Need help with resistor watt/ohms on pulsevu 2

[Mailyfesux]

I am planning to install the pulsevu 2 using the tutorial in this section of the forum. I'm going to buy these smds

http://www.unique-leds.com/index.php?target=products&product_id=1734

I am not sure how to calculate the watts and ohms needed for resistors. Can I use the resistor on the pulsevu 2? or do I absolutely have to buy some?

[Modded Matt]

tecnically you dont have to use any resistors. but I would not recomend it. resistors protect the led's from getting too much current, if they get too much they will burn out quickly.

to calculate what resistors you need, you need four variables.
1=FV of the LED
2=current of led
3= supply voltage
4= number of leds

I can answer numbers one and two for you the others you are on your own, or maybe someone here knows supply voltage for a DS as I have never touched one.

answer:
1=3.0V
2=20ma


use this calculator when you have the other two variables and it will tell you what resistor to use.
http://www.led-calculator.com/

[Mailyfesux]

Supply voltage is 3.7 and number of led's is around 5. So will this suffice?

http://www.amazon.com/Vishay-Dale-Surface-Resistor-CRCW0805-PB-Continuous/dp/B001IE82SO/ref=sr_1_2?ie=UTF8&s=industrial&qid=1271992009&sr=1-2

or 

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=P36ACT-ND&itemSeq=85326455&uq=634075731663566538

[Modded Matt]

yes, those are 36ohm resistors, I however would not use a surface mt resistor

[Mailyfesux]

Got it! Thanks!