Basic Stunt Check

[Tom Starkiller]

Hi guys.

It's been a heck of a long time (High school) since I've done electronics so I'm having to relearn how everything works. Before going on to building a sabre with sound, I want to put a basic stunt sabre together as a practice run. (I did finally get around to putting one together last week but it'd been sitting in my draw for 5 or 6 years and so I have no idea how I worked the resistor out. Lights up fine though. )

I'm thinking this battery pack:
http://www.thecustomsabershop.com/4A...ctor-P724.aspx

and a blue rebel.
Blue 70lm @ 700mA 3.4v - Run at 1000mA

Here's where I need some maths checking:

6V - 3.4Vf = 2.6V

If the power supply is 2.6 and the LED is run at 1000mA:

1000mA = 1A

R = V / I

R = 2.6V / 1A

R = 2.6ohm?

Nearest resistor in stock is a 2.7ohm 10w. So... do I go for that or the 2.2ohm 5w?

Hopefully, I'm on the right track here.

[Silver Serpent]

2.7 ohm is the correct resistor. If you have the room in your hilt, consider bumping up to AA sized batteries for much better runtime.

[Tom Starkiller]

Ace. Thanks very much for that. I shall consider it the AA.

[Thalan the Exiled]

Even better go with a Li-ion and a recharge port and never buy batteries. My 18500 pack from the store here gives me 2-3 hours and I have sound. Now that is only about 1-2 hours actual run time but still. If you go with a larger mAh pack you can get a longer run time. And if you go with a 7.4v pack you can just use a buckpuck and be done. No math yay!