Getgrowingson
Well-Known Member
Measure voltages and post them here. After turn the light off and do the same thing but unplug your light and check the resistance of each one. It's the omega symbol on your multimeter.
Understood, and well stated. Thanks a million. I've learned a lot today, that is for surely a positive.You need a 100K pot to get the dimming function working. They are very cheap on ebay. If you go without a POT (dimming wires should not be touching) you will get full current ~1.1A.
Skipping each COB/holder one at a time might uncover the problem and probably the next logical step. You can run a single CXA3070 on this driver for testing but I do not recommend it because the driver can push at 190V and if there is an intermittent connection the overvoltage can kill a healthy COB instantly. I killed a CXA3070 testing it by itself on an HLG-185H-C1050A before I understood that.
I got zapped at 286V from an HLG-185H-C700B that was powered off. No harm done but that is how I learned how the drivers push as hard as they can when they dont see a load. It takes 15-30 seconds for that voltage to fall back down when there is no load and even after the power is switched off. As you can imagine, sudden exposure to 190V would be bad for a 36V COB.
Thanks brotha!
So put the meter on the 10A and read from the positive and negative points closest to the driver?Hmm. Seems good on that end. Sounds like your driver is putting out low current. Which would explain your voltage being so low on each cob. What is your meter rated for current wise? Should have a rating in A. If it's around 5A I would try and do a current reading of your string. This would prove your having driver issues
@SupraSPL or @Getgrowingson or anybody that can explain this to a caveman like myself?Measuring Current
Reading current is one of the trickiest and most insightful readings in the world of embedded electronics. It’s tricky because you have to measure current in series. Where voltage is measure by poking at VCC and GND (in parallel), to measure current you have to physically interrupt the flow of current and put the meter in-line.
Word. Looks like I am learning!Yes that is correct