Jimjim's new diy 'creeation'

jimjim2609

jimjim2609

Well-Known Member
This is my latest diy creation. It has 10 x Cree XTE warm white leds and 4 x 10w red:blue chips. The 10w chips run 8 x 3w 660nm and 1 x 3w 445nm. They will only be run at 300mA so they should run a total of 6w each for a total of 24w. The Cree leds will be run at 1.2A. This works out that they will equate to 4w each for a total of 40w. The fan is a 70mmx70mm pc fan. It is rated at 12v 0.25A total of 3w. The power supply for the fan is a 12v 0.3A which equals 4w. I'm not to sure how long the fan will run at 4w for but I have a 120mm pc fan coming. I am unsure whether to put reflectors on the crees or just to leave them as they are. Let me know what your thoughts are and any improvements I can make.:cool:
 

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Abiqua

Abiqua

Well-Known Member
I would think the fan would be fine at 4w, especially if it is a 12v wall wart. A lot of wall warts even regulated like to jump around [voltage wise] without full loads. So, what you have is ideal for sizing, just about the same specs, with a little extra.

I run two 80mm 12v .25amp fans on a 12v .5 amp circuit cellphone charger, run them 18hours a day no problems.

What are the measurements on the heatsink?
Drivers?

What about humidity in the grow space, how come nobody addresses that? Is it a non-issue with uncovered leads?

I Like the light. Simple and clean. Bet a few of them together would make anybody happy. Cheers.
 
jimjim2609

jimjim2609

Well-Known Member
The heatsink is 300mm x 140mm x 21mm. I have not found any issue with humidity so far, I just make sure i have good air flow. The box i use is only 80cm x 45cm x 80cm and i have 2 120mm pc fans running 24/7. 1 for intake and 1 exhaust. Temps sit at around 17(night) - 30(day) deg C and between 25% and 50% RH.
 
L

LEDmania

Active Member
Hey, Jimmy, good job you've done, have you tried to run the great DIY panel for some hours and then test the temperature?
To the secondary optical lenses, yes adding them please if you have. I am looking forward to seeing you hang this panel over your plants....
Oh, by the way, what's the exact coverage at 12" and 20"?
Again, good job.. hey.
 
Bumping Spheda

Bumping Spheda

Well-Known Member
Whoa. I'm in love. As I'm sure you know, the 10W R/B multichips have an awesome R/B ratio for flower compared to the higher wattage iterations (20W, 30W, 50W, etc). And then the XT-E's are a delicious icing on top of the cake. You also had the option to go all 660nm multichips over the R/B "grow" version, and yet you stuck with the R/B model. I admire this. I think the Blue chips will be an excellent substitution for mixing Neutral or Cool White chips in with the Warm White as a lot of people seem to like to do. They should definitely help with the frostiness and stretch during flower.

Iirc, the 10W multichips have 120 degree viewing angles? I think adding optics on the XT-E's might be nice, actually. Depends on your desired panel height/footprint, imo.

Nicely done, dude. :clap:
 
jimjim2609

jimjim2609

Well-Known Member
I haven't run it yet. Im waiting on the driver for the crees. I could run the R:B chips at 630mA and then that gives me closer to 15w each but i think they would run a lot hotter and not as efficient. These are the specs if anyones interested.

led spec.JPG

I initially was just going to use only warm whites because if you have a look at there wavelength it looks pretty good. But when my heatsink arrived, they sent me one twice as wide as what i ordered, and i had the 10w chips laying around so why not use them.
Heres a link for the cree xte datasheet and a pic of the cree wavelengths.

cree data.jpg

http://www.cree.com/~/media/Files/Cree/LED Components and Modules/XLamp/Data and Binning/XLampXTE.pdf

I have got some 60deg reflector on the way from china, but if they are no good i might even put a franjan ghetto food tray reflector on it. :lol:
 
PICOGRAV

PICOGRAV

Well-Known Member
jimjim2609 said:
This is my latest diy creation. It has 10 x Cree XTE warm white leds and 4 x 10w red:blue chips. The 10w chips run 8 x 3w 660nm and 1 x 3w 445nm. They will only be run at 300mA so they should run a total of 6w each for a total of 24w. The Cree leds will be run at 1.2A. This works out that they will equate to 4w each for a total of 40w. The fan is a 70mmx70mm pc fan. It is rated at 12v 0.25A total of 3w. The power supply for the fan is a 12v 0.3A which equals 4w. I'm not to sure how long the fan will run at 4w for but I have a 120mm pc fan coming. I am unsure whether to put reflectors on the crees or just to leave them as they are. Let me know what your thoughts are and any improvements I can make.:cool:
Click to expand...
How are you powering the LED's, also show us your chamber.
 
PICOGRAV

PICOGRAV

Well-Known Member
Abiqua said:
I would think the fan would be fine at 4w, especially if it is a 12v wall wart. A lot of wall warts even regulated like to jump around [voltage wise] without full loads. So, what you have is ideal for sizing, just about the same specs, with a little extra.

I run two 80mm 12v .25amp fans on a 12v .5 amp circuit cellphone charger, run them 18hours a day no problems.

What are the measurements on the heatsink?
Drivers?

What about humidity in the grow space, how come nobody addresses that? Is it a non-issue with uncovered leads?

I Like the light. Simple and clean. Bet a few of them together would make anybody happy. Cheers.
Click to expand...
The wires are not going to corrode if that what you are talking about, jim did a good job with the soldering.

If you do want to use reflectors, they should be in contact with the LED die... could be quite complex to do that.
 
Mechmike

Mechmike

Well-Known Member
Nice job Jimjim! Those 10 watt red/blue are an excellent choice! I might have to build myself one using some of those. They have a nice balance for flowering. When put together with the warm white XTE's as you have done your light should provide a good spectral balance. You might consider adding a couple cool or neutral whites (Cree XTE, of course) to get a touch more blue. Dude! Those hanging chains are way more than you need for that light!
 
jimjim2609

jimjim2609

Well-Known Member
CaliJoe said:
Are you going to fill in the missing spectrums between 475nm-525nm that are important for carotenoids?
Click to expand...
What colour and led type would you suggest to fill in the rest of the spectrum? I have a couple diy merry panels with this spectrum, do you think running two of them as side lighting will help fill the gap?

led pattern.JPG
 
PetFlora

PetFlora

Well-Known Member
First, interesting that you mix nms with kelvin, but I get the connection. Keep in mind that PAR graphs are not accurate as to what the plant ultimately wants/needs. The WW + NW will account for that need/want. Now, when configuring the diode nm layout for this panel, what foot print will it cover? It's a good starting point. I would be inclined to replace one or two of the center chips with 630-650
jimjim2609 said:
What colour and led type would you suggest to fill in the rest of the spectrum? I have a couple diy merry panels with this spectrum, do you think running two of them as side lighting will help fill the gap?

View attachment 2808970
Click to expand...
 
jimjim2609

jimjim2609

Well-Known Member
I have run into a bit of a problem. I hooked up the driver for the crees, turned them on and all i get is 3 on the positive side and one on the negative side flashing. Does anyone know why this would be happening?
 
L

lax123

Well-Known Member
hooked up the driver for the crees, turned them on and all i get is 3 on the positive side and one on the negative side flashing
Click to expand...
I dont quite get what u r saying about pos and neg....but (12v-25v) means u Need to have at least a Forward voltage of 12V, so like a Minimum of 4whites with like 3,2Vf or 6red with 2,3Vf. Otherwise the Driver wont be stable in Output and flashing occures.
 
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