What do I need to test my DIY cob build for output/efficiency?

alesh · Sep 25, 2015

littlejacob said:
Bonjour
Buying a kill a watt gonna help you know how much power you give to your girls and may help you in your grow!
I bought one a while ago on ali cause they are hard to find at decent price in France!
Next thing I will buy it's a little driver for 1 cxb 3590 36V @???? I hope I could find a very low mA one...less than 100mA to be able to watch the dies and check if they all have the same intensity...cause even a 10% of 1400mA so normally 140mA it is impossible to watch the dies...at least for me...and I need my eyes to work...lol
Have a great day ★

Get a welding helmet or an old photographic film or you can gut a floppy disk to check the dies. I'm sure there much more choices.

Al Yamoni · Sep 25, 2015

alesh said:
Get a welding helmet or an old photographic film or you can gut a floppy disk to check the dies. I'm sure there much more choices.

My buddy has a few welding masks, I think he even has a sheet of that stuff he used to get a rad look at a solar eclipse. Thanks for the suggestion.

littlejacob · Sep 25, 2015

Bonjour
Thanks too.my friend...
I found a very cheap drivee on ali to check the dies!
It is because I saw a vid where you see that the dies of a chip do not have same intensity when driven very low Amp...it is not possible to do at higher Amp...but I will try with soldering mask (welding helmet sorry...)
Have a great day ★

Al Yamoni · Sep 25, 2015

One more question.. Can a cob itself cause flickering due to damage or a faulty chip??

Al Yamoni · Sep 25, 2015

It is flickering still.. I am thinking of replacing all of the chips for the new cxb's (these are cxa's) That will be expensive so I would like to mess with this a bit more first..

SupraSPL · Sep 25, 2015

Sorry to hear that man, must be very frustrating.Maybe it would be possible to skip a COB one at a time to see if there is a connection in one of the holders causing the problem?

Al Yamoni · Sep 25, 2015

SupraSPL said:
Sorry to hear that man, must be very frustrating.Maybe it would be possible to skip a COB one at a time to see if there is a connection in one of the holders causing the problem?

Would I just bridge the positive and negative from one driver at a time?

Al Yamoni · Sep 25, 2015

Al Yamoni said:
Would I just bridge the positive and negative from one driver at a time?

I would actually need to rewire them in a series, just leave one out. The bridge thing wouldn't work right? EDIT: would be much easier, excuse the stupidity if this falls into that category...

Al Yamoni · Sep 26, 2015

SupraSPL said:
Flickering can be cause by an overheated COB (air gaps under the COB), intermittent connection particularly with ideal COB holders if stranded wire was used, solder joints shorted to heatsink, and in this case very unlikely but could be caused by a faulty driver.

If the cob was overheated it becomes "destroyed" in my case what could be causing the flickering issue? And it could also be the reason that my light is only drawing less than 35w?

orangeade5 · Sep 26, 2015

You should already have this wired in series, not parallel, but you can wire it to leave out one cob at a time and it will be fine.

littlejacob · Sep 26, 2015

Bonjour
So they were in paralel?...
Is everything okay now...
Just skip the one who is dammaged...and try with the 3 left...
Good luck my friend

What do I need to test my DIY cob build for output/efficiency?

alesh

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Al Yamoni

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littlejacob

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Al Yamoni

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Al Yamoni

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SupraSPL

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Al Yamoni

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Al Yamoni

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Al Yamoni

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orangeade5

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littlejacob

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