DIY CXB2530 3000K 80cri U2 bin (Vero Killers!)

ttystikk

ttystikk

Well-Known Member
Scotch089 said:
"As long as the heatsink is connected to the ground"

Do you mean where the ground wire is grounded when saying connected to the ground (on the metal) or it needs to be grounded to the literal....ground. (rod mounted in dirt like my dad has at his workbench)

....ground, ground........ground.

Even typed something so much that the spelling starts to look wrong..? Yea...
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Grounding wire in your electrical system. This is either the third wire in 120V or the FOURTH wire in 240V, not to be confused with the neutral in a three prong 240V dryer outlet.

I've totally been there with your brain playing tricks on you...
 
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churchhaze

Well-Known Member
I turned out the lights to check the writing for "B" to make sure digikey sent me cxb and not cxa. Of course the ideal holders got in my way.. so I couldn't read... That's not the point of this post.

I turned the lights back on and saw a fat ass lady bug crawling around on a fan leaf... I really hope there are no spider mites.. but my main point.. Don't HPS lamps kill lady bugs? Isn't that one of the main reasons they aren't effective to use against spider mites? That they'll all just die?
 
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bicit

bicit

Well-Known Member
churchhaze said:
I turned out the lights to check the writing for "B" to make sure digikey sent me cxb instead of cxa. Of course the ideal holders got in my way.. so I couldn't read... That's not the point of this post.

I turned the lights back on and saw a fat ass lady bug crawling around on a fan leaf... I really hope there are no spider mites.. but my main point.. Don't HPS lamps kill lady bugs? Isn't that one of the main reasons they aren't effective to use against spider mites? That they'll all just die?
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I've never heard of this, I've used lady bugs before for mites. They usually die off due to lack of food IME.

Where does one acquire these cob holders for a CXB3590?
 
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churchhaze

Well-Known Member
bicit said:
I've never heard of this, I've used lady bugs before for mites. They usually die off due to lack of food IME.

Where does one acquire these cob holders for a CXB3590?
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I think Newark is the best place to get them, although I'd pay a little more to reduce total number of places ordered from if possible. I'm using cxb2530 just to be clear, which has a LES diameter of 19mm, similar to vero 18.
 
REALSTYLES

REALSTYLES

Well-Known Member
churchhaze said:
I turned out the lights to check the writing for "B" to make sure digikey sent me cxb and not cxa. Of course the ideal holders got in my way.. so I couldn't read... That's not the point of this post.

I turned the lights back on and saw a fat ass lady bug crawling around on a fan leaf... I really hope there are no spider mites.. but my main point.. Don't HPS lamps kill lady bugs? Isn't that one of the main reasons they aren't effective to use against spider mites? That they'll all just die?
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yep I've seen them fly straight into them and smell like burnt popcorn lol.
 
nogod_

nogod_

Well-Known Member
They are $13 on verical for the u2 bin but you gotta buy a hunnid. Ive had them in my cart for a week and a half but i promised myself no dessert until im done with my dinner.

churchhaze said:
It looks like the price per individual cob has been reduced.

$21.00 bucks at digikey for U2 bins now. When I made this, they were 24.15 each individually!

To scale this up, cost of leds:
was $2.81/PARW
now $2.44/PARW
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AquariusPanta

AquariusPanta

Well-Known Member
churchhaze said:
As long as the heat sink is connected to ground, it should work to create a short circuit if any live wire touches the heat sink, so all the current goes through the ground and hopefully trips a breaker.
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How about the socket is grounded and bolted to the chassis, which feeds off the power from the power cord, which in turn feeds the driver(s), ultimately powering on the COB(s)?

Does that give users the same safety results? I'm thinking of just 120V AC / ~30V DC per driver @~700mA, all COBs ran on CPU heat sinks...
 
Getgrowingson

Getgrowingson

Well-Known Member
AquariusPanta said:
How about the socket is grounded and bolted to the chassis, which feeds off the power from the power cord, which in turn feeds the driver(s), ultimately powering on the COB(s)?

Does that give users the same safety results? I'm thinking of just 120V AC / ~30V DC per driver @~700mA, all COBs ran on CPU heat sinks...
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Just extend the ground from the 120v power cord your using to power your drivers ect and mount the wire to the heatsink. easy peasy

just make sure the outlet your powering them on has a ground on the receptacle lol
 
AquariusPanta

AquariusPanta

Well-Known Member
Getgrowingson said:
Just extend the ground from the 120v power cord your using to power your drivers ect and mount the wire to the heatsink. easy peasy

just make sure the outlet your powering them on has a ground on the receptacle lol
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Well uh... if there is one heat sink per COB/driver... just forget it... thank you for the input though lol.
 
Getgrowingson

Getgrowingson

Well-Known Member
Are the heat sinks attached with anything ie aluminum or metal? If so they are all bonded to some point so all you need is it attached to one provided there is some sort of connection
 
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churchhaze

Well-Known Member
I wouldn't worry about grounding sinks with 30V drivers. I don't want someone to zap themselves with 400V because a wire gets disconnected from a cob holder and pushes up against the heat sink, making the heat sink 400V..
 
caretak3r

caretak3r

Well-Known Member
I was studying the cob efficiency thread earlier. It seems to me that cxb2530s are the way to go over the 3070s. I'm not sure why more people aren't building out units like yours churchhaze.
 
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