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Scotch089

Scotch089

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DeMoNeye said:
60cm square. 400w was a gift but I realise it's overkill.

Because it's so small would their be enough room for a solution that covers both V and F. I don't know if it possible to mount LED's into surface mounts and then swap out between veg and flower?
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Look into simple diy builds, look at SupraSPL threads. Small build will be really convenient and cheap for your space. Good luck!
 
JorgeGonzales

JorgeGonzales

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DeMoNeye said:
60cm square. 400w was a gift but I realise it's overkill.

Because it's so small would their be enough room for a solution that covers both V and F. I don't know if it possible to mount LED's into surface mounts and then swap out between veg and flower?
Click to expand...
So you aren't trying to replace a 400W, and have a 2x2 footprint.

Most people just run one spectrum through flower and veg, say 3500K. If you want a tried and true combination, search for CXB3590 and HLG-185H-C1400. There is PLENTY of information around here on it.

Unfortunately (for this site), we don't really have the ability to have updated plans or parts lists for DIY stuff, no ability to edit top posts or curate stickies, so you are stuck searching like it's 2003 or some crap. It's ghetto as fuck, apologizes for the insensitive use of the word ghetto.

Good luck, and ask any questions you want.
 
DeMoNeye

DeMoNeye

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JorgeGonzales said:
So you aren't trying to replace a 400W, and have a 2x2 footprint.

Most people just run one spectrum through flower and veg, say 3500K. If you want a tried and true combination, search for CXB3590 and HLG-185H-C1400. There is PLENTY of information around here
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OK - starting to get a handle on this now.

What sort of footprint do you get from a COB like that?
 
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DeMoNeye

DeMoNeye

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Brilliant - all I've got to do now is decide on either active or passive cooling.

Because of the size of my grow I think it's going to have to be active. I've seen lots of people on here using CPU coolers, but then you need a computer PSU to drive those. Are there any other solutions for active cooling?
 
nevergoodenuf

nevergoodenuf

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Being such a small grow, you could use over sized computer fans over your heat sink and the overhanging part of the fan can move air through your canopy. If you look through your draws, you should be able to find a 9v-12v wall plug from some old electronics. 12v @ 1 amp or more will power 2 or 3 fans.
 
Airwalker16

Airwalker16

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DeMoNeye said:
Brilliant - all I've got to do now is decide on either active or passive cooling.

Because of the size of my grow I think it's going to have to be active. I've seen lots of people on here using CPU coolers, but then you need a computer PSU to drive those. Are there any other solutions for active cooling?
Click to expand...
Yes, active cooling is simple. Cpu fans (120-140mm) are ran simply by 12v power supplies. A meanwell apv-12-12 is $5-$10 & has 1 amp of current. Usually able to run 4 120 sometimes only 2 140mm fans. Just check the specs of the fan you have and see what it needs to run
 
JorgeGonzales

JorgeGonzales

Well-Known Member
DeMoNeye said:
Brilliant - all I've got to do now is decide on either active or passive cooling.

Because of the size of my grow I think it's going to have to be active. I've seen lots of people on here using CPU coolers, but then you need a computer PSU to drive those. Are there any other solutions for active cooling?
Click to expand...
If you want passive, go passive my friend. No reason not to. Or go with a large extruded heatsink and a couple oversized fans like @nevergoodenuf said.

Basically, you can do whatever you want. 60x60cm isn't tiny, unless you are height restricted.
 
DeMoNeye

DeMoNeye

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Is it literally a case of soldering direct to the COB surface - standard lead based solder or SMD paste?



What sort of voltage/amps will that be carrying - what sort of gauge wiring?

. Do you wire them up serial or parallel?
 
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Scotch089

Scotch089

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Go to pacific lighting concepts website and it will have literally everything you need.

Look up cree cxb3590 datasheet, you can find the given voltage of an individual cob at the target/given amperage (you can multiply these 2 together to get how many watts each cob will draw, ex. 30V x 1000mA= 30w, 30V x 700mA=21w, etc etc)

Then when you figure out how hard you want to drive them/how many watts you want/how many chips you want to use to get there (< all the same process) you need to add up the total volts of all the chips together (30 x 4=120V)

You will need to find a "constant current driver" that can hold your total volts and drives the chips at the amperage you want (700, 1000, 1400mA..etc) the closer you are to filling up the full voltage of a driver the more efficient it will run.

After that it's just figuring out if you want to actively or passively cool the panel and pick a form of Heatsink (one large slab, or multiple smaller cpu style) and pick fans if you want active

These wonderful guys skipped all this for you and named the part #s you are going to want to look for, again, hope over to pacific lighting concepts and they should have every piece you need to go start to finish.

Good luck buddy

Edit; none of the example numbers I used match up in reality- I just used whole, easy numbers for examples sake

Edit II: there are holders called ideal chiplok holders thay have respective part numbers for different cobs, you'll want to find the one for your specific chip, again, plc should be a one stop shop for you @DeMoNeye
 
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Wisher2

Wisher2

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