Thread: Total Geekiness
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Old 04-15-05 | 07:08 AM
  #713  
jeff-o
Recumbent Evangelist
 
Joined: Mar 2005
Posts: 2,991
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From: Kitchener, Ontario

Bikes: Rebel Cycles Trike, Trek 7500FX

Alright, the old chinese "luxeons" are off, and the new genuine ones are attached. After I'm finished work at 11 today, I'll assemble the rest of the lights.

It's interesting, it says right on the Luxeon datasheets that the heat slug on the bottom of the emitter is not electrically neutral, and should be allowed to connect to either the anode or the cathode of the LED. The chinese knockoff is built almost exatly the same, yet the heatsink it's mounted to in the flashlight connects the slug to BOTH the terminals... perhaps the slug on the chinese version is insulated? It sure looked like bare metal to me. In any case, I cut up a TO220 transistor insulator and put a piece under the new luxeons... just in case. I hope that the thermal transfer isn't affected too much though.

All this info is probably boring you all to death, but nobody I know really cares too much about this project. Ah well, they will when they see it done, and want one of their own! Haha. Anyway, back to work now.
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