FoC resistors

[bill_fimm]

Hello all. Maybe someone here could give me some more info/opinions about this. I am using the white die of a tri-cree for FoC, and resistor calculators call for a 1 ohm, 2W. In some cases, people have told me you don't need a resistor for the FoC. Is this because this die is on for such a short burst? I will not have blade lock-up on my board, so will this be OK, or should I resistor the FoC LED?

[FenixFire]

It is always safer to use a resistor, $0.20 vs $20. Check math, on a 3.7v setup 1W or even 1/2W should work.

[bill_fimm]

Thank you. I will try a few different online calculators... one with a smaller wattage will take up less space.. Which is really good for me. Thanks.

[FenixFire]

Do the math by hand. The calculators round up a lot.

[bill_fimm]

Yup, 1 ohm 1W will be more than enough. I did the math based off 4volts. My battery after charging it up for a few hours is reading over 3.9 v on my multimeter. Thanks.