Diode and res mod on 105c

The reflector has a 9mm hole for LED? If so, here is gasket

For zener mod, you must remove the diode (next to + LED) and insert a resistor in its place.

The zener diode (not the one removed) you have to solder as I pointed out in the picture.

Wildcat
The linear driver is good for this because you know the maximum current that goes into the LED. I plan to do it for 2 cells but with mt-g2

Thank you sir for the help, I thought those were the places I just wanted to make sure.

Suggestions as to where we can buy the zener diode at a reasonable price are welcome. More pictures of the diode would be nice.

You need a 4v3 zener diode and a 200ohm resistor in the 0805 package. Of course, you can look for something cheaper. These links are just an example.
In one picture, the zener diode has a strap. This strap should be like in the picture I pointed with an arrow

edit.
I’m not 100% sure but the zener diode can also be soldered on these empty pads

From Digikey this is what I ordered
RES SMD 200 OHM 1% 1/8W 0805 Part# 541-200CCT-ND
DIODE ZENER 4.3V 500MW SOD123 Part # MMSZ5229B-FDICT-ND

How many 7135’s can I stick on the 8 that are on the board now?

Also I looked on Digikey for the 7135’s but I am unable to find them I had to order them off FastTech. AMC7135 350mA SOT-89 (100-Pack) and AMC7135 380mA SOT-89 (10-Pack)

For xhp70 (not xhp70.2) and 2.8A it is around 17.4W. A bit warm. I would leave 8 amc and see how much the body heats up. If you decide, for example, after 15 minutes, the temperature is OK, then add amc. Remember that the LED feels different temperature than you. As for me, 10x amc would probably be too much. This is 3.5A and over 22W. But almost 3000Lm!

It gets warm running Full power. Even with it on low it gets warmish, but not to the point it unholdable. so I guess i’ll leave it at 8. thanks for the info man.

I love the fact the light get’s so hot, I seen a youtube video on this. that is why I picked this as my first light to mod. Just seeing how bright it was amazed me.

Also just so it’s on the page. I used 2 Demonfire IMR 18350 High Drain 3.7V 1200mAh

TailCap spring mod

Thanks for all the suggestions and links. Would you upload close up pictures of your work? I’d like to see the zener diode and resistor soldered to the board.

Will do as soon as I get the parts. should be here later this week.

AMC7135s will throttle current when getting too hot

just keep in Mind at 2S even the stock ones generate double heat than normal

Leviatan, How can I tell if I can put the zener diode on those pins?

if one pin has 0 Ohm to ground and the other to the 200 ohms resistor

Thanks sir

So can we use the empty pads of the stock Convoy driver like the one in the picture? Does the stock driver have the 0 Ohm pin and another for 200 Ohms?

I just got the parts, so I’ll be checking it soon to see if it can be soldered on the second set of solder pads.

Thanks. Take your time and enjoy your mod project. Looking good so far.

OK, so here is the mod done. The Diode was a bit big but it’s just connected to ground, I wonder if there is a better Diode for this. I also upgraded the power and ground wires to 18AWG.






Awesome…bad ass!!!

Nice solder job :wink:

Need some shots of that bad boy in action!

Don’t always trust those “*fire” batteries…chinesium ratings and all that…I like the purple efest ones…they usually do pretty well and are good batteries

Now you gotta learn to solder the button on the flattop batteries (pretty easy if you scuff the contact and use plenty of flux)

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