Lumintop GT micro

LED Flashlights – General Info 1 x AA / 1 x 14500 Flashlights
616

im having a problem with my micro, it was working fine and then i swapped in a sst-20 and the led was staying on all the time, i thought yeah some short somewhere maybe its the reflector but nah and then i was like well might be the led wires touching on the mcpcb or something so decided to remove the driver and replace the led wires but nah yeah still the led stays on. so i was like ok maybe the head is touching something so i took the whole driver out and powered it up and led still on always. so i dunno its beyond me at this point, any ideas would be great.

617

That is rather odd, generally that is a sign of a bad 7135 but it is strange that it only started happening after the LED swap. Generally excess heat or voltage would kill the 7135.

618

i tried to get the 2 boards apart but it seemed to difficult, i might try again and replace the 7135. would a short cause that kind of damage to the 7135 chip if i did something unknowingly? it seems to function normally during ramping and blinks where it would normally blink at the top of regulation, its got anduril.

619

A short could possibly damage the 7135 just not as common.

You will need to de-solder the brass bars that hold the PCB’s together in order to take them apart. You will need a hot air gun to do both of them at the same time I am pretty sure.

Worst case you might be able to get a replacement driver from lumintop.

620

What’s the best 14500 for a Osram 1mm^2 White Flat GT Micro?

621

I bought this ones for mine, 6A current capability and cheap as well (and in EU)

622

Where did you find the new 14500? I also have the 1000mAh one and the efest purple

623
624

look what i saw on mad max fb page… gt nano is coming soon :smiley:

625

I got the GT nano prototype the other day. The first design was not giving the output I expected so made a few changes that should improve things.

Trying to pick the LED for this light actually. The white flat is interesting but sourcing them can be hard and only CW tint.

What is the best version of the white flat model number wise to have them look for it? I loose track of all those flat LED model numbers.

626

KW CSLNM1-TG.

That is the 3030-size small die (1mm2) version that you want for a mini-thrower like this.

Mind that this led needs a different than usual centerpiece to fit the 3030-size led.

It is at least available at all the “western” sellers Mouser, Digikey, RS. And our led4power.com of course.

627

This is what LED4Power is selling

This is what Hank is selling at his store

628

Great, thanks for that. I have passed it on so we will see what they come up with.

629

I just tested the GT Micro with the known best 14500 cells on the market. The new Shockli 14500 1000 mah matches the output of the previous king of high current 14500, Windyfire 600mah but with much more capacity. Very impressive. The output with these cells make this light almost as bright as the GT Mini and D1S. The Shockli also beats Sanyo UR14500P by a large margin, which was the previous best overall 14500.

The GT Micro just became much more interesting.

630

thanks for sharing your findings!

:beer:

631

nassagus, check to be sure your emitter isn’t grounding on the negative pad at the MCPCB, a small solder ball from the re-flow can do this. Use a multi-meter to check at the bottom of the MCPCB and the negative pad, if it has continuity you need to re-flow the emitter again. :wink:

632

$26 on Amz US right now.

633


https://amzn.to/35aev9S

634

I’m trying to decide between the micro or the X5.

Basically the same price right now.

Somebody sell me on one or the other.

635

Both.

Resistance is futile.