COB wiring help

Me and my buddy have been watching lots of diy cob builds (growmau5, greengene) for a little while now and he finally decided to go ahead and go for it and bought:
12 cxb3590s with the solderless holders and lenses
2 meanwell hlg 320-2100b
some potentiometers from amazon
canopy substrate with pin heatsinks from rapidled
some wagos, wire, powercord, thermal pads.
pretty much everything besides enough screws from rapid and they forgot our wire
went over to our hardware store to get some and grabbed some 16 gauge stranded wire for cars, rvs, etc
came back wired it up. plugged it in. no light. one of the circuits hooked up to one of the drivers looked like some of the leds were starting to light up, but just barely. the other side nothing. so im thinking ive got bad connections with the stranded wire or the potentiometers suck, or a mix of the two. I made a horrible diagram in paint thats included so maybe we screwed up there. when i head over there ill try and take some pictures. hopefully someone can help!

Try putting 4 cobs in series on one of those drivers and see what happens.

Cxbs at 36 volts x 4 = 144v. Hlg 320 2100 = 76 - 152 volts

Cxbs at 36 volts x 6 = 216v will not fit the hlg320 2100 as it max voltage is 156 volts

If you have already purchased the drivers, you can add 2 parallel strings of 3 COB's in series to a HLG-320H-C2100B, but then they only run with 1050mA per COB (about 37w).
12* 37w = 444w total.
Otherwise you need a HLG-320H-C1400B for 6 COB's in Series.
Easier is to get another 4 COB's, do 4 strings of 4 COB's and wire each two strings in parallel to your existing drivers.
This should max-out each driver to around 300w for 600w total.
16x 37w = 592w

It depends on your area how much power you need. 35-40w per sft. is adaquate..

Moflow said:

Cxbs at 36 volts x 4 = 144v. Hlg 320 2100 = 76 - 152 volts

Cxbs at 36 volts x 6 = 216v will not fit the hlg320 2100 as it max voltage is 156 volts

Click to expand...

Wow im an idiot. I knew it was something simple i wasnt reading or was doing wrong. We need to grab another driver to power all 12 cobs

xmbc13 said:

Wow im an idiot. I knew it was something simple i wasnt reading or was doing wrong. We need to grab another driver to power all 12 cobs

Click to expand...

See post above! You can use this set-up, but only 450w(3 in series, 2 in parallel or 3s6p-circuits). You can change the drivers to the 1400B version(6 in series) or you can buy another 4 COB's and use the exsisting drivers(4s2p) with two strings of 4 COB's on each driver.

Use Wago connectors to connect the dc circuit to your driver, there are 2, 3 and 5 slot Wago's which are great for series or parallel connections.

You can apply the same sketch to a 3s2p circuit, then it is 3x 34.5v, but you get only around 220w of each driver.