10W ledengin Question

[Master Valon]

Ok, so I think I'll do this. I'll get the 8x AAA holder, fill them with NiMHs, to get 12V, and drive it with the 1000mA 'Puck to give it a safe but powerful 12W. Anyone tell me if this isn't safe for some reason, because I REALLY don't want to blow this thing out. And Sunrider, I figured anything will be brighter than the 3W Lux. III Green led I have been powering with 4x AAAs and an MR soundboard, and I wanted a really rich, deep color, so I don't think I'll be dissapointed!

Edit: Oh, and for heat, I'll coat the heatsink with thermal compound(Arctic Silver 5) that they use in computers, and drill some vent holes in the hilt.

[Sunrider]

Keep in mind that a buck puck needs 1 volt over vf to work so 12v pack does not give enough overhead. There are boost drivers out there too mind you.




What is a boost driver you ask? http://en.wikipedia.org/wiki/Boost_converter

[Master Valon]

So would my original 14.4V pack work?

[Azmaria Dei]

for most of its charge yes. but you won't be able to run a soundboard with it. there aren't any that can take that much voltage.

[Master Valon]

Yeah, I decided to build a really bright stunt saber with this one. Now, how much run time shall I expect from this build? Like, half an hour, an hour???

[Sunrider]

Seriously. I would expect a AAA pack to blow up driving a 10w at 12 watts. You really need li ion here. A 12 cell pack is most impractical. 2 18650s could actually handle the current and would have better run time.

[Master Valon]

But the operating voltage of this led is 10.5V, and wouldn't 2 18650s only provide 7.4V? Could I use 3 AA sized 14500s and a dummy AA in 2 2x AA holders to get 11.1V in conjunction with a 1000mA 'Puck?
Edit: Wait, those are unprotected, nevermind. What do you suggest I do then, seeing as 2 18650s won't get this thing started...

[Sunrider]

PMed you

[PhoenixReborn]

You should be able to rewire the deep red in a different configuration. 10.5V is all 4 dies in series. Each die requires 2.625V. I'd just use 2 18650s, and put the LED in series/parallel configuration. 5.25V @ 1400mA for 2 dies at a time.

[Sunrider]

Yes but he already said he got the serial pcb.