DiY LED - Cree CXA3070

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avnewb

Well-Known Member
@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
 
SupraSPL

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.
 
SupraSPL

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.
DSC07934a.jpg

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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avnewb

Well-Known Member
SupraSPL said:
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.
Click to expand...
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

Abiqua

Well-Known Member
SupraSPL said:
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.
View attachment 3333218

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%
Click to expand...
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]
fast.jpg
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

 
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avnewb

Well-Known Member
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.
 
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JavaCo

JavaCo

Well-Known Member
avnewb said:
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.
Click to expand...
Yeah you don't want to hook them up backwards. Hopefully you didn't power it on.
 
Abiqua

Abiqua

Well-Known Member
Abiqua

Abiqua

Well-Known Member
nestor

nestor

Well-Known Member
nestor said:
Been awhile since I've checked this thread. Nice to see its still going strong a year later.

I stumbled across some interesting drivers that might work well for fans. Thought I'd share:
http://www.ebay.com/itm/261653490178?_trksid=p2060778.m2749.l2649&ssPageName=STRK:MEBIDX:IT

At $1.59 each seems kind of hard to beat and gets away from using multiple wall sockets.
Click to expand...
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.
 
BeaglesnBlunts

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?
 
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