badboy 500 question

photorob · Apr 16, 2007

So here is the set up. I have a badboy 500 running 4 lux threes. What would be my max input voltage. I tried to get a general runtime number, so I ran a 18650 cell and got one and one half hours off of it. I'm probably going to end up running 4 to 8 Nmh AA's when all is said and done. I want to try to get at least 4 hours of runtime.

photorob · Apr 16, 2007

Can one of the moderator move this thread to another section. I don't think I'm going to get enough views here.

zelda · Apr 19, 2007

This link (from sandwich shoppe) should help:

http://home.comcast.net/~theledguy/cpf_store/sandwiches/techical_data.htm

maybe the Shark( http://theledguy.chainreactionweb.com/product_info.php?cPath=48_49_61&products_id=721 ) is the bether choice for multiple leds.

zelda

LED Zeppelin · Apr 25, 2007

Photorob,

The max input for the Badboy is 10V, but to be safe Wayne recommends 9V.
This is below the combined Vf of 4 Lux IIIs in series so you should be fine with 9V.

Assuming each emitter has a Vf of 3.25V (borderline H/J bin), 4 emitters in series, driven at 500 mA, Vin of 9V, and a runtime of 4 hrs, the computed solution for your 9V battery pack's capacity would be 3750 mAh.

I used Wayne's runtime calculator algorithm here:
http://theledguy.chainreactionweb.com/resistor_calc.php

A suitable solution would be 2 X 18650.

photorob · Apr 26, 2007

Thanks for the very helpful reply. I've been waiting for a proper answer for a while now.

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