DIY with Quantum Boards

Budzbuddha said:
Quick question .... Can the 120s ( pair ) be daisy chained ( molex to molex ) and powered from one driver ... If so which would you recommend ?

Looking at throwing my 4 288s with dual 120s in center .... Run the 120s for early stages then full rig power for rest of grow .....

And will Amazon get supplied as same time ... Stock says unavailable.
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I've been running 2 qb120s in series off a hlg-120-48b. Works great for me. I posted this pic a few pages ago, but here it is again...
I have a pair of 3000k and pair of 4000k and love it for my veg tent. But easy enough to hang for side lighting if I want too (which was originally my plan when I purchased them, such a versatile board). Hope that helps some.
 

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Hey,
Day 47f, thinking about chopping around day 65.
Had another round of defoliation at day 42, except the back row which I couldn't reach. Still not sure on the number of plants for the next run, might try 12 instead of 20.

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Happy growing all
D.
 
Fired up my 4 qb 288's last night for their first day. I did a DIY build so each board is on a separate Heatsink. This is my first time ever using LED's and the top of the heatsink got ALOT hotter than I would've imagined. I lined up the ducting from my 8inch inline hurricane fan so that it was blowing across the top of heat sinks the best I could but even with that I could hold my hands on the heatsink for about 3 seconds before it go to hot. Is that normal?

I bought my heatsinks from Heatsink USA. after waiting for over 2 months for them to come back in stock at HLG
 

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I am wondering if it is possible to run 2 boards requiring a different forward voltage to the same driver in series.

For instance, is it possible to run a qb120 (24v) and a qb132 (36v) in series from the same driver?

Is it just a matter of total voltage?
 
loadansu said:
I am wondering if it is possible to run 2 boards requiring a different forward voltage to the same driver in series.

For instance, is it possible to run a qb120 (24v) and a qb132 (36v) in series from the same driver?

Is it just a matter of total voltage?
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Yes, that can be done. As long as both run ok on the same current. If one requires a higher current level than the other then its not going to work well.
 
Norml56 said:
Fired up my 4 qb 288's last night for their first day. I did a DIY build so each board is on a separate Heatsink. This is my first time ever using LED's and the top of the heatsink got ALOT hotter than I would've imagined. I lined up the ducting from my 8inch inline hurricane fan so that it was blowing across the top of heat sinks the best I could but even with that I could hold my hands on the heatsink for about 3 seconds before it go to hot. Is that normal?
I bought my heatsinks from Heatsink USA. after waiting for over 2 months for them to come back in stock at HLG
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Post 2 on this thread. I tried the same heatsink and it got hot. Fins too close and it did not help much with cooling.
4 qb 288's @ 1400ma is the most you can do with that heatsink before it gets hot.
https://www.rollitup.org/t/diy-with-quantum-boards.927159/#post-13147205

If you can hold it for 3 seconds then you are fine. you are probably near 55-60C
email HLG if you need heatsink. I will try to help.
 
robincnn said:
Making QB 288 3000K in USA since October. QB 288 4000 next month
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The machines we had (I think they were Samsung?) at the company I worked at from 2000-2010 worked a bit differently. The placement head was stationary and the machine moved the PCB around under it as it pulled the parts off the reel. Population speed was 2-5 times faster than the moving head machines they replaced. For a single part board like the QB288, it could build it up in about a minute.
 
nfhiggs said:
The machines we had (I think they were Samsung?) at the company I worked at from 2000-2010 worked a bit differently. The placement head was stationary and the machine moved the PCB around under it as it pulled the parts off the reel. Population speed was 2-5 times faster than the moving head machines they replaced. For a single part board like the QB288, it could build it up in about a minute.
Click to expand...
The pick-up head was actually a disk with either 8 or 16 (I can't remember which) vacuum operated pickup points, and it spun around, picking up a part from the reel, and rotated around to place it on the board as it moved into place. So it was actually holding on to several parts at all times, even when it changed to another reel. The reels were on a moveable rack, and it just moved the next reel into place as it needed. The thing was wicked fast to watch, especially when placing a lot of the same part close together.
 
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