TIA
SupraSPL
Well-Known Member
I just put (4) CXA3070s in series with a 13V LED (~147Vf), hooked the string up to 4 different 18-36X1W drivers and all 4 drivers were AOK so you should have plenty of headroom with (5) Vero 10s.
22 ga should be OK for short runs although i have not tested it for voltage drop, I use 18 ga for just about everything on the DC side.
22 ga should be OK for short runs although i have not tested it for voltage drop, I use 18 ga for just about everything on the DC side.
I wonder if the 67v version will run 3 V10's? That would be great news for my veg space!
SupraSPL
Well-Known Member
Thats a good question. I am testing the "dark energy" 12-18X1W size. It could drive 3 Vero 10s at 260mA with 89.5% efficiency with headroom to spare (89Vf max), but I cannot figure out where I got this one from. It does not match the picture on Fasttech. It is possible that it came inside an LED fixture.
These would work, $2.41 ea although they are not the dark energy boards. These come with a case for $3.41 ea, or here for $3 ea, and they work work also (max Vf 80). They may put out less current and I am measuring a lower efficiency at high Vf range, 87.5%
These would work, $2.41 ea although they are not the dark energy boards. These come with a case for $3.41 ea, or here for $3 ea, and they work work also (max Vf 80). They may put out less current and I am measuring a lower efficiency at high Vf range, 87.5%
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Still waiting on drivers but I will try to run tests to see what I get.
Tonight am going to glue the COBs to fixture and wire them up. Found a bunch of 18g trailer wire that will use. Soldering to cobs as didnt get the molex connectors. May ground the fixture as u said just as a precaution.
Still cant decide if I should go with 30 on 6 drivers for this fixture as should be fine for heat or stick with just the 25 on five drivers. I might be fine with all 35 on it with slight breeze but no need to go over 25 if not needed. I just dont know.
'
Friend just came over saying need to put in 600w MH/HPS so really want to show him up with what these cobs can do.
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Abiqua
Well-Known Member
Here are the Fasttech 12-18w's open case [Are these the "dark matter" 's?
http://www.fasttech.com/products/1612/10008079/1714803-12-18-1w-85-277v-18w-high-power-constant-current
same as these with the case
http://www.fasttech.com/products/1612/10008079/1714803-12-18-1w-85-277v-18w-high-power-constant-current
[my pic]
What's interesting is that I just picked some of these off of Ebay....14-18x 3w [36-75v @ 600ma]. They were the highest rated efficiency out of cheapo drivers [90% w/95 pfc] and seem to be similar construction as the Fasttech boards...
http://www.ebay.com/itm/Constant-Current-Driver-for-14-18pcs-3W-High-Power-LED-AC85-265V-
600mA/191472026292?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D27673%26meid%3D13f30735915248329749134938e668a4%26pid%3D100005%26rk%3D1%26rkt%3D6%26sd%3D321445378659&rt=nc
I assume these Vero 10 cobs need to be hooked in series positive to negative. So hooking one up backward in a series is no good. ? Or DC so doesn't matter?
im sure it matters as would not have +/-.
hooked one up backwards as glued one on 180* upsidown by mistake.
im sure it matters as would not have +/-.
hooked one up backwards as glued one on 180* upsidown by mistake.
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JavaCo
Well-Known Member
Yeah you don't want to hook them up backwards. Hopefully you didn't power it on.
AquariusPanta
Well-Known Member
Abiqua
Well-Known Member
yep, can't go back and edit either....thanks for the heads up Aqua! @AquariusPanta
http://www.fasttech.com/products/1612/10008256/1739206-27-63v-9-18-1w-led-constant-current-isolation
Abiqua
Well-Known Member
Was going to buy the top link and poked around a bit, just picked up one of these to try out for a veg light.....could run a single CXA3590 for cheap! But they are only "280mA"
24-80v $2.43
http://www.aliexpress.com/item/Trustworthy-External-Ceiling-Light-LED-Power-Driver-Supply-Transformer-8-25W-Cami/2026573052.html
nestor
Well-Known Member
Just got these delivered yesterday. I haven't had time to do any real tests, but I did hook one up. Its keeping the heatsink barely above ambient temperature - its a 3070 @ 1.4A. I don't currently have the equipment to hook up 3 fans to a single driver or to be able to test it for efficiency. Hopefully I can get some of that information in the next couple days.
So far I can tell you at 1:1 driver/fan it keeps it noticeably cooler than a 12v .2a cell phone charger.
uzerneims
Well-Known Member
Can i run this - http://www.ebay.com/itm/DC-12V-LED-Driver-Transformer-Constant-Voltage-6W-10W-18W-40W-For-LED-Strip-2014-/121439918711?pt=UK_Home_Garden_Lighting_Parts&var=&hash=item1c46621a77
18W
__
So my plan is to run for first two fans at 12V, so 0.4A, so i have still left 1A for future fans, right? if it's constant voltage..
18W
__
So my plan is to run for first two fans at 12V, so 0.4A, so i have still left 1A for future fans, right? if it's constant voltage..
Abiqua
Well-Known Member
yep....
AquariusPanta
Well-Known Member
@uzerneims
Yes, those drivers should work just like the phone/tablet chargers but will prove more simplistic and convenient.
Also, @SupraSPL found that 5V power supplies run much more efficiently and still keep away heat buildup.
Yes, those drivers should work just like the phone/tablet chargers but will prove more simplistic and convenient.
Also, @SupraSPL found that 5V power supplies run much more efficiently and still keep away heat buildup.
BeaglesnBlunts
Member
I'm interested in doing a flowering setup with 24 3000k 3070 ab's at 350mAh. I'm thinking a 3x3 area which puts it at about 15 par/sq ft. I wanted to use the 50-2234C ideal holders, but they're only rated to 250v/4amps. I'd like to use two HLG-120H-C350 to power 12 each, but if I'm to obey the ideal holder specs I must sacrifice a good deal of efficiency by splitting it into 3 or 4 smaller power supplies. At that point it'd be pointless and I might as well rethink it as a 500 or 700 mah unit.
Can the ideal holders withstand more than their specs let on at lower temps? They're rated to 110 C and I won't be anywhere near that. Probably wishful thinking. Should I just suck it up and abandon the handy holders?
Can the ideal holders withstand more than their specs let on at lower temps? They're rated to 110 C and I won't be anywhere near that. Probably wishful thinking. Should I just suck it up and abandon the handy holders?