LED flicker, possible driver issue?

[hehehemann]

Thought I would come back to this thread with the latest.

I eventually bought a new driver, same as I was using but I still dont get any light. I have made four of these cob lights now and of the four after one year of use two have stopped working. Replaced the drivers but still no light so could it be one of the cobs leds thats no longer working and would this cause all of the lights to not come on?

 

[Nugachino]

Check each part with a multimeter.

 

[hehehemann]

I will do some reading as I dont know much about multimeters. Making these lights is the easy part

I figured out why one of the lights stopped. The first LED had fried, the screen (yellow) of it looked like shattered glass effect and I noticed the heatsink thermal paste had dried up and the led had probably popped itself right off the contact with the heatsink. (I used the alpine 11 plus that came with a pre applied heatsink. I will promptly clean and replace the other pastes with some arctic silver I have for my CPUs)

 

[hehehemann]

Ended up doing some trial and error with the parts I have. It was just that one LED that had over heated and stopped the rest of the line from lighting. The other problem for the second light set up was the driver being faulty and wouldnt send enough power down the line of cobs.

All sorted, going to get a new cob and driver to replace the faulty parts.

 

[nfhiggs]

Thought I would come back to this thread with the latest.

I eventually bought a new driver, same as I was using but I still dont get any light. I have made four of these cob lights now and of the four after one year of use two have stopped working. Replaced the drivers but still no light so could it be one of the cobs leds thats no longer working and would this cause all of the lights to not come on?

If they are running in series, Yes one emitter could cause all to not light up.

This is one reason I do not use series connections.

 

[FREEK1]

I have one but honestly dont know how to use it other than testing if a wire is a positive or negative. I'm still learning the electronics side of things.
What settings do I put the voltmeter on?



Thats what I'm thinking too. Oh well, its lasted 18 months and plenty of quality nugs in that time

some of mine have lasted 6 years. First one went at 4