First Build Cree or Rebel

[FROST]

1 of: SPST Latching Guarded switch with blue button
1 of: 2.7ohm 10w resistor
1 of: 4AAA battery holder with mount
1 of: Cree Star LED & MHSV1 Heatsink Module or Rebel Star LED & MHSV1 Heatsink Module
I'm hoping to use the Cree. Would this electronics setup work or are there any changes I should make?

[darth_chasm]

Welcome aboard.

Your resistor value will depend on the color you've chosen, which you haven't provided.

[FROST]

Im in the process of making two sabers one would use an Amber Cree XP-E2 CopperNova and the other a Blue Cree XP-E2 CopperNova.

[NanoRex]

Well then you would need two different resistors, wouldn't you?

Or you could use a BuckPuck if you wanted.

[FROST]

So doing some quick math if I'm running them off of 4 aaa batteries which have 6v I need a 3.9ohm 5w resistor for the amber Cree(Forward Voltage @1000mA = 2.65v) and a 2.7ohm 10w resistor for the blue cree(Forward Voltage @1000mA = 3.47v). Can someone confirm if this is right. Thanks in advance.

[darth_chasm]

Im in the process of making two sabers one would use an Amber Cree XP-E2 CopperNova and the other a Blue Cree XP-E2 CopperNova.

Youll need two resistors with different values based on the each led's specs and your battery voltage, which I think is probably 4.8v. There is a tutorial on ohms law that you can check out to do the calculations.

I won't push the issue, I will only say that a rechargeable li-ion battery will give you better performance.

Good luck and feel free to post your calculations for a accuracy check.

EDIT: You beat me to the punch. Those numbers look right to me.

[Silver Serpent]

6 volts for alkaline, 4.8 volts for NiMH.

If you have the room, I would bump up to AA sized alkalines. If you use AAA batteries, your saber will eat them like candy. Rechargeables are much better in the long run, but a little more expensive to start out.