just use: R=E/I

    -where "R" is the resistance needed, "E" is the voltage (12V), and "I" is the amperage.

E=MCsquared, at least that what i always say

you are all wrong

R=V/A
oh.....yeah and E=Mc

hahahahh, i found that joke sooo funny  :)

I am building the Baybus mod from hitechmods and am running into trouble, im really confused, first off im building it with just a 12v and an off... my problem is that if its sending 12v through it what type of resistance do i need for my 2.1-2.8v LED. It tells how to do it on the page but it keeps talking about the 7v side and thats confusing cause there is no 7v side. what im trying to say is... do i do the
       
12v - LEDv ÷ Ma

or do i do it by 7v instead of 12 like the wedpage keeps trying to talk about?

ya v=current times resistance

yeah but do you know what E=MCsquared means?

ooo...ooo... i do! i do! it means Energy=Mass Content Squared

i.e. energy = sheep of light

cypher, you're a idiot! that's the same thing! E=V &  I=A