U5 Cree L�D spotlight modification
 

Hi All.

I hope this is the correct or best place for this post.

I have bought a U5 cree LED spotlight from a Chinese website (Bang....)

http://i281.photobucket.com/albums/k...450/u5cree.jpg

I see from many other users on various forums that it has the annoying high, low, strobe effect associated with many Chinese Cree torches.

I (with a friend at work) have looked at the guts of one of these lights to spot what causes the three modes and how to "fix" it to one of them (not the strobe obviously).

It didnt take too long to spot the PWM controller and fix the light to a permanent high output. So no more low or strobe effects!

Its a simple fix and all you will need is an 0805 chip 10-12k resistor, soldering iron and (depending on how you work) thermal compound.

I wont cover the strip of the light. Its simple enough but if people want a full instruction sheet i will put one together.

Simply remove the PWM controller (U2) and solder the chip resistor to pin 1 and 3 (shown below).

Reassemble the lamp and Roberts your mothers brother.

Hope its of some help.

http://i281.photobucket.com/albums/kk208/HOG1450/U5.jpg

http://i281.photobucket.com/albums/k...450/U5_mod.jpg

Thanks for sharing this post. I've searched the internet for a very long time but never found any usefull info about removing the strobe function. And now I find it on my favorite forum.

But, unfortunately, the lightbrackets are of a very poor quality and after about 1000 km one of them decided it was time to take its own way and fell of the bike. So I replaced them with Shin-Yo lights.

I opened up my second lamp today to repeat the operation and found A) a plastic not glass lens and B) a different board!

Never fear. The component was still marked U2 and the same modification worked faultlessly.

http://i281.photobucket.com/albums/k...OG1450/u52.png

http://i281.photobucket.com/albums/k...OG1450/u53.png

Hmm...thought I'd found a solution to my identical problem when I found this thread, but no...seems they have changed the circuit board again. Mostly the same components but they have turned the U2 chip 90 degrees, either to the left or to the right...any clues?


http://i77.photobucket.com/albums/j5...t/IMG_5376.jpg

this guy is onto something but putting it through google translator didn't offer anything concrete
http://mazped.com/2015/11/08/bagaima...-pada-cree-u2/

Thanks!

Actually I think that link might be helpful...it's in indonesian, and it SEEMS that removing the whole U2 chip might do the trick, but he did not solder in any new components either...I'll keep you posted, I'll try to show it to someone who actually know something about electronics...:D

Modifying the lights has not been my top priority but yesterday I finally got to it.

Tried connecting current and connecting different legs on the U2 chip first. At best the high beam came on just about every time, but mainly soldering some of the legs together would only screw up the sequence.

Then I decided that I will never use the lights if they do not work only as high beam an pulled off the chip altogheter, and voila: only high beam left!

That's brilliant news, I can get on with getting mine sorted now.

Hi Guys

Just to back up what Matias has posted. I've just removed the u2 chip from the light and it works.

http://i64.photobucket.com/albums/h1...55576ECECF.jpg

Thanks everyone :040:

U5cree
 

yep, I did the same; just flicked the U2 chip off with a screwdriver and now have main beam only. Pretty good too....for �17.50!