LED controller board identification

Vespucci's picture

Offline

Joined: Oct 27, 2020

Replies: 5
LED controller board identification
October 27, 2020 - 11:25pm

Hello.

I would need some help identifying the little controller circuit board which was connected before a LED.

It is a Transom Light of a boat with a 5mm blue LED. It was connected to 12V(13.4V) and hit by a lightning surge. The LED itself was tested and is still ok but at the output of the board we have 0V.
Can somebody identify the board or the parts? 

Thanks,
VESPUCCI

 

100.TransomLED.jpg

 

100.TransomLEDboard2.jpg

 

Sourav Gupta's picture

Offline

Joined: Feb 12, 2018

Replies: 360

Can you provide a cleared picture without the blur where all the black components numbers are clearly visible?

Vespucci's picture

Offline

Joined: Oct 27, 2020

Replies: 5

Sorry, it seems they printed the numbers in black on black background... With bare eyes nearly nothing is to see. I already tried to enhance the pic, therefor it is that blury.

The first is : KJE, the resistor is: 10X, then another KJE and the last one I only can read: 12..

On Friday I will have a look at another module, I have six of them, may be I can read more on one of them.

Vespucci's picture

Offline

Joined: Oct 27, 2020

Replies: 5

Oh, I forgot the second last: MM. I read from left to right.

Sourav Gupta's picture

Offline

Joined: Feb 12, 2018

Replies: 360

It is quite difficult to find out the value. Do you have any part number of the led? So the circuit can be built.

Vespucci's picture

Offline

Joined: Oct 27, 2020

Replies: 5

Yes, i demounted the others but it is even worse... And I realized that the other LEDs are also burnt, so it makes no sense to rebuild the circuits. Only one LED survived:-)

Am I right, that the board serves for controlling the current instead of a burning resistor?

Thanks a lot for your effort and I have to apologise that I did not check the others before...

VESPUCCI

Sourav Gupta's picture

Offline

Joined: Feb 12, 2018

Replies: 360

Yes, such high brightness LEDs uses constant current and it is quite a normal topology to power such LEDs using constant current source. You can always build everything as you need. This is the power of engineering. You could easily search for high brightness LEDs and could possibly make the thing more useful than before.

Olivia Williams's picture

Offline

Joined: Feb 27, 2020

Replies: 23

I would need some help identifying the little controller circuit board which was connected before a LED.It is a Transom Light of a boat with a 5mm blue LED. It was connected to 12V(13.4V) and hit by a lightning surge. The LED itself was tested and is still ok but at the output of the board we have 0V.
Can somebody identify the board or the parts?