Building a new saber after being gone a while.

[RavenXp]

Currently planning a saber staff, using the newer PRIZM 5.1 board. My last experience was using a petite crouton board. My question is this, going over the PRIZM users manual it says the high powered LEDs should have resistors installed and I'm having a little trouble with the resistor calculations. This is the die I'm planning on using:

Red/Green/Royal Blue Cree XP-E2 CopperNova

Green Cree Part# XPEBGR-L1-0000-00G01
130 Minimum Luminous Flux @ 350mA
Forward Voltage @1000mA = 3.7

Red Cree Part# XPEBRD-L1-0000-00901
80.6 Minimum Luminous Flux @ 350mA
Forward Voltage @1000mA = 2.65v

Royal Blue Cree Part# XPEBRY-L1-0000-00S01
650mW Minimum Radiant Flux @ 350mA
Forward Voltage @1000mA = 3.4v

Do I need resistors? The main issue I'm having is are these newer tri cree LEDs really equal in allowing 1000mA current? The last one I used had a max current for the red die at 700mA. That and the 'minimum radiant flux' is also confusing me.

Edit: after doing a bit more digging, assuming the power supply voltage is 3.7, the green die would need no resistor per say, the red die would need a 1.05 ohm resistor, and the Royal blue die would need a 300 mohm resistor. Now I just need someone to confirm my math.

[Forgetful Jedi Knight]

You should have at least a minimal resistor on each die. And you will have to “round up” the resistor values to the next “common” resistor available.

[RavenXp]

You should have at least a minimal resistor on each die. And you will have to “round up” the resistor values to the next “common” resistor available.

How do I decided wattage for the minimal resistor when the calculation is essentially returning a 0?

[RavenXp]

I'm having trouble with these values, I'm either missing some peice of info needed to correctly calculate or my brain just isn't getting the calculations.

Any help would be greatly appreciated, wanna get this sorted so I can order all my parts.

[Silver Serpent]

If your resistor calculations give you a 0 ohm requirement, then you can use a resistor in the range of 1/2 ohm to 1 ohm.

These are good:
http://www.thecustomsabershop.com/5o...tor-P1050.aspx
http://www.thecustomsabershop.com/1o...istor-P21.aspx

[RavenXp]

If your resistor calculations give you a 0 ohm requirement, then you can use a resistor in the range of 1/2 ohm to 1 ohm.

These are good:
http://www.thecustomsabershop.com/5o...tor-P1050.aspx
http://www.thecustomsabershop.com/1o...istor-P21.aspx

What about the wattage for said resistor? Or does that not matter for this application?

[PCModulus]

What about the wattage for said resistor? Or does that not matter for this application?

1/8-1/4 at most.

[RavenXp]

Awesome, thank you guys. Think that completes my list of parts needed, now the hard part. The wait.