DIY with Quantum Boards

ChaosHunter

ChaosHunter

Well-Known Member
Few progress shots of the girls, lots of bud sites all the way to the bottom. The girl on the left has a deficiency of some sort. There both in FFOF but the soil on the left is off.



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There loven the light
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Bottom of plant above, things look good all the way down.
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Waiting on deck is a femed, photo Papaya I plan to scrog and maybe take cuttings if all goes well.
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These are the girls when they first went under the Quantum's on Dec 17
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thccbdhealth

thccbdhealth

Well-Known Member
what would be the recommendation for a 4'x4'

what about coupling these with a 315 cmh, in a 20"x20" hood in the center of the 48"x48" tent
 
ttystikk

ttystikk

Well-Known Member
Budzbuddha said:
Yep those little kung pow chicken led drivers are in rare form .....

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Click to expand...
You have dark bars in your pics. When that happens under HID, it's due to the sine wave curve of AC power delivered to the lights. Since these are DC driven, I'm wondering what's up?

@robincnn ? Any ideas? Might it have something to do with his cheap driver?

One can see from the posting directly below that Meanwell drivers don't do this.
 
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dandyrandy

dandyrandy

Well-Known Member
ttystikk said:
You have dark bars in your pics. When that happens under HID, it's due to the sine wave curve of AC power delivered to the lights. Since these are DC driven, I'm wondering what's up?

@robincnn ? Any ideas? Might it have something to do with his cheap driver?

One can see from the posting directly below that Meanwell drivers don't do this.
Click to expand...
Maybe the driver has a bit of trouble regulating the current?
 
dandyrandy

dandyrandy

Well-Known Member
Pulse width modulation is a name for the type of regulation used. The drivers are just switch mode power supplies with CC regulation. Or not. Normal AC to DC supplies use a 60 cycle transformer and rectification to make DC. The ripple will be 60 or 120 htz. But that low of a frequency requires a lot of iron for the transformers. And heavy and big. But if we rectify the incoming AC and then "pulse" a 10000 cycle transformer with electronics then rectify it and control the number of pulses to regulate the DC. The transformer doesn't need iron just a ferrite mixture to couple the 10000 cycle through the transformer. Much smaller much more efficient. Now if the output of the supply has AC riding on it 60 or 120 cycle you would get the venitian blind look. It would be interesting to stick a scope on the output.
 
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