Diode and res mod on 105c

Flashlight Modding and DIY Parts
8

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)

9

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!

10

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

11

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.

12

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

13

AMC7135s will throttle current when getting too hot

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

14

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

15

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

16

Thanks sir

17

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?

18

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.

19

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

20

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.






21

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)

22

Full power

Powered Off

celling bounce

23

Told ya flashlights are addictive :wink:

Great job on your very first mod!

24

I actually just ordered 2 of the purple EFEST batts. I picked up the fire ones cause people said they we’re good batteries.

25

cool cool…caveat emptor and all that

26

Thanks for the pics. Nice mod. How long can you hold the light when running full power?

27

Very True.

I have let the light run for a few min’s and it’s fine at full power. it does start to get warmish. I’ll have to tun it on and just let it run see at what point I can’t hold it anymore.