Quote Originally Posted by NealP View Post
Ohms Law Sam.
0.5R is too low mate

P=VI=Vsquared/R

1/2 ohm will probably be a length of wire
i did think that at the time,

it was late,

doh I is current, and we need reistance here any way lol

r=Vsq/p

r=12sq/5

r= 28.8 ohms

thats a better anser,

So a 30 ohm resistor will do it,

Note to self dont do math late at night