Couple of details.... guys, when I say hot I mean black car on a sunny day hot, not "ohhhh crap, something is gonna melt!" hot. I think, when I turned it off it had reached kind of it's max heat.... where the heat displaced equaled the heat generated. I don't think it would have gotten much, if any hotter. I could hold and use it easily, as long as I held the handle end and not the emitter. I was a little worried if the emitter was that hot the actual LED might be a lot hotter and I didn't want to break my new toy on it's inagural run.
It's a LED Engin green, BIN unknown. I'm guessing it's the midlle bin. Mouser has it listed at 425 Lumens, presumably at the nominal rating of 700 MA. It's on a typical star base, except it has solder pads for each of the 4 LEDs seperatly. That is important, it allows you to get to each one individually. As ERV pointed out, that could mean uber-cool things for RGB or RGBA sabers!
Voltage.... the rated forward voltage of the LED is somewhere between 12.8 and 15.7V with all 4 of the LED's connected in SERIES. To let me get away with a feasible battery pack, I have 2 sets of LEDs connected in series. Each Buckpuck drives only 2 of the LEDs, with a forward voltage of 6.4 to 7.85 volts. Well within the range of an 8 cell NiMh pack.
The batteries themselves... fairly conventional. 8 Cell NiMh AA sized batteries, 2600 MAH. I'm using a flat 4 battery pack, and a square 4 battery pack like the ones from Radio Shack to hold the batteries. The two packs are just for placement issues... the sound board and my Op-amp Buckpuck controller are on top of the flat 4 battery pack.
Link to the LED spec sheet:
http://www.ledengin.com/products/10wLZ/LZ4-00G110.pdf
Link to the MCPCB spec sheet, shows how you can solder to each LED inividually and run any series/paralel config you want.
http://ledengin.com/products/appnote...CPCBapNote.pdf
So... I'm only claiming 425 lumens on this one.
Now, the next one... well, LOL I have some ideas. ;-P
(How about driving with a CF at 1 amp, and using the Power Extenders to activate a buckpuck @ 1 amp for the second set?) 2 Amps @ 7.2V (Average FV for this) and you'd be putting out 14.4 Watts..... Booyah! Might need a fan for that, though. )
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