I have got a question about a 26mm FET+7135 driver (MTNElectronics). I soldered it myself and put it in a zooming light with XHP70.2. Recently I noticed that soon after turning the flashlight on the led starts to flicker slightly. I am not sure what the reason is and how I can solve it. Is the led or the driver components responsible? Any suggestions are welcome!
I would suggest you start ruling out parts to narrow the problem.
Try some different batteries. Does this fix it? If not, then the batteries are fine and we move on.
Try no tail cap and use a jumper wire instead. Does this fix it? If not, then the tail cap is fine and we move on.
Make sure the driver retaining ring is tight.
Since it’s a 70.2 and can handle direct drive, try shorting the negative side wire of the mcpcb to ground. It will go full power. Does it still flicker? If so, it’s the led. If not, then the led is fine and we move on.
If you narrow it down to the driver then you might need to ask a driver expert what component could cause it. You could go over the whole driver with hot air to make sure all your solder joints are good.
Jason, thanks for your explanation. I got the everything wired up correctly now. I just need to figure out how to fit everything in the host now… Hardest thing is going to be to get the switch parts to fit.
How do I get the reflector in optimal height to focus the LED perfectly? What do I look for in a beam or on a white wall to see if the reflector needs to be raised or lowered?
There’s no such thing. If your looking for the highest measurements, you can adjust it for that and possibly end up with an ugly beam. It’s better to just set the height to what looks best.
There’s a lot of technical stuff you can do to adjust it, but I don’t see the point in it.
Can I short a driver throught the AMC 7135 (lexel´s bistro FET driver)? (If there will be a contact of AMC with brass retaining ring = ground?) I don ´t completely understand functionality, in this case more like polarity of driver components.
Yes, I’m pretty sure that is possible. If one 7135 is shorted by accident then there should be a minimum of 0.350 amp going through the driver and the light will not go dimmer than this.
I took a quick look at MTN E to see what he offers on that driver with ATtiny13. Besides Bistro, you can use Guppydrv Dual if you have access to it. That’s all I know, sorry.
The correct answers are to take them to either a battery bin at your local hardware store or Best Buy, or to take them to your local household hazardous waste center
I used to do a lot of laptop cell pulls, so at one point I had a 10 lb bag of dead cells. The hazardous waste center wouldn’t take it, as they said they only took household waste. I said, “This is from a household, but I know what you mean.”
I ended up taking them to a Batteries + Bulbs, and they took the cells no questions asked.