LED resistors what to use?

Hi guys I am working on a house number sign made out of LEDs I have blue LED's and according to the LED Calc. here **broken link removed** it says that I should be using 470 ohm resistors if my supply is 12 volts and the diode forward voltage is 3.3 (3.3 is just a guess because the help button on the calc says blue is 3.3 I don't have the spec to the LED). So I just wanted to know instead of using 470 ohms can I use 530 - 540 because I'm actually being kinda cheap and that's all I have is 530's. will it make a huge difference if I go with a higher ohm? your guys help will be greatly appreciated.

Oh and if anyone lives in western Canada what is the best and cheapest place to buy electronic components from, internet or retail store?

Thank You

the slight increase in resistance shouldn't be noticiable anyway IMO

it shouldn't be a problem at all, and I stand by that.

sammy004 said:

Oh and if anyone lives in western Canada what is the best and cheapest place to buy electronic components from, internet or retail store?

Thank You

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If you live in Vancouver. Lees Electronics on Main street is an excellent place for basic electronic componets, for mailorder www.DipMicro.com is good as well. For the big boys Digikey and Newark are good as well, but you will have to pay a bit extra for shipping. DipMicro can order anyhting from newark for a small surcharge and add it to your order with them which is nice. good for the hard to find items that they don't stock.

Thanks for the reply guys, I will look at those retails I use to go to RP Electronics but I think they were a little expensive.