i would be using an nimh battery which is 3.7v 1100mah to power the atomizer
the atomizer is composed of the nichrome wire and silica fire wick which can be seen here in the pic the white rope is wick and the wire is the loop the surrounds it.
I prefer to use 36ga which is 27 ohms per foot. (Most factory wire is thinner 38ga.) At 27 ohms per foot, 1" of wire is 2.25ohms per inch.( 27/12=2.25)
1/2" would be 1.125 ohms (2.25/2=1.25), 1/4" would be .56 ohms (1.25/2=.56) and lastly 1/8" would be .28 ohms (.56/2=.28).
with these stuff i want to control the voltage using buttons mounted in the arduino, 3 buttons to be exact 1 for set and 2 for the +/- of the voltage
so it could go up to 6v