DiY LEDs - How to Power Them

alesh

alesh

Well-Known Member
SLITLOS said:
Thanks for the feedback, electrical thing are not my thing, but I was under the impression that you could turn down the amps and voltage with the 2 adjustment
screws on the top of the driver?? Or do I have things fucked up as normal?
SLITLOS
Click to expand...
You could do that but it seems like a waste to me to have such a big driver dimmed to 50-60% all the time.
 
S

SLITLOS

Well-Known Member
alesh said:
You could do that but it seems like a waste to me to have such a big driver dimmed to 50-60% all the time.
Click to expand...
Again I must have things assbackwards, I thought that the two screws were to adjust the driver
to what amp/voltage to accommodate your cob's? Im slow on the electron front, got a D in Aero
Math, but an A Aero Meterials/sheetmetal, in other words, I can build an airframe by hand, but don't know how wire the MF.
Let me go back to a Grow light for a 3'X3'X8', I have 4 29-2's @5000K, what would be a good dimable driver for this?
For the Grow light, I have 3'X6'X10'H area, what driver/s to run 2--3'X3" with 6?/9? V-29-2's 3500K
per light, already have 4, dimable, the plants will be tall regular seed, like Mandala Seeds, Satori.
Maybe driven a little bit hard, Thanks.
SLITLOS
 
littlejacob

littlejacob

Well-Known Member
QUOTE="brettsog, post: 11877592, member: 423334"]I looked at kingbrite and could only find lenses. Kingbrite.cn ?

Edit: nvm u meant on alibab.

I have placed an order for 5 of those (min order) and a meanwell driver. $255 plus shipping. Will wait for reply from them. Probably be £200 in total for better equipment so much appreciation for the heads up
CREE CXB3590 3500K, CD 36V 80CRI, CXB3590-0000-000N0HCD35G

http://www.ebay.co.uk/itm/Arctic-Cooling-Alpine-64-GT-Rev-2-AMD-CPU-Cooler-UCACO-P1600-GBA01-AC-Artic/121255513633?_trksid=p2047675.c100005.m1851&_trkparms=aid=222007&algo=SIC.MBE&ao=1&asc=32694&meid=426cb29dfe57455ebe5121f864e71ff4&pid=100005&rk=1&rkt=6&sd=151679816071

Are these individual fan and heatsinks enough to keep cobs cool?
[/QUOTE]
Bonjour
If you want only 4 cxb 3590 it is ok with kb.no need to buy 5!
You gonna need 4 holder for the cxb, unless you plan to solder!?
Why don't you buy a h.s? (45 €)
And if you can wait 2weeks for.the cob it is 10$ shipping with china post option!
As for the driver a hlg is 70 €
Have a great day ★
 
CanadianONE

CanadianONE

Well-Known Member
CDiablo said:
@robincnn Thanks for the reflector suggestion. I saw that @Growmau5 was using those reflectors in one of his awesome fixtures. As it stands I am gong to go with the Mean Well HLG-120H-C1400B, to provide roughly 50w to each 3070. As for the heatsink I am going to go with passive cooling(I don't like the fan noise). Ive been getting quotes from a few Chinese distributors but I am potentially spending about $80 a piece on a 5.5'x6"x1" long heatsink. I found some really cheap heatsink here they have several sizes from small all the way up to a 4'x5.5"x.8" which they have rated as up to 50x3w or 1x 140w passive for around $60 a piece shipped. Nothing is set in stone but this will likely be my build.
Click to expand...
Are you going with CXAor CXB 3070's?
 
Meinolf

Meinolf

Well-Known Member
Can somebody recommend
- a relatively efficient, relatively cheap 20W / ~700mA / 30V driver, probably open frame?
- a relatively efficient, relatively cheap 40W / ~1400mA / 30V driver, probably open frame?
 
CanadianONE

CanadianONE

Well-Known Member
Here are a few options from the Meanwell stable around the 85% efficient mark.
Meinolf said:
Can somebody recommend
- a relatively efficient, relatively cheap 20W / ~700mA / 30V driver, probably open frame?
- a relatively efficient, relatively cheap 40W / ~1400mA / 30V driver, probably open frame?
Click to expand...
700mA LPC-20-700 & APC-35-700
1400mA LPC-60-1400 (Little higher voltage though)
There are probably some cheaper ebay options and some people on here have successfully used many of them including @SupraSPL
 
Meinolf

Meinolf

Well-Known Member
CanadianONE said:
Here are a few options from the Meanwell stable around the 85% efficient mark.


700mA LPC-20-700 & APC-35-700
1400mA LPC-60-1400 (Little higher voltage though)
There are probably some cheaper ebay options and some people on here have successfully used many of them including @SupraSPL
Click to expand...
Thank you. Yes, I was thinking of something "chinese", that is cheaper and more efficient at the same time. I recall such drivers exist. Would you help me out, @SupraSPL?
 
CanadianONE

CanadianONE

Well-Known Member
Meinolf said:
Thank you. Yes, I was thinking of something "chinese", that is cheaper and more efficient at the same time. I recall such drivers exist. Would you help me out, @SupraSPL?
Click to expand...
You can check these out http://www.ebay.ca/itm/400921774021?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT, Voltage is a little higher then 30V again but they offer a 600mA & 1500mA version. Power factor corrected & efficiency claimed as high 90% $6-$10USD
Also these http://www.ebay.ca/itm/Water-Proof-Power-Supply-LED-Driver-for-3x3w-10w-20w-30w-50w-100w-SMD-LED-Light-/291463138119?var=&hash=item43dc8e8b47
 
Iceveign

Iceveign

Active Member
Iceveign said:
So I got my lights hooked up and working, 2 heat sinks 5.88" x 19" with 2 cobs on each(3590 3500k 36v) being run by HLG-185H-C1400.

My question is how hot should the heatsinks be? I touched for a few seconds and they are really hot, just wondering what I should be observing if any thing.
Click to expand...
Just wanted to give an update on my heat concerns on this build. After 2 days the heat is barely noticeable to the touch. I never had to add any fans. I think my mistake was not giving the thermal paste enough, ( OK any) time to cure. I was so excited to see if the light would work I forgot about letting the paste setup. I am using ideal cob holders and prolimatech pk3 thermal paste and all is good now.
 
littlejacob

littlejacob

Well-Known Member
Iceveign said:
Just wanted to give an update on my heat concerns on this build. After 2 days the heat is barely noticeable to the touch. I never had to add any fans. I think my mistake was not giving the thermal paste enough, ( OK any) time to cure. I was so excited to see if the light would work I forgot about letting the paste setup. I am using ideal cob holders and prolimatech pk3 thermal paste and all is good now.
Click to expand...
Bonjour
I have build the same thing but my h.s is a bit bigger than yours, how tall and how much are the fins?!?
I have one 120mm fan on each h.s @6v.if you can use it without fans, I am going to lower my fan speed and be less stressed by a fan failure.(I have nothing to take temperature and needed to be sure.)
But are you driving them at full power atm?
Did you do the math to be sure and don't fry your eggs!??
How long is it better to wait after applying tim (I waited 2 days!)
Have a great day ★
 
Iceveign

Iceveign

Active Member
littlejacob said:
Bonjour
I have build the same thing but my h.s is a bit bigger than yours, how tall and how much are the fins?!?
I have one 120mm fan on each h.s @6v.if you can use it without fans, I am going to lower my fan speed and be less stressed by a fan failure.(I have nothing to take temperature and needed to be sure.)
But are you driving them at full power atm?
Did you do the math to be sure and don't fry your eggs!??
How long is it better to wait after applying tim (I waited 2 days!)
Have a great day ★
Click to expand...
my Heatsinks have 14 fins each and the overall height is a 1.25 inches or 31.75 mm

Did I do the math? heck no that's what Supra's for,lol

I have 4 running on the 1 driver at 49 watts each(I guess), have a potentiometer hooked up and am running it at the highest setting, so I guess thats full power.

I think I read 48 hours is the recommended time for the thermal paste to cure.

All I know is when I first hooked the lights up right after installing the cobs, holders and pk3 paste, I put the back of my hand in the middle of the heatsink and could only keep it there for 3 or 4 seconds it was so hot, it's been 5 days now and I can leave my hand on the heat sink for as long as I want, it's just barely warm.

So letting the thermal paste cure for a couple of days or more is probably wise.
 
littlejacob

littlejacob

Well-Known Member
brettsog said:
If I need to power 3 x 12v 0.25ma pc fans. What's my best option? How powerful a driver would I need

Edit: would this be suitable http://www.screwfix.com/p/halolite-led-constant-voltage-driver-1-16va/85503#product_additional_details_container
Click to expand...
Bonjour
It is expensive just for 3 fans...
Do you really need 12V? Why not an old phone charger? Or a dimmable 12V(1A) universal charger (6, 50 €) it worked just fine! And easy to find at a local store!
Have a great day ★
 
D

Devildenis69

Well-Known Member
Hello guys, I'm searching for a driver able to drive 2 vero18 + 3 luxeon 660nm (65V) at 700ma with dimming option
so a 45~50W driver @700ma, any ideas ?
 
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