Citi 1212s and hlg-320h-c700

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George2324

Well-Known Member

Apr 15, 2017

• #1

when working out how many cobs can run on this driver do we use 36v or 35v?

Basically wanting to know if it's safe for me to run 12 citi 1212s at 0.7a on these drivers?


Cheers

 

RandomHero8913

Well-Known Member

Apr 15, 2017

• #2

You're good.

 

CobKits

Well-Known Member

Apr 15, 2017

• #3

its closer to 34V at 700 mA

you should solder those cobs as there arent any CLU048 holders rated for 400V

 

xX_BHMC_Xx

Well-Known Member

Apr 15, 2017

• #4

CobKits said:

its closer to 34V at 700 mA

you should solder those cobs as there arent any CLU048 holders rated for 400V

Click to expand...

Give up on parallel already?

 

xX_BHMC_Xx

Well-Known Member

Apr 15, 2017

• #5

Citizen has an excel sheet that will tell you exactly how many volts they need at any amperage and Tc. Don't have a link, but search around a bit, I'm sure I found it here.

 

CobKits

Well-Known Member

Apr 16, 2017

• #6

xX_BHMC_Xx said:

Give up on parallel already?

Click to expand...

Just advising OP on the driver he asked about. of course in my opinion parallel would be a better setup in that case but he sounds like he has his driver picked out.

 

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George2324

Well-Known Member

Apr 16, 2017

• #7

I'm soldering the cobs. However, if you can recommend a cheaper driver for parallel I'm all for it. I need 27 drivers with my current setup if I can use parallel I'd prefer it

 

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George2324

Well-Known Member

Apr 16, 2017

• #8

Just received my 320 citizen 1212s.

Every parallel driver I've found ends up with a few cobs left over and I can't work out how many to put on each driver

 

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George2324

Well-Known Member

Apr 16, 2017

• #9

I've just found the HVG-320-36A

I could do 12 cobs per driver. Do you think that would be better?

 

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Manfromthenorth

Well-Known Member

Apr 16, 2017

• #10

Cobkits has a 600 watt driver 36v I thinks a b searies so you can remote mount dimmer. It will drive 20 1212 at 800ma.

 

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George2324

Well-Known Member

Apr 16, 2017

• #11

That's the hlg-600h version right?

I consider using these however I'd need 16 of them.

That is ok but 16 would be 9600w.

Is there a way for me to wire all of them into a single pot and put a resistor to make the minimum 10% and the maximum 85% anyThing over 85% will possibly blow my dedicated breaker.

 

CobKits

Well-Known Member

Apr 16, 2017

• #12

George2324 said:

Is there a way for me to wire all of them into a single pot

Click to expand...

yes it should use a 100k/16= 6.25k pot if you can find that

 

sixstring2112

Well-Known Member

Apr 16, 2017

• #13

CobKits said:

yes it should use a 100k/16= 6.25k pot if you can find that

Click to expand...

what if he or anyone used that 0-10v pwm dimmer jerry sells? im wondering if you can use 1 of those type dimmer switch to dim multiple drivers ? also could he just use a 10k pot with a 3k resistor in line ?

 

sixstring2112

Well-Known Member

Apr 16, 2017

• #14

i guess its a 1 -10v dimmer and has a max wattage of 750w so https://kingbriteled.en.alibaba.com/product/60581004377-0/1_10V_dimmer_switch_for_LED_Light.html?spm=a2700.8304367.0.0.U3KMc0

 

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George2324

Well-Known Member

Apr 16, 2017

• #15

CobKits said:

yes it should use a 100k/16= 6.25k pot if you can find that

Click to expand...

Would I be able to wire a resister in somehow infront and behind the pot to limit the pot to above 10% and below 85%?

 

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George2324

Well-Known Member

Apr 16, 2017

• #16

Do I need a 6.25k pot or can I use a 6k? Can't find a 6.25 anywhere

 

CobKits

Well-Known Member

Apr 16, 2017

• #17

6 would work, get one or two 250 ohm resistors and add if needed. a wattsup wall meter wil help you dial it

 

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George2324

Well-Known Member

Apr 16, 2017

• #18

What do the one or two 250 ohm resisters do and where would I put them? I'm pretty new to all the calculations for r1 + r2 etc

 

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George2324

Well-Known Member

Apr 16, 2017

• #19

Also I've found this on eBay:

http://vi.raptor.ebaydesc.com/ws/eBayISAPI.dll?ViewItemDescV4&item=191786334733&category=181913&pm=1&ds=0&t=1492374549624

It says it's rated for 2w though. Does the entire wattage flow through this dimming leads or is 2w enough?

 

CobKits

Well-Known Member

Apr 16, 2017

• #20

resistance is additive in series.
6k+250+250 = 6500

the reason i said get 2 resistors is your pot might be like 5.8K