What did I break?

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TyBreaker
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Antenne wrote:
But you get (probably) the same result (1 Mode) when you overdue the pencil trick mod on the capacitor. Cleaning the C will bring it back to normal if nothing else is damaged.

I cleaned the pencil lead off for the second driver pic, just so that you all could see that it didn’t look burned.

Before the 1 mode issue happened, I was getting all 5 modes, with the highest putting out 2.2 – 2.3 amps. It was really pretty decent for implementing such quick mods. Now, I’m getting the one mode @ about 1.2 amps

TyBreaker
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wight wrote:

Short Pin 4 to GND. Here is how to do pin numbering – http://www.evilmadscientist.com/2010/basics-finding-pin-1/

If shorting Pin 4 to GND does not increase current it is most likely that the MOSFET is damaged. If shorting that way increases current then you’ve upgrades your 1-mode flashlight to a higher drive current – the modes IC is probably dead.

Sorry Wight, one question. To ground pin 4, do I wire the pin to the outside edge or maybe to the dot above the letters “yn” ?

wight
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TyBreaker wrote:
wight wrote:
Short Pin 4 to GND. Here is how to do pin numbering – http://www.evilmadscientist.com/2010/basics-finding-pin-1/ If shorting Pin 4 to GND does not increase current it is most likely that the MOSFET is damaged. If shorting that way increases current then you’ve upgrades your 1-mode flashlight to a higher drive current – the modes IC is probably dead.
Sorry Wight, one question. To ground pin 4, do I wire the pin to the outside edge or maybe to the dot above the letters “yn” ?
The pad you asked about is BAT+, so do not use that. LED- and GND are the same in this driver. You may wire to the GND ring or LED-.

Also, please measure the nearby resistor which has topmarks “103” with your DMM. Use 20k ohm mode. You should see somthing between 9k and 11k. Significantly lower than that and it may be a problem.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

ImA4Wheelr
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Congrats on your new mods.  Not sure if this will help you.  O-L has some good info on your driver.   Link in his pic below:

TyBreaker
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Thanks Wight, I’ll give that a shot.

ImA- nice thread, thanks! OL is offering a great deal there. It also gave me some ideas…

WarHawk-AVG
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TyBreaker wrote:
wight wrote:
Do you own a DMM? I will help you troubleshoot if are willing to take some measurements.

Also, please post a macro of the LED emitter.

Hi Wight, thanks for the offer; I appreciate it. Even if I did fry something to the point of no return, I’ll sure learn alot from you guys. Here’s the emitter (click for full size):

Right off the bat, emitter has twisted around on the star..bad juju

gonna have to unsolder the emitter, and reflow back to the star, now would be a good time to get a copper sinkpad/noctigon

That is a XM-L (green around the emitter and 3 internal leads, they point to the – side) the XM-L2 has silver around the emitter, only 2 leads and point to the + side)

Disregard…I see you put on a noctigon…good choice Wink

TyBreaker
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Hey WarHawk,

This was actually very informative. I didn’t know how the LEDs were supposed to be oriented. Very interesting.

I haven’t had time to follow Wight’s suggestion yet, but I will try grounding that 4 pin and see what happens. Will follow up as soon as I can, probably after this storm rolls through New England.

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