ARGH! Just smoked 1447 Cree module!

I was getting ready to go out and work on boring out my RC-F4 for an Ultrafire 17670. The two 16340 that were in the F4 were sitting there and I thought what the heck and put them in the G2 with the 1447.

There was a flash and then nothing, There is continuity between the spring and positive on top. But none from neg to the outside.

I'm trying to figure out a way to check the LED. But I'm not set up for modding or big time testing.

I have an idea about how to go direct drive but then what battery(s) would I use?

that module should handle 2X 3.6V, so its probably not something you did wrong.
You can either swap the board (if thats the bit thats gone) with one of the multitude available on DX and kai, or go direct drive, with an 18650 or 17670 (i think!). Please others correct me if Im wrong...

I don't know for sure what happened except "flash" and then nothing more.

I'm not a modder in the sense of changing boards and such. But since it is dead, I guess I can't hurt it any worse.

I think the LED itself is dead. Using continuity on a multimeter on a good light module I get the LED to glow when I touch certain places.

On this one nothing I do gets any light from it, including touching right at the solder joints by the LED.

I also used foil to make the neg of the led touch the aluminum outside of the module and nothing.

Cheap enough I guess to order up a few more.

And I have a really nice reflector left over....

I know what you mean about the faint glow, but maybe here its being fed into the short in the circuit.
To properly test the LED, unsolder one wire from the LED, wire up one of the CR123s to the correct - and + spots, and then u will know for sure.

Yeah, the other 1447 module I have won't glow either but does light up just fine.

No big hairy deal. I have plenty of other really good LED lights.

update:

Read about using a 9v battery to test. The LED itself is what is dead.

The module is ok. I cut the wires rather than unsoldered the LED.

The LED base was not thermally attached to the module anyhow.

Next time I call up stuff from DX I'm going to get three or four more drop ins.

PlayboyJoeShmoe said:

update:

Read about using a 9v battery to test. The LED itself is what is dead.

The module is ok. I cut the wires rather than unsoldered the LED.

The LED base was not thermally attached to the module anyhow.

Next time I call up stuff from DX I'm going to get three or four more drop ins.

Click to expand...

replace the dead emitter with this and you'll fire up
http://www.dealextreme.com/details.dx/sku.11023

PlayboyJoeShmoe said:

update:

Read about using a 9v battery to test. The LED itself is what is dead.

The module is ok. I cut the wires rather than unsoldered the LED.

The LED base was not thermally attached to the module anyhow.

Next time I call up stuff from DX I'm going to get three or four more drop ins.

Click to expand...

errmmm, I hope you didnt test the LED with the 9V battery?
If you did its definatley dead now!

No matter. The Lumapower M1 I got at DFW flashapalooza makes me forget about it!