so did you start the work on the sofirn 2700 kit yet?
Any time frame when the shop will be open buddy ?
From post #1374:
Notice: on 28th Dec a quite strong earthquake (for this area at least) with 6,4 magnitude struck Croatia, epicenter was just about 6km from my business address which caused some damage to building, so building is closed for safety reasons.
Because of this, store opening is postponed until further notice.
Good to hear you’re OK. I was worried. Take your time 
Safety first. Flashlights can wait. Glad you’re okay.
Good luck with the repairs, I hope you had some insurance for this. You were very unlucky to have been so close to the epicenter 
Sorry to hear about this. I hope you are doing ok and that the damage will not affect you too terribly much.
Sorry to hear that :zipper_mouth_face:
I hope you and your stuff are safe ! I’m sure we’ll be here to fill the orders when the store opens 
Take your time and stay safe :+1:
Hope that store will be open soon and no damage to people and stuff.
I am facing problem with LD-4a driver in S2+ host with nichia 219C led. I set driver to 4Amp constant current and I get about minute or two runtime till internal temperature protection shuts down the light. By then light is about 50-60 degrees C hot.
Manual says about using silicone sheets inside driver pill.
Will these silicone cubes from kaidomain work? http://kaidomain.com/S024143-DIY-1cm-x-0_5cm-Thermal-Conduction-Silicone-Rubber-Cubes-5-pcs
That will work. I had a similar problem in a S3 host. Squeeze as much in as possible.
I just hope that combination of 219C and 4 amp constant current is not a problem. Will order these cubes and try.
Thanks
I think the diffrence between 219C Vf and cell voltage is too high. And the issue will be more pronounced at lower modes because of less cell voltage sag.
I experienced that issue with a Luxeon V. And with the 3V XHP50.2 it was even more pronounced. Then I tried XP-L HI, No issues at all…
The silicone cubes cured the problem for the Luxeon V but the XHP50.2 Vf is so low that it still caused the driver to overheat after about 5min on lower modes with a fresh cell.
Thanks Kevin for answering to these questions to dropman.
3-4Amps is usually where power dissipation in driver is max.
Adding some thermally conductive material like those silicone cubes helps a lot, but just putting piece of cube in pill wouldn't help much if cube is not in good contact with both pill bottom and fet top surface.
This means amount of silicone pieces should be such that you feel slight pressure during driver retaining ring installation.
Other solutions is to use lower power/higher capacity batteries (30Q doesn't make sense for 4Amps), not using spring bypasses etc.
Does anyone have a link to the UI for the LD-A4 driver? I just discovered I have 2 of these drivers tucked away and never used them. I’m trying to figure out how to set the amperage on the driver. Thanks!
Google: ld-4 datasheet
and click on the first link.
led4power and Yantar. Thank you so much!
My convoy l2 with a ld-4 is acting weird.
If I want to change modes it flashes once and it remains the same brightness level but after one second it drops power, or increases if you go from low to high.
I looks like I only have 2 modes now.
I’m not sure what the exact driver is, I also have a lighted tailcap installed.
Seems like you are in programming mode… do 10 to 12 consecutive half taps, the light will then turn off. Should be fine then. I highly recommend reading the manual thoroughly.