DIY with Quantum Boards

numberfour

numberfour

Well-Known Member
Day 35 for these Quantum Loving ladies :weed:

Sour Larry Pebbles - Thunderfudge Genetix
slp3.jpg

Lightsaber - Exotic Genetix
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Lucky Charms - Bodhi (day 36 for this one)
luckycharms - Copy.jpg

Disco Biscuit - Underground Originals (UGORG)
disco - Copy.jpg

First run with these Quantum Boards (304's @3000k). My usual strains are louder and looking bigger so far, drivers are dimmed on the 4x 250w XL boards (actual drawn unkonwn) but using less watts than my normal 1200w for this space.
 
InTheValley

InTheValley

Well-Known Member
smokebros said:
My question isn't quantum board related but I am indeed a quantum board owner. Posting this here instead of starting a new thread...

I'd like to attempt my first COB build and I've put together a shopping cart of items. Can some of bright minds on RIU advise me of any potential hazards for this setup? Beside the frame (which I will build myself), am I missing anything in my shopping cart?
Click to expand...
Yeah, Looks like your missing 4 more quantum boards, ')
 
legalcanada

legalcanada

Well-Known Member
whats the max temp its safe to run at? ive found sitting the drivers on top of the heatsink causes it to get fairly hot over the day (4 304s, 2 drivers on slate 5) and thats with the drivers turned all the way down.. going to check numbers with my IR thermo today but the top of the heatsink was too hot to touch for very long anyways by the end of the day
 
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Humple

Humple

Well-Known Member
Help me out, guys. Per someone on another forum, if you go beyond 2 boards, QB120s shouldn't be connected in series? Per HLG's website, you can wire up to 10 in series (Molex version, of course). Here's the quote:

"What they told me was, The conductors that "jumper" across these boards,from one end to the opposite end are TOO SMALL to handle the load of any more than ONE additional board feeding off of them at a time...So ,that "daisy-chain" feature is WORTHLESS for stringing-up additional boards...Only safe for one additional board.
Oh, And those connectors on the boards are connected by a Parallel circuit , (+ to + ) ( - to - )"

Not trying to call him out or anything like that. Just want to be sure I'm not making a mistake by planning 4xQB120s in series.
 
pop22

pop22

Well-Known Member
The claim is based on misunderstanding. With the pin and socket connector, you can't use it for for series connections, its not designed for high voltage. You can do multiple parallel boards if you can find a high amp 24 volt driver, such as 2 or 3 on a 24V, 5 amp driver. The wire size has no bearing on this however.


Humple said:
Help me out, guys. Per someone on another forum, if you go beyond 2 boards, QB120s shouldn't be connected in series? Per HLG's website, you can wire up to 10 in series (Molex version, of course). Here's the quote:

"What they told me was, The conductors that "jumper" across these boards,from one end to the opposite end are TOO SMALL to handle the load of any more than ONE additional board feeding off of them at a time...So ,that "daisy-chain" feature is WORTHLESS for stringing-up additional boards...Only safe for one additional board.
Oh, And those connectors on the boards are connected by a Parallel circuit , (+ to + ) ( - to - )"

Not trying to call him out or anything like that. Just want to be sure I'm not making a mistake by planning 4xQB120s in series.
Click to expand...
 
ganjamystic

ganjamystic

Well-Known Member
Humple said:
Help me out, guys. Per someone on another forum, if you go beyond 2 boards, QB120s shouldn't be connected in series? Per HLG's website, you can wire up to 10 in series (Molex version, of course). Here's the quote:

"What they told me was, The conductors that "jumper" across these boards,from one end to the opposite end are TOO SMALL to handle the load of any more than ONE additional board feeding off of them at a time...So ,that "daisy-chain" feature is WORTHLESS for stringing-up additional boards...Only safe for one additional board.
Oh, And those connectors on the boards are connected by a Parallel circuit , (+ to + ) ( - to - )"

Not trying to call him out or anything like that. Just want to be sure I'm not making a mistake by planning 4xQB120s in series.
Click to expand...
not sure about series, but you can run 4 qb120s in parallel on an hlg-240h-24... $57.80 on arrow with free overnight shipping..
 
nfhiggs

nfhiggs

Well-Known Member
619kt619 said:
where are your calculations? to say that voltage drop is great does not quantify nor give legitimacy to your claim. I ran the numbers in a calculator and I saw a drop of 2 volts out of 122 total at 50ft for DC. so by these metrics 2/122 is great?
Click to expand...
This is highly dependent on wire gauge and amount of current. Voltage drop over 50 feet of 18g at 5A is a lot higher than 14g at 2A for example.
 
nfhiggs

nfhiggs

Well-Known Member
Humple said:
Help me out, guys. Per someone on another forum, if you go beyond 2 boards, QB120s shouldn't be connected in series? Per HLG's website, you can wire up to 10 in series (Molex version, of course). Here's the quote:

"What they told me was, The conductors that "jumper" across these boards,from one end to the opposite end are TOO SMALL to handle the load of any more than ONE additional board feeding off of them at a time...So ,that "daisy-chain" feature is WORTHLESS for stringing-up additional boards...Only safe for one additional board.
Oh, And those connectors on the boards are connected by a Parallel circuit , (+ to + ) ( - to - )"

Not trying to call him out or anything like that. Just want to be sure I'm not making a mistake by planning 4xQB120s in series.
Click to expand...
Depends on if you are running them in series or parallel. Series is not a problem, but daisy chaining in parallel puts a large current load on the first board's traces.
 
K

keepsake

Well-Known Member
The pictures in this thread has convinced me to go QB instead of COB.

My question now is:

HLG 550 vs 2 units of HLG 320w XL QB kit

HLG550 = 515 watts = $1049
2 x HLG320 = 640 watts = $1000

HLG550 has the 304 boards.
HLG320 uses 288 boards.

I don't know anything about those boards or efficiency so what do you guys suggest?
I would DIY but all the components are out of stock.
 
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